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Pyridine

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Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.

Quantity Value Units Method Reference Comment
Deltafgas140.2kJ/molCcbHubbard, Frow, et al., 1961ALS
Deltafgas140.6 ± 1.5kJ/molCmAndon, Cox, et al., 1957ALS
Deltafgas140.7 ± 1.5kJ/molCcbCox, Challoner, et al., 1954ALS
Deltafgas110.1kJ/molN/AConstam and White, 1903Value computed using «DELTA»fHliquid° value of 69.9 kj/mol from Constam and White, 1903 and «DELTA»vapH° value of 40.2 kj/mol from Hubbard, Frow, et al., 1961.; DRB

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Deltafliquid99.96 ± 0.50kJ/molCcbHubbard, Frow, et al., 1961ALS
Deltafliquid100.2 ± 1.5kJ/molCcbCox, Challoner, et al., 1954ALS
Deltafliquid69.9kJ/molCcbConstam and White, 1903ALS
Quantity Value Units Method Reference Comment
Deltacliquid-2725.kJ/molCcbStrepikheev, Baranov, et al., 1962ALS
Deltacliquid-2782.2 ± 0.42kJ/molCcbHubbard, Frow, et al., 1961ALS
Deltacliquid-2782.4 ± 1.5kJ/molCcbCox, Challoner, et al., 1954ALS
Deltacliquid-2758.kJ/molCcbConstam and White, 1903ALS
Quantity Value Units Method Reference Comment
liquid177.90J/mol*KN/AMcCullough, Douslin, et al., 1957DH
liquid179.1J/mol*KN/AParks, Todd, et al., 1936Extrapolation below 90 K, 50.04 J/mol*K.; DH
liquid210.41J/mol*KN/APearce and Bakke, 1936Extrapolation below 90 K, 89.33 J/mol*K.; DH

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
193.4293.Rastorguev and Ganiev, 1967T = 293 to 353 K.; DH
133.298.15Hubbard, Frow, et al., 1961DH
146.9332.Swietoslawski and Zielenkiewicz, 1958Mean value 22 to 96°C.; DH
132.72298.15McCullough, Douslin, et al., 1957T = 10 to 350 K.; DH
134.93298.1Parks, Todd, et al., 1936T = 90 to 300 K.; DH
133.30298.1Pearce and Bakke, 1936T = 90 to 298 K. Value is unsmoothed experimental datum.; DH
129.3289.Radulescu and Jula, 1934DH
135.35273.4Swietoslawski, Tybicka, et al., 1931DH
135.6290.Swietoslawski, Tybicka, et al., 1931, 2DH
129.33294.Mathews, Krause, et al., 1917DH
130.5283.Bramley, 1916Mean value, 0 to 20°C.; DH

Phase change data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director
BS - Robert L. Brown and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil388.5 ± 0.6KAVGN/AAverage of 80 out of 84 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus232. ± 2.KAVGN/AAverage of 26 values; Individual data points
Quantity Value Units Method Reference Comment
Ttriple231.48KN/AHelm, Lanum, et al., 1958Uncertainty assigned by TRC = 0.03 K; measured in calorimeter at USBM, Bartlesville, OK; TRC
Ttriple231.480KN/AMcCullough, Douslin, et al., 1957, 2Uncertainty assigned by TRC = 0.05 K; by extrapolation of 1/f to zero; TRC
Quantity Value Units Method Reference Comment
Tc619. ± 2.KAVGN/AAverage of 9 values; Individual data points
Quantity Value Units Method Reference Comment
Pc56.60barN/ABrunner, 1987Uncertainty assigned by TRC = 0.0565 bar; Visual, optical cell 30cm high. P transducer cal. vs PB.; TRC
Pc56.40barN/AKobe, Ravicz, et al., 1956Uncertainty assigned by TRC = 1.034 bar; TRC
Pc60.795barN/AHerz and Neukirch, 1923Uncertainty assigned by TRC = 0.8106 bar; TRC
Quantity Value Units Method Reference Comment
Vc0.253l/molN/AKobe, Ravicz, et al., 1956Uncertainty assigned by TRC = 0.005 l/mol; TRC
Quantity Value Units Method Reference Comment
Deltavap40.3 ± 0.3kJ/molAVGN/AAverage of 10 out of 11 values; Individual data points

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
35.09388.4N/AMajer and Svoboda, 1985 
39.3324.N/AUkraintseva, Soldatov, et al., 1997Based on data from 289. - 358. K.; AC
37.6354.N/ABlanco, Beltran, et al., 1994Based on data from 346. - 362. K.; AC
39.9310.EBLencka, 1990Based on data from 295. - 388. K.; AC
39.7311.AStephenson and Malanowski, 1987Based on data from 296. - 353. K.; AC
37.3363.AStephenson and Malanowski, 1987Based on data from 348. - 434. K.; AC
35.0446.AStephenson and Malanowski, 1987Based on data from 431. - 558. K.; AC
34.0567.AStephenson and Malanowski, 1987Based on data from 552. - 620. K.; AC
37.6355.EBStephenson and Malanowski, 1987Based on data from 340. - 426. K. See also McCullough, Douslin, et al., 1957.; AC
39.6313.CMichou-Saucet, Jose, et al., 1986Based on data from 298. - 333. K.; AC
39.4313.CMajer, Svoboda, et al., 1984AC
38.5328.CMajer, Svoboda, et al., 1984AC
37.7343.CMajer, Svoboda, et al., 1984AC
36.3368.N/AMajer, Svoboda, et al., 1984AC
37.5 ± 0.1346.CMcCullough, Douslin, et al., 1957AC
36.4 ± 0.1366.CMcCullough, Douslin, et al., 1957AC
35.1 ± 0.1388.CMcCullough, Douslin, et al., 1957AC
38.4335.MGHerington and Martin, 1953Based on data from 320. - 388. K.; AC
44.4273.N/AMeulen and Mann, 1931Based on data from 258. - 389. K.; AC

Enthalpy of vaporization

ΔvapH = A exp(-βTr) (1 − Tr)β
    ΔvapH = Enthalpy of vaporization (at saturation pressure) (kJ/mol)
    Tr = reduced temperature (T / Tc)

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Temperature (K) A (kJ/mol) beta Tc (K) Reference Comment
298. - 388.55.430.2536620.Majer and Svoboda, 1985 

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
340.5 - 426.044.162721371.358-58.496McCullough, Douslin, et al., 1957Coefficents calculated by NIST from author's data.

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
8.2785231.49McCullough, Douslin, et al., 1957Includes energy of anomaly at about 210 K.; DH
8.28231.5Domalski and Hearing, 1996AC
8.272231.1Parks, Todd, et al., 1936DH
3.100230.38Pearce and Bakke, 1936DH

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
35.76231.49McCullough, Douslin, et al., 1957Includes; DH
35.79231.1Parks, Todd, et al., 1936DH
13.46230.38Pearce and Bakke, 1936DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
RCD - Robert C. Dunbar

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

C5H4N- + Hydrogen cation = Pyridine

By formula: C5H4N- + H+ = C5H5N

Quantity Value Units Method Reference Comment
Deltar1631. ± 8.4kJ/molIMRESchafman and Wenthold, 2007gas phase; B
Deltar1636. ± 10.kJ/molTDEqMeot-ner and Kafafi, 1988gas phase; anchored to 88MEO scale, not the "87 acidity scale". The Kiefer, Zhang, et al., 1997 BDE is for ortho.; B
Quantity Value Units Method Reference Comment
Deltar1601. ± 8.4kJ/molTDEqMeot-ner and Kafafi, 1988gas phase; anchored to 88MEO scale, not the "87 acidity scale". The Kiefer, Zhang, et al., 1997 BDE is for ortho.; B
Deltar1607. ± 13.kJ/molIMRBDePuy, Kass, et al., 1988gas phase; Comparable to water in acidity; B
Deltar<1574. ± 8.4kJ/molIMRBBruins, Ferrer-Correia, et al., 1978gas phase; O- deprotonates; B

C5H6N+ + Pyridine = (C5H6N+ bullet Pyridine)

By formula: C5H6N+ + C5H5N = (C5H6N+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar105.kJ/molPHPMSMeot-Ner (Mautner), 1992gas phase; M
Deltar103.kJ/molPHPMSMeot-Ner M. and Sieck, 1983gas phase; M
Deltar110.kJ/molHPMSHolland and Castleman, 1982gas phase; M
Deltar99.2kJ/molPHPMSMeot-Ner (Mautner), 1979gas phase; M
Deltar99.2kJ/molPHPMSMeot-Ner (Mautner), 1979gas phase; M
Quantity Value Units Method Reference Comment
Deltar124.J/mol*KPHPMSMeot-Ner (Mautner), 1992gas phase; M
Deltar118.J/mol*KPHPMSMeot-Ner M. and Sieck, 1983gas phase; M
Deltar134.J/mol*KHPMSHolland and Castleman, 1982gas phase; M
Deltar120.J/mol*KPHPMSMeot-Ner (Mautner), 1979gas phase; M
Deltar120.J/mol*KPHPMSMeot-Ner (Mautner), 1979gas phase; M

Pyridine + 3Hydrogen = Piperidine

By formula: C5H5N + 3H2 = C5H11N

Quantity Value Units Method Reference Comment
Deltar-193.8 ± 0.75kJ/molEqkHales and Herington, 1957gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -202.2 ± 0.75 kJ/mol; At 400-550 K; ALS
Deltar-193.0 ± 2.1kJ/molEqkBurrows and King, 1935liquid phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -188.3 kJ/mol; At 423-443 K; ALS

Chlorine anion + Pyridine = (Chlorine anion bullet Pyridine)

By formula: Cl- + C5H5N = (Cl- bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar53.1 ± 8.4kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar82.4J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar28. ± 11.kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B

(C5H6N+ bullet 2Pyridine) + Pyridine = (C5H6N+ bullet 3Pyridine)

By formula: (C5H6N+ bullet 2C5H5N) + C5H5N = (C5H6N+ bullet 3C5H5N)

Quantity Value Units Method Reference Comment
Deltar56.9kJ/molHPMSHolland and Castleman, 1982gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Deltar159.J/mol*KHPMSHolland and Castleman, 1982gas phase; Entropy change is questionable; M

Lithium ion (1+) + Pyridine = (Lithium ion (1+) bullet Pyridine)

By formula: Li+ + C5H5N = (Li+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar181. ± 15.kJ/molCIDTAmunugama and Rodgers, 2000RCD
Deltar180.kJ/molICRStaley and Beauchamp, 1975gas phase; switching reaction(Li+)H2O, from graph; Dzidic and Kebarle, 1970 extrapolated; M

Potassium ion (1+) + Pyridine = (Potassium ion (1+) bullet Pyridine)

By formula: K+ + C5H5N = (K+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar90. ± 4.kJ/molCIDTAmunugama and Rodgers, 2000RCD
Deltar86.6kJ/molHPMSDavidson and Kebarle, 1976gas phase; M
Quantity Value Units Method Reference Comment
Deltar77.8J/mol*KHPMSDavidson and Kebarle, 1976gas phase; M

(Silver ion (1+) bullet 2Pyridine) + Pyridine = (Silver ion (1+) bullet 3Pyridine)

By formula: (Ag+ bullet 2C5H5N) + C5H5N = (Ag+ bullet 3C5H5N)

Quantity Value Units Method Reference Comment
Deltar69.9kJ/molHPMSHolland and Castleman, 1982gas phase; M
Quantity Value Units Method Reference Comment
Deltar117.J/mol*KHPMSHolland and Castleman, 1982gas phase; M

(Silver ion (1+) bullet 3Pyridine) + Pyridine = (Silver ion (1+) bullet 4Pyridine)

By formula: (Ag+ bullet 3C5H5N) + C5H5N = (Ag+ bullet 4C5H5N)

Quantity Value Units Method Reference Comment
Deltar74.9kJ/molHPMSHolland and Castleman, 1982gas phase; M
Quantity Value Units Method Reference Comment
Deltar169.J/mol*KHPMSHolland and Castleman, 1982gas phase; M

(Chlorine anion bullet Pyridine) + Pyridine = (Chlorine anion bullet 2Pyridine)

By formula: (Cl- bullet C5H5N) + C5H5N = (Cl- bullet 2C5H5N)

Quantity Value Units Method Reference Comment
Deltar49.0kJ/molPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar94.6J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M

(C5H6N+ bullet Pyridine) + Pyridine = (C5H6N+ bullet 2Pyridine)

By formula: (C5H6N+ bullet C5H5N) + C5H5N = (C5H6N+ bullet 2C5H5N)

Quantity Value Units Method Reference Comment
Deltar52.7kJ/molHPMSHolland and Castleman, 1982gas phase; M
Quantity Value Units Method Reference Comment
Deltar124.J/mol*KHPMSHolland and Castleman, 1982gas phase; M

H2O3- + Pyridine + Water = C5H7NO3-

By formula: H2O3- + C5H5N + H2O = C5H7NO3-

Quantity Value Units Method Reference Comment
Deltar137. ± 9.6kJ/molN/ALe Barbu, Schiedt, et al., 2002gas phase; Affinity is difference in EAs of lesser solvated species; B

Oxygen anion + Pyridine = C5H5NO2-

By formula: O2- + C5H5N = C5H5NO2-

Quantity Value Units Method Reference Comment
Deltar90.8 ± 9.6kJ/molN/ALe Barbu, Schiedt, et al., 2002gas phase; Affinity is difference in EAs of lesser solvated species; B

Nitric oxide anion + Pyridine = C5H5N2O-

By formula: NO- + C5H5N = C5H5N2O-

Quantity Value Units Method Reference Comment
Deltar56.9 ± 9.6kJ/molN/ALe Barbu, Schiedt, et al., 2002gas phase; Affinity is difference in EAs of lesser solvated species; B

3Pyridine, 1-oxide + potassium chloride = 3Pyridine + KClO3

By formula: 3C5H5NO + ClK = 3C5H5N + KClO3

Quantity Value Units Method Reference Comment
Deltar315. ± 10.kJ/molCmShaofeng and Pilcher, 1988solid phase; ALS

3Pyridine, 1-oxide + potassium bromide = 3Pyridine + KBrO3

By formula: 3C5H5NO + BrK = 3C5H5N + KBrO3

Quantity Value Units Method Reference Comment
Deltar313.6 ± 9.6kJ/molCmShaofeng and Pilcher, 1988solid phase; ALS

Iron ion (1+) + Pyridine = (Iron ion (1+) bullet Pyridine)

By formula: Fe+ + C5H5N = (Fe+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar223. ± 9.2kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Chromium ion (1+) + Pyridine = (Chromium ion (1+) bullet Pyridine)

By formula: Cr+ + C5H5N = (Cr+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar197. ± 12.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Titanium ion (1+) + Pyridine = (Titanium ion (1+) bullet Pyridine)

By formula: Ti+ + C5H5N = (Ti+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar217. ± 9.6kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Manganese ion (1+) + Pyridine = (Manganese ion (1+) bullet Pyridine)

By formula: Mn+ + C5H5N = (Mn+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar182. ± 8.8kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Scandium ion (1+) + Pyridine = (Scandium ion (1+) bullet Pyridine)

By formula: Sc+ + C5H5N = (Sc+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar231. ± 10.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Magnesium ion (1+) + Pyridine = (Magnesium ion (1+) bullet Pyridine)

By formula: Mg+ + C5H5N = (Mg+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar200. ± 6.7kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Vanadium ion (1+) + Pyridine = (Vanadium ion (1+) bullet Pyridine)

By formula: V+ + C5H5N = (V+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar218. ± 13.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Nickel ion (1+) + Pyridine = (Nickel ion (1+) bullet Pyridine)

By formula: Ni+ + C5H5N = (Ni+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar255. ± 15.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Aluminum ion (1+) + Pyridine = (Aluminum ion (1+) bullet Pyridine)

By formula: Al+ + C5H5N = (Al+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar190. ± 10.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Zinc ion (1+) + Pyridine = (Zinc ion (1+) bullet Pyridine)

By formula: Zn+ + C5H5N = (Zn+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar247. ± 7.1kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Cobalt ion (1+) + Pyridine = (Cobalt ion (1+) bullet Pyridine)

By formula: Co+ + C5H5N = (Co+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar247. ± 13.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Copper ion (1+) + Pyridine = (Copper ion (1+) bullet Pyridine)

By formula: Cu+ + C5H5N = (Cu+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar246. ± 10.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Sodium ion (1+) + Pyridine = (Sodium ion (1+) bullet Pyridine)

By formula: Na+ + C5H5N = (Na+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar127. ± 3.kJ/molCIDTAmunugama and Rodgers, 2000RCD

Henry's Law data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Rolf Sander

Henry's Law constant (water solution)

kH(T) = H exp(d(ln(kH))/d(1/T) ((1/T) - 1/(298.15 K)))
H = Henry's law constant for solubility in water at 298.15 K (mol/kg*bar)
d(ln(kH))/d(1/T) = Temperature dependence constant (K)

H (mol/kg*bar) d(ln(kH))/d(1/T) (K) Method Reference Comment
89. QN/A missing citation give several references for the Henry's law constants but don't assign them to specific species.
110.5900.MN/A 

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
MM - Michael M. Meot-Ner (Mautner)
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Quantity Value Units Method Reference Comment
IE (evaluated)9.26 ± 0.01eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)930.kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity898.1kJ/molN/AHunter and Lias, 1998HL

Proton affinity at 298K

Proton affinity (kJ/mol) Reference Comment
936.5 ± 8.5Wind, Papp, et al., 2005T = 298K; MM

Protonation entropy at 298K

Protonation entropy (J/mol*K) Reference Comment
-1. ± 10.Wind, Papp, et al., 2005T = 298K; MM

Ionization energy determinations

IE (eV) Method Reference Comment
9.34 ± 0.03EIArimura and Yoshikawa, 1984LBLHLM
9.25TRPILifshitz, 1982LBLHLM
9.60PEKimura, Katsumata, et al., 1981LLK
9.26PEUtsunomiya, Kobayashi, et al., 1978LLK
9.25PIEland, Berkowitz, et al., 1978LLK
9.74 ± 0.05EIZaretskii, Oren, et al., 1976LLK
~9.5EIVan Veen and Plantenga, 1975LLK
9.9 ± 0.1EIStefanovic and Grutzmacher, 1974LLK
9.263PEKing, Murrell, et al., 1972LLK
9.66 ± 0.03EIJohnstone and Mellon, 1972LLK
9.70 ± 0.05EIDistefano, Foffani, et al., 1971LLK
9.70EIDistefano, Foffani, et al., 1971, 2LLK
9.30 ± 0.01PIPotapov and Sorokin, 1970RDSH
9.10PEGoffart, Momigny, et al., 1969RDSH
9.10 ± 0.01PIGoffart, Momigny, et al., 1969RDSH
9.31PEDewar and Worley, 1969RDSH
9.28PEAl-Joboury and Turner, 1964RDSH
9.20 ± 0.05PIAkopyan and Vilesov, 1964RDSH
9.4PITerenin, 1961RDSH
9.266SEl-Sayed, Kaaba, et al., 1961RDSH
9.23 ± 0.03PIWatanabe, 1957RDSH
9.8 ± 0.2EIHustrulid, Kusch, et al., 1938RDSH
9.51PEKlasinc, Novak, et al., 1978Vertical value; LLK
9.66PEKobayashi and Nagakura, 1974Vertical value; LLK
9.7PEBatich, Heilbronner, et al., 1973Vertical value; LLK
9.6 ± 0.5PEHeilbronner, Hornung, et al., 1972Vertical value; LLK
9.59PEGleiter, Heilbronner, et al., 1970Vertical value; RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C3H3+14.00 ± 0.10?EIMomigny, Urbain, et al., 1965RDSH
C3H3N+13.84 ± 0.10C2H2EIMomigny, Urbain, et al., 1965RDSH
C4H2+16.17 ± 0.10HCN+H2EIMomigny, Urbain, et al., 1965RDSH
C4H3+16.61 ± 0.10HCN+HEIMomigny, Urbain, et al., 1965RDSH
C4H4+11.84 ± 0.05HCNTRPILifshitz and Malinovich, 1984LBLHLM
C4H4+12.6 ± 0.1HCNEIBurgers and Holmes, 1984LBLHLM
C4H4+12.34 ± 0.05HCNEIBurgers and Holmes, 1984LBLHLM
C4H4+12.0 ± 0.2HCNTRPILifshitz, 1982LBLHLM
C4H4+12.15 ± 0.02HCNPIPECORosenstock, Stockbauer, et al., 1981LLK
C4H4+11.8HCNPIEland, Berkowitz, et al., 1978LLK
C4H4+12.3 ± 0.1HCNEIRosenstock, McCulloh, et al., 1977LLK
C4H4+13.41 ± 0.05HCNEIZaretskii, Oren, et al., 1976LLK
C4H4+13.28HCNEIBeynon, Hopkinson, et al., 1969RDSH
C5H3N+12.42 ± 0.10H2EIMomigny, Urbain, et al., 1965RDSH
C5H4N+14.00 ± 0.10HEIMomigny, Urbain, et al., 1965RDSH

De-protonation reactions

C5H4N- + Hydrogen cation = Pyridine

By formula: C5H4N- + H+ = C5H5N

Quantity Value Units Method Reference Comment
Deltar1631. ± 8.4kJ/molIMRESchafman and Wenthold, 2007gas phase; B
Deltar1636. ± 10.kJ/molTDEqMeot-ner and Kafafi, 1988gas phase; anchored to 88MEO scale, not the "87 acidity scale". The Kiefer, Zhang, et al., 1997 BDE is for ortho.; B
Quantity Value Units Method Reference Comment
Deltar1601. ± 8.4kJ/molTDEqMeot-ner and Kafafi, 1988gas phase; anchored to 88MEO scale, not the "87 acidity scale". The Kiefer, Zhang, et al., 1997 BDE is for ortho.; B
Deltar1607. ± 13.kJ/molIMRBDePuy, Kass, et al., 1988gas phase; Comparable to water in acidity; B
Deltar<1574. ± 8.4kJ/molIMRBBruins, Ferrer-Correia, et al., 1978gas phase; O- deprotonates; B

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
RCD - Robert C. Dunbar
B - John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

(Silver ion (1+) bullet 2Pyridine) + Pyridine = (Silver ion (1+) bullet 3Pyridine)

By formula: (Ag+ bullet 2C5H5N) + C5H5N = (Ag+ bullet 3C5H5N)

Quantity Value Units Method Reference Comment
Deltar69.9kJ/molHPMSHolland and Castleman, 1982gas phase; M
Quantity Value Units Method Reference Comment
Deltar117.J/mol*KHPMSHolland and Castleman, 1982gas phase; M

(Silver ion (1+) bullet 3Pyridine) + Pyridine = (Silver ion (1+) bullet 4Pyridine)

By formula: (Ag+ bullet 3C5H5N) + C5H5N = (Ag+ bullet 4C5H5N)

Quantity Value Units Method Reference Comment
Deltar74.9kJ/molHPMSHolland and Castleman, 1982gas phase; M
Quantity Value Units Method Reference Comment
Deltar169.J/mol*KHPMSHolland and Castleman, 1982gas phase; M

Aluminum ion (1+) + Pyridine = (Aluminum ion (1+) bullet Pyridine)

By formula: Al+ + C5H5N = (Al+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar190. ± 10.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

C5H6N+ + Pyridine = (C5H6N+ bullet Pyridine)

By formula: C5H6N+ + C5H5N = (C5H6N+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar105.kJ/molPHPMSMeot-Ner (Mautner), 1992gas phase; M
Deltar103.kJ/molPHPMSMeot-Ner M. and Sieck, 1983gas phase; M
Deltar110.kJ/molHPMSHolland and Castleman, 1982gas phase; M
Deltar99.2kJ/molPHPMSMeot-Ner (Mautner), 1979gas phase; M
Deltar99.2kJ/molPHPMSMeot-Ner (Mautner), 1979gas phase; M
Quantity Value Units Method Reference Comment
Deltar124.J/mol*KPHPMSMeot-Ner (Mautner), 1992gas phase; M
Deltar118.J/mol*KPHPMSMeot-Ner M. and Sieck, 1983gas phase; M
Deltar134.J/mol*KHPMSHolland and Castleman, 1982gas phase; M
Deltar120.J/mol*KPHPMSMeot-Ner (Mautner), 1979gas phase; M
Deltar120.J/mol*KPHPMSMeot-Ner (Mautner), 1979gas phase; M

(C5H6N+ bullet Pyridine) + Pyridine = (C5H6N+ bullet 2Pyridine)

By formula: (C5H6N+ bullet C5H5N) + C5H5N = (C5H6N+ bullet 2C5H5N)

Quantity Value Units Method Reference Comment
Deltar52.7kJ/molHPMSHolland and Castleman, 1982gas phase; M
Quantity Value Units Method Reference Comment
Deltar124.J/mol*KHPMSHolland and Castleman, 1982gas phase; M

(C5H6N+ bullet 2Pyridine) + Pyridine = (C5H6N+ bullet 3Pyridine)

By formula: (C5H6N+ bullet 2C5H5N) + C5H5N = (C5H6N+ bullet 3C5H5N)

Quantity Value Units Method Reference Comment
Deltar56.9kJ/molHPMSHolland and Castleman, 1982gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Deltar159.J/mol*KHPMSHolland and Castleman, 1982gas phase; Entropy change is questionable; M

Chlorine anion + Pyridine = (Chlorine anion bullet Pyridine)

By formula: Cl- + C5H5N = (Cl- bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar53.1 ± 8.4kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar82.4J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar28. ± 11.kJ/molTDAsHiraoka, Mizuse, et al., 1988gas phase; B

(Chlorine anion bullet Pyridine) + Pyridine = (Chlorine anion bullet 2Pyridine)

By formula: (Cl- bullet C5H5N) + C5H5N = (Cl- bullet 2C5H5N)

Quantity Value Units Method Reference Comment
Deltar49.0kJ/molPHPMSHiraoka, Mizuse, et al., 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar94.6J/mol*KPHPMSHiraoka, Mizuse, et al., 1988gas phase; M

Cobalt ion (1+) + Pyridine = (Cobalt ion (1+) bullet Pyridine)

By formula: Co+ + C5H5N = (Co+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar247. ± 13.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Chromium ion (1+) + Pyridine = (Chromium ion (1+) bullet Pyridine)

By formula: Cr+ + C5H5N = (Cr+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar197. ± 12.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Copper ion (1+) + Pyridine = (Copper ion (1+) bullet Pyridine)

By formula: Cu+ + C5H5N = (Cu+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar246. ± 10.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Iron ion (1+) + Pyridine = (Iron ion (1+) bullet Pyridine)

By formula: Fe+ + C5H5N = (Fe+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar223. ± 9.2kJ/molCIDTRodgers, Stanley, et al., 2000RCD

H2O3- + Pyridine + Water = C5H7NO3-

By formula: H2O3- + C5H5N + H2O = C5H7NO3-

Quantity Value Units Method Reference Comment
Deltar137. ± 9.6kJ/molN/ALe Barbu, Schiedt, et al., 2002gas phase; Affinity is difference in EAs of lesser solvated species; B

Potassium ion (1+) + Pyridine = (Potassium ion (1+) bullet Pyridine)

By formula: K+ + C5H5N = (K+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar90. ± 4.kJ/molCIDTAmunugama and Rodgers, 2000RCD
Deltar86.6kJ/molHPMSDavidson and Kebarle, 1976gas phase; M
Quantity Value Units Method Reference Comment
Deltar77.8J/mol*KHPMSDavidson and Kebarle, 1976gas phase; M

Lithium ion (1+) + Pyridine = (Lithium ion (1+) bullet Pyridine)

By formula: Li+ + C5H5N = (Li+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar181. ± 15.kJ/molCIDTAmunugama and Rodgers, 2000RCD
Deltar180.kJ/molICRStaley and Beauchamp, 1975gas phase; switching reaction(Li+)H2O, from graph; Dzidic and Kebarle, 1970 extrapolated; M

Magnesium ion (1+) + Pyridine = (Magnesium ion (1+) bullet Pyridine)

By formula: Mg+ + C5H5N = (Mg+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar200. ± 6.7kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Manganese ion (1+) + Pyridine = (Manganese ion (1+) bullet Pyridine)

By formula: Mn+ + C5H5N = (Mn+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar182. ± 8.8kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Nitric oxide anion + Pyridine = C5H5N2O-

By formula: NO- + C5H5N = C5H5N2O-

Quantity Value Units Method Reference Comment
Deltar56.9 ± 9.6kJ/molN/ALe Barbu, Schiedt, et al., 2002gas phase; Affinity is difference in EAs of lesser solvated species; B

Sodium ion (1+) + Pyridine = (Sodium ion (1+) bullet Pyridine)

By formula: Na+ + C5H5N = (Na+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar127. ± 3.kJ/molCIDTAmunugama and Rodgers, 2000RCD

Nickel ion (1+) + Pyridine = (Nickel ion (1+) bullet Pyridine)

By formula: Ni+ + C5H5N = (Ni+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar255. ± 15.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Oxygen anion + Pyridine = C5H5NO2-

By formula: O2- + C5H5N = C5H5NO2-

Quantity Value Units Method Reference Comment
Deltar90.8 ± 9.6kJ/molN/ALe Barbu, Schiedt, et al., 2002gas phase; Affinity is difference in EAs of lesser solvated species; B

Scandium ion (1+) + Pyridine = (Scandium ion (1+) bullet Pyridine)

By formula: Sc+ + C5H5N = (Sc+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar231. ± 10.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Titanium ion (1+) + Pyridine = (Titanium ion (1+) bullet Pyridine)

By formula: Ti+ + C5H5N = (Ti+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar217. ± 9.6kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Vanadium ion (1+) + Pyridine = (Vanadium ion (1+) bullet Pyridine)

By formula: V+ + C5H5N = (V+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar218. ± 13.kJ/molCIDTRodgers, Stanley, et al., 2000RCD

Zinc ion (1+) + Pyridine = (Zinc ion (1+) bullet Pyridine)

By formula: Zn+ + C5H5N = (Zn+ bullet C5H5N)

Quantity Value Units Method Reference Comment
Deltar247. ± 7.1kJ/molCIDTRodgers, Stanley, et al., 2000RCD

IR Spectrum

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), UV/Visible spectrum, References, Notes

Data compiled by: Coblentz Society, Inc.

Data compiled by: Tanya L. Myers, Russell G. Tonkyn, Ashley M. Oeck, Tyler O. Danby, John S. Loring, Matthew S. Taubman, Stephen W. Sharpe, Jerome C. Birnbaum, and Timothy J. Johnson

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director


Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, UV/Visible spectrum, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Mass spectrum
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Additional Data

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Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Japan AIST/NIMC Database- Spectrum MS-NW- 79
NIST MS number 227742

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.


UV/Visible spectrum

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Victor Talrose, Eugeny B. Stern, Antonina A. Goncharova, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.

UVVis spectrum
For Zoom
1.) Enter the desired X axis range (e.g., 100, 200)
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Additional Data

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Source missing citation
Owner INEP CP RAS, NIST OSRD
Collection (C) 2007 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin INSTITUTE OF ENERGY PROBLEMS OF CHEMICAL PHYSICS, RAS
Source reference RAS UV No. 1112
Instrument Zeiss PMQII
Melting point -41.6
Boiling point 115.2

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Hubbard, Frow, et al., 1961
Hubbard, W.N.; Frow, F.R.; Waddington, G., The heats of combustion and formation of pyridine and hippuric acid, J. Phys. Chem., 1961, 65, 1326-1328. [all data]

Andon, Cox, et al., 1957
Andon, R.J.L.; Cox, J.D.; Herington, E.F.G.; Martin, J.F., The second virial coefficients of pyridine and benzene, and certain of their methyl homologues, Trans. Faraday Soc., 1957, 53, 1074. [all data]

Cox, Challoner, et al., 1954
Cox, J.D.; Challoner, A.R.; Meetham, A.R., The heats of combustion of pyridine and certain of its derivatives, J. Chem. Soc., 1954, 265-271. [all data]

Constam and White, 1903
Constam, E.J.; White, J., Physico-chemical investigations in the pyridine series, Am. Chem. J., 1903, 29, 1-49. [all data]

Strepikheev, Baranov, et al., 1962
Strepikheev, Yu.A.; Baranov, Yu.I.; Burmistrova, O.A., Determination of the heats of combustion and the heat capacities of several mono- and di-isocyanates, Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol., 1962, 5, 387-390. [all data]

McCullough, Douslin, et al., 1957
McCullough, J.P.; Douslin, D.R.; Messerly, J.F.; Hossenlopp, I.A.; Kincheloe, T.C.; Waddington, G., Pyridine: experimental and calculated chemical thermodynamic properties between 0 and 1500 K., a revised vibrational assignment, J. Am. Chem. Soc., 1957, 79, 4289-4295. [all data]

Parks, Todd, et al., 1936
Parks, G.S.; Todd, S.S.; Moore, W.A., Thermal data on organic compounds. XVI. Some heat capacity, entropy and free energy data for typical benzene derivatives and heterocyclic compounds, J. Am. Chem. Soc., 1936, 58, 398-401. [all data]

Pearce and Bakke, 1936
Pearce, J.N.; Bakke, H.M., The heat capacity and the free energy of formation of pyridine, Proc. Iowa Acad. Sci., 1936, 43, 171-174. [all data]

Rastorguev and Ganiev, 1967
Rastorguev, Yu.L.; Ganiev, Yu.A., Study of the heat capacity of selected solvents, Izv. Vyssh. Uchebn. Zaved. Neft Gaz. 10, 1967, No.1, 79-82. [all data]

Swietoslawski and Zielenkiewicz, 1958
Swietoslawski, W.; Zielenkiewicz, A., Mean specific heat of some ternary azeotropes, Bull. Acad. Pol. Sci. Ser. Sci. Chim., 1958, 6, 365-366. [all data]

Radulescu and Jula, 1934
Radulescu, D.; Jula, O., Beiträge zur Bestimmung der Abstufung der Polarität des Aminstickstoffes in den organischen Verbindungen, Z. Phys. Chem., 1934, B26, 390-393. [all data]

Swietoslawski, Tybicka, et al., 1931
Swietoslawski, W.; Tybicka, S.; Solodkowska, W., Sur un microcalorimetre adiabatique, adapte aux mesures de la chaleur specifique de substances solides et liquides, Bull. Int. Acad. Pol. Sci. Lett. Cl. Sci. Math Nat. Ser A, 1931, 1931, 322-335. [all data]

Swietoslawski, Tybicka, et al., 1931, 2
Swietoslawski, W.; Tybicka, S.; Solodkowska, W., Sur un microcalorimetre adiabatique, adapte aux mesures de la chaleur specifique de substances solides et liquides, Rocz. Chem., 1931, 11, 65-77. [all data]

Mathews, Krause, et al., 1917
Mathews, J.H.; Krause, E.L.; Bohnson, B.L., a contribution to the thermal chemistry of pyridine, J. Am. Chem. Soc., 1917, 39, 398-413. [all data]

Bramley, 1916
Bramley, A., The study of binary mixtures. Part IV. Heats of reaction and specific heats, J. Chem. Soc. (London), 1916, 109, 496-515. [all data]

Helm, Lanum, et al., 1958
Helm, R.V.; Lanum, W.J.; Cook, G.L.; Ball, J.S., Purification and Properties of Pyrrole, Pyrrolidine, Pyridine and 2-Methylpyridine, J. Phys. Chem., 1958, 62, 858. [all data]

McCullough, Douslin, et al., 1957, 2
McCullough, J.P.; Douslin, D.R.; Messerly, J.F.; Hossenlopp, I.A.; Kincheloe, T.C.; Waddington, G., Pyridine: Experimental and Calculated Chemical Thermodynamic Prop- erties Between 0 and 1500 K; A Revised Vibrational Assignment, J. Am. Chem. Soc., 1957, 79, 4289. [all data]

Brunner, 1987
Brunner, E., Fluid mixtures at high pressures VI. Phase separation and critical phenomina in 18 binary mixtures containing either pyridine or ethanoic acid, J. Chem. Thermodyn., 1987, 19, 823. [all data]

Kobe, Ravicz, et al., 1956
Kobe, K.A.; Ravicz, A.E.; Vohra, S.P., Critical Properties and Vapor Pressures of Some Ethers and Heterocyclic Compounds, J. Chem. Eng. Data, 1956, 1, 50. [all data]

Herz and Neukirch, 1923
Herz, W.; Neukirch, E., On Knowldge of the Critical State, Z. Phys. Chem., Stoechiom. Verwandtschaftsl., 1923, 104, 433-50. [all data]

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]

Ukraintseva, Soldatov, et al., 1997
Ukraintseva, E.A.; Soldatov, D.V.; Dyadin, Yu.A., Pyridine vapor pressure and thermodynamic parameters of clathrate and complex formation in the pyridine-zinc nitrate system, Zh. Neorg. Khim., 1997, 42, 2, 283. [all data]

Blanco, Beltran, et al., 1994
Blanco, Beatriz; Beltran, Sagrario; Cabezas, Jose Luis; Coca, Jose, Vapor-liquid equilibria of coal-derived liquids. 3. Binary systems with tetralin at 200 mm mercury, J. Chem. Eng. Data, 1994, 39, 1, 23-26, https://doi.org/10.1021/je00013a007 . [all data]

Lencka, 1990
Lencka, Malgorzata, Measurements of the vapour pressures of pyridine, 2-methylpyridine, 2,4-dimethylpyridine, 2,6-dimethylpyridine, and 2,4,6-trimethylpyridine from 0.1 kPa to atmospheric pressure using a modified Swietoslawski ebulliometer, The Journal of Chemical Thermodynamics, 1990, 22, 5, 473-480, https://doi.org/10.1016/0021-9614(90)90139-H . [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Michou-Saucet, Jose, et al., 1986
Michou-Saucet, Marie-Annie; Jose, Jacques; Michou-Saucet, Christian, Equilibre liquide-vapeur isotherme des systemes pyridine-n-hexane et pyridine-n-heptane, Thermochimica Acta, 1986, 102, 271-279, https://doi.org/10.1016/0040-6031(86)85335-7 . [all data]

Majer, Svoboda, et al., 1984
Majer, V.; Svoboda, V.; Lencka, M., Enthalpies of vaporization and cohesive energies of pyridine and isomeric methylpyridines, J. Chem. Thermodyn., 1984, 16, 1019-1024. [all data]

Herington and Martin, 1953
Herington, E.F.G.; Martin, J.F., Vapour pressures of pyridine and its homologues, Trans. Faraday Soc., 1953, 49, 154, https://doi.org/10.1039/tf9534900154 . [all data]

Meulen and Mann, 1931
Meulen, P.A. van der.; Mann, Russell F., THE VAPOR PRESSURE OF PYRIDINE, J. Am. Chem. Soc., 1931, 53, 2, 451-453, https://doi.org/10.1021/ja01353a006 . [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

Schafman and Wenthold, 2007
Schafman, B.S.; Wenthold, P.G., Regioselectivity of pyridine deprotonation in the gas phase, J. Org. Chem., 2007, 72, 5, 1645-1651, https://doi.org/10.1021/jo062117x . [all data]

Meot-ner and Kafafi, 1988
Meot-ner, M.; Kafafi, S.A., Carbon Acidities of Aromatic Compounds, J. Am. Chem. Soc., 1988, 110, 19, 6297, https://doi.org/10.1021/ja00227a003 . [all data]

Kiefer, Zhang, et al., 1997
Kiefer, J.H.; Zhang, Q.; Kern, R.D.; Yao, J.; Jursic, B., Pyrolysis of Aromatic Azines: Pyrazine, Pyrimidine, and Pyridine, J. Phys. Chem. A, 1997, 101, 38, 7061, https://doi.org/10.1021/jp970211z . [all data]

DePuy, Kass, et al., 1988
DePuy, C.H.; Kass, S.R.; Bean, G.P., Formation and Reactions of Heteroaromatic Anions in the Gas Phase, J. Org. Chem., 1988, 53, 19, 4427, https://doi.org/10.1021/jo00254a001 . [all data]

Bruins, Ferrer-Correia, et al., 1978
Bruins, A.P.; Ferrer-Correia, A.J.; Harrison, A.G.; Jennings, K.R.; Mithcum, R.K., Negative ion chemical ionization mass spectrometry of some aromatic compounds using O-. as the reagent ion, Adv. Mass Spectrom., 1978, 7, 355. [all data]

Meot-Ner (Mautner), 1992
Meot-Ner (Mautner), M., Intermolecular Forces in Organic Clusters, J. Am. Chem. Soc., 1992, 114, 9, 3312, https://doi.org/10.1021/ja00035a024 . [all data]

Meot-Ner M. and Sieck, 1983
Meot-Ner M.; Sieck, L.W., The Ionic Hydrogen Bond. 1. Sterically Hindered Bonds. Solvation and Clustering of Sterically Hindered Amines and Pyridines, J. Am. Chem. Soc., 1983, 105, 10, 2956, https://doi.org/10.1021/ja00348a005 . [all data]

Holland and Castleman, 1982
Holland, P.M.; Castleman, A.W., The Thermochemical Properties of Gas - Phase Transition Metal Ion Complexes, J. Chem. Phys., 1982, 76, 8, 4195, https://doi.org/10.1063/1.443497 . [all data]

Meot-Ner (Mautner), 1979
Meot-Ner (Mautner), M., Ion Thermochemistry of Low Volatility Compounds in the Gas Phase. II. Intrinsic Basicities and Hydrogen Bonded Dimers of Nitrogen Heterocyclics and Nucleic Bases, J. Am. Chem. Soc., 1979, 101, 9, 2396, https://doi.org/10.1021/ja00503a027 . [all data]

Hales and Herington, 1957
Hales, J.L.; Herington, E.F.G., Equilibrium between pyridine and piperidine, Trans. Faraday Soc., 1957, 53, 616-622. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Burrows and King, 1935
Burrows, G.H.; King, L.A., Jr., The free energy change that accompanies hydrogenation of pyridine to piperidine, J. Am. Chem. Soc., 1935, 57, 1789-1791. [all data]

Hiraoka, Mizuse, et al., 1988
Hiraoka, K.; Mizuse, S.; Yamabe, S., Determination of the Stabilities and Structures of X-(C6H6) Clusters (X = Cl, Br, and I), Chem. Phys. Lett., 1988, 147, 2-3, 174, https://doi.org/10.1016/0009-2614(88)85078-4 . [all data]

Amunugama and Rodgers, 2000
Amunugama, R.; Rodgers, M.T., Absolute Alkali Metal Ion Binding Affinities of Several Azines Determined by Threshold Collision-Induced Dissociation and Ab Initio Theory, Int. J. Mass Spectrom., 2000, 195/196, 439, https://doi.org/10.1016/S1387-3806(99)00145-1 . [all data]

Staley and Beauchamp, 1975
Staley, R.H.; Beauchamp, J.L., Intrinsic Acid - Base Properties of Molecules. Binding Energies of Li+ to pi - and n - Donor Bases, J. Am. Chem. Soc., 1975, 97, 20, 5920, https://doi.org/10.1021/ja00853a050 . [all data]

Dzidic and Kebarle, 1970
Dzidic, I.; Kebarle, P., Hydration of the Alkali Ions in the Gas Phase. Enthalpies and Entropies of Reactions M+(H2O)n-1 + H2O = M+(H2O)n, J. Phys. Chem., 1970, 74, 7, 1466, https://doi.org/10.1021/j100702a013 . [all data]

Davidson and Kebarle, 1976
Davidson, W.R.; Kebarle, P., Binding Energies and Stabilities of Potassium Ion Complexes from Studies of Gas Phase Ion Equilibria K+ + M = K+.M, J. Am. Chem. Soc., 1976, 98, 20, 6133, https://doi.org/10.1021/ja00436a011 . [all data]

Le Barbu, Schiedt, et al., 2002
Le Barbu, K.; Schiedt, J.; Weinkauf, R.; Schlag, E.W.; Nilles, J.M.; Xu, S.J.; Thomas, O.C.; Bowen, K.H., Microsolvation of small anions by aromatic molecules: An exploratory study, J. Chem. Phys., 2002, 116, 22, 9663-9671, https://doi.org/10.1063/1.1475750 . [all data]

Shaofeng and Pilcher, 1988
Shaofeng, L.; Pilcher, G., Enthalpy of formation of pyridine-N-oxide: the dissociation enthalpy of the (N-O) bond, J. Chem. Thermodyn., 1988, 20, 463-465. [all data]

Rodgers, Stanley, et al., 2000
Rodgers, M.T.; Stanley, J.R.; Amunugama, R., Periodic Trends in the Binding of Metal Ions to Pyridine Studied by Threshold Collision-Induced Dissociation and Density Functional Theory, J. Am. Chem. Soc., 2000, 122, 44, 10969, https://doi.org/10.1021/ja0027923 . [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Wind, Papp, et al., 2005
Wind, J.J.; Papp, L.; Happel, M.; Hahn, K.; Andriole, E.J.; Poutsma, J.C., Proton Affinity of beta-Oxalylaminoalanine (BOAA): Incorporation of Direct Entropy Correction into the Single-Reference Kinetic Method, J. Am. Soc. Mass Spectrom., 2005, 16, 1151. [all data]

Arimura and Yoshikawa, 1984
Arimura, M.; Yoshikawa, Y., Ionization efficiency and ionization energy of cyclic compounds by electron impact, Mass Spectrosc. (Tokyo), 1984, 32, 375. [all data]

Lifshitz, 1982
Lifshitz, C., Time-dependent mass spectra and breakdown graphs. 2. The kinetic shift in pyridine, J. Phys. Chem., 1982, 86, 606. [all data]

Kimura, Katsumata, et al., 1981
Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S., Ionization energies, Ab initio assignments, and valence electronic structure for 200 molecules in Handbook of HeI Photoelectron Spectra of Fundamental Organic Compounds, Japan Scientific Soc. Press, Tokyo, 1981. [all data]

Utsunomiya, Kobayashi, et al., 1978
Utsunomiya, C.; Kobayashi, T.; Nagakura, S., Photoelectron angular distribution measurements for some pyridines, Bull. Chem. Soc. Jpn., 1978, 451, 3482. [all data]

Eland, Berkowitz, et al., 1978
Eland, J.H.D.; Berkowitz, J.; Schulte, H.; Frey, R., Rates of unimolecular pyridine ion decay and the heat of formation of C4H4+, Int. J. Mass Spectrom. Ion Phys., 1978, 28, 297. [all data]

Zaretskii, Oren, et al., 1976
Zaretskii, Z.V.I.; Oren, D.; Kelner, L., Automatic method for the measurement of the electron impact ionization and appearance potentials, Appl. Spectrosc., 1976, 30, 366. [all data]

Van Veen and Plantenga, 1975
Van Veen, E.H.; Plantenga, F.L., Threshold electron-impact excitation spectrum of pyridine, Chem. Phys. Lett., 1975, 30, 28. [all data]

Stefanovic and Grutzmacher, 1974
Stefanovic, D.; Grutzmacher, H.F., The ionisation potential of some substituted pyridines, Org. Mass Spectrom., 1974, 9, 1052. [all data]

King, Murrell, et al., 1972
King, G.H.; Murrell, J.N.; Suffolk, R.J., The vacuum-ultraviolet photoelectron spectra of fluoropyridines, J. Chem. Soc. Dalton Trans., 1972, 564. [all data]

Johnstone and Mellon, 1972
Johnstone, R.A.W.; Mellon, F.A., Electron-impact ionization and appearance potentials, J. Chem. Soc. Faraday Trans. 2, 1972, 68, 1209. [all data]

Distefano, Foffani, et al., 1971
Distefano, G.; Foffani, A.; Innorta, G.; Pignataro, S., Mass spectrometric study of transition metal complexes with ligands having nitrogen or sulphur as donor atom, Adv. Mass Spectrom., 1971, 5, 696. [all data]

Distefano, Foffani, et al., 1971, 2
Distefano, G.; Foffani, A.; Innorta, G.; Pignataro, S., Electron impact ionization potentials of some manganese, chromium and tungsten organometallic derivatives, Int. J. Mass Spectrom. Ion Phys., 1971, 7, 383. [all data]

Potapov and Sorokin, 1970
Potapov, V.K.; Sorokin, V.V., Investigation of ionic molecular reactions proceeding during photoionization of aromatic compounds and alcohols, Dokl. Akad. Nauk SSSR, 1970, 195, 616, In original 848. [all data]

Goffart, Momigny, et al., 1969
Goffart, C.; Momigny, J.; Natalis, P., Photoionization studies by total ionization measurements and photoelectron spectra. II.Pyridine, Intern. J. Mass Spectrom. lon Phys., 1969, 3, 371. [all data]

Dewar and Worley, 1969
Dewar, M.J.S.; Worley, S.D., Photoelectron spectra of molecules. II.The ionization potentials of azabenzenes and azanaphthalenes, J. Chem. Phys., 1969, 51, 263. [all data]

Al-Joboury and Turner, 1964
Al-Joboury, M.I.; Turner, D.W., Molecular photoelectron spectroscopy. Part II. A summary of ionization potentials, J. Chem. Soc., 1964, 4434. [all data]

Akopyan and Vilesov, 1964
Akopyan, M.E.; Vilesov, F.I., Excited states of positive ions and dissociative photoionization of aromatic amines, Dokl. Akad. Nauk SSSR, 1964, 158, 1386, In original 965. [all data]

Terenin, 1961
Terenin, A., Charge transfer in organic solids, induced by light, Proc. Chem. Soc., London, 1961, 321. [all data]

El-Sayed, Kaaba, et al., 1961
El-Sayed, M.F.A.; Kaaba, M.; Tanaka, Y., Ionization potentials of benzene, hexadeuterobenzene, and pyridine from their observed Rydberg series in the region 600-2000 A, J. Chem. Phys., 1961, 34, 334. [all data]

Watanabe, 1957
Watanabe, K., Ionization potentials of some molecules, J. Chem. Phys., 1957, 26, 542. [all data]

Hustrulid, Kusch, et al., 1938
Hustrulid, A.; Kusch, P.; Tate, J.T., The dissociation of benzene (C6H6), pyridine (C5H5N) and cyclohexane (C6H12) by electron impact, Phys. Rev., 1938, 54, 1037. [all data]

Klasinc, Novak, et al., 1978
Klasinc, L.; Novak, I.; Scholz, M.; Kluge, G., Photoelektronenspektren substituierter Pyridine und Benzole und ihre Interpretation durch die CNDO/SWW-Methode, Croat. Chem. Acta, 1978, 51, 43. [all data]

Kobayashi and Nagakura, 1974
Kobayashi, T.; Nagakura, S., Photoelectron spectra of aminopyridines and cyanopyridines, J. Electron Spectrosc. Relat. Phenom., 1974, 4, 207. [all data]

Batich, Heilbronner, et al., 1973
Batich, C.; Heilbronner, E.; Hornung, V.; Ashe, A.J.; Clark, D.T.; Cobley, U.T.; Kilcast, D.; Scanlan, I., Photoelectron spectra of phosphabenzen, arsabenzene, and stibabenzene, J. Am. Chem. Soc., 1973, 95, 928. [all data]

Heilbronner, Hornung, et al., 1972
Heilbronner, E.; Hornung, V.; Pinkerton, F.H.; Thames, S.F., 31. Photoelectron spectra of azabenzenes and azanaphthalenes: III. The orbital sequence in methyl- and trimethylsilyl- substituted pyridines, Helv. Chim. Acta, 1972, 55, 289. [all data]

Gleiter, Heilbronner, et al., 1970
Gleiter, R.; Heilbronner, E.; Hornung, V., Lone pair interaction in pyridazine, pyrimidine, and pyrazine, Angew. Chem. Int. Ed. Engl., 1970, 9, 901. [all data]

Momigny, Urbain, et al., 1965
Momigny, J.; Urbain, J.; Wankenne, H., Les effets de l'impact electronique sur la pyridine et les diazines isomeres, Bull. Soc. Roy. Sci. Liege, 1965, 34, 337. [all data]

Lifshitz and Malinovich, 1984
Lifshitz, C.; Malinovich, Y., Time resolved photoionization mass spectrometry in the millisecond range, Int. J. Mass Spectrom. Ion Processes, 1984, 60, 99. [all data]

Burgers and Holmes, 1984
Burgers, P.C.; Holmes, J.L., Fragmentation rate constants and appearance energies for reactions having a large kinetic shift and the energy partitioning in their metastable decomposition, Int. J. Mass Spectrom. Ion Processes, 1984, 58, 15. [all data]

Rosenstock, Stockbauer, et al., 1981
Rosenstock, H.M.; Stockbauer, R.; Parr, A.C., Unimolecular kinetis of pyridine ion fragmentation, Int. J. Mass Spectrom. Ion Phys., 1981, 38, 323. [all data]

Rosenstock, McCulloh, et al., 1977
Rosenstock, H.M.; McCulloh, K.E.; Lossing, F.P., On the mechanisms of C6H6 ionization fragmentation, Int. J. Mass Spectrom. Ion Phys., 1977, 25, 327. [all data]

Beynon, Hopkinson, et al., 1969
Beynon, J.H.; Hopkinson, J.A.; Lester, G.R., Mass spectrometry-the appearance potentials of "meta-stable peaks" in some aromatic nitro compounds - a chemical reaction in the mass spectrometer, Intern. J. Mass Spectrom. Ion Phys., 1969, 2, 291. [all data]


Notes

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