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Acetylene

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Gas phase thermochemistry data

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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:
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity Value Units Method Reference Comment
Deltafgas54.190kcal/molReviewChase, 1998Data last reviewed in March, 1961
Deltafgas54.3 ± 0.2kcal/molReviewManion, 2002adopted recommendation of Gurvich, Veyts, et al., 1991; DRB
Deltafgas54.19 ± 0.19kcal/molCcbWagman, Kilpatrick, et al., 1945Unpublished work of E. J. Prosen; ALS
Quantity Value Units Method Reference Comment
gas,1 bar48.023cal/mol*KReviewChase, 1998Data last reviewed in March, 1961

Constant pressure heat capacity of gas

Cp,gas (cal/mol*K) Temperature (K) Reference Comment
7.015100.Gurvich, Veyts, et al., 1989p=1 bar.; GT
8.501200.
10.53298.15
10.56300.
12.04400.
13.09500.
13.89600.
14.57700.
15.18800.
15.73900.
16.241000.
16.711100.
17.131200.
17.521300.
17.871400.
18.181500.
18.471600.
18.731700.
18.961800.
19.171900.
19.362000.
19.542100.
19.702200.
19.842300.
19.982400.
20.112500.
20.222600.
20.332700.
20.432800.
20.532900.
20.623000.

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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View table.

Temperature (K) 298. - 1100.1100. - 6000.
A 9.72442016.12630
B 9.7353712.808581
C -3.866731-0.483143
D 0.8770890.032551
E -0.157364-2.343790
F 50.3601144.32481
G 56.1675960.59601
H 54.1901154.19011
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in March, 1961 Data last reviewed in March, 1961

Phase change data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, Gas Chromatography, NIST Free Links, 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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny, director
AC - William E. Acree, Jr., James S. Chickos
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis

Quantity Value Units Method Reference Comment
Tboil189.KN/ABuckingham and Donaghy, 1982BS
Tboil189.6KN/AMaass and Wright, 1921Uncertainty assigned by TRC = 0.3 K; TRC
Quantity Value Units Method Reference Comment
Tfus171.65KN/AMorehouse and Maass, 1931Uncertainty assigned by TRC = 0.5 K; TRC
Tfus191.4KN/AMaass and Russell, 1918Uncertainty assigned by TRC = 1. K; TRC
Tfus191.65KN/AMcIntosh, 1907Uncertainty assigned by TRC = 0.5 K; TRC
Quantity Value Units Method Reference Comment
Ttriple192.4KN/AClark and Din, 1950Uncertainty assigned by TRC = 0.5 K; TRC
Ttriple191.35KN/AMaass and Wright, 1921Uncertainty assigned by TRC = 0.3 K; TRC
Quantity Value Units Method Reference Comment
Ptriple1.2657atmN/AClark and Din, 1950Uncertainty assigned by TRC = 0.0038 atm; TRC
Quantity Value Units Method Reference Comment
Tc308.3 ± 0.1KN/ATsonopoulos and Ambrose, 1996 
Tc308.35KN/AGoloborod'ko and Khodeeva, 1972Visual, as Goloborod'ko and Khodeeva Zh.Fiz.Khim. 1969,43,1340; TRC
Tc308.66KN/AKhodeeva, 1966TRC
Tc309.7KN/AMaass and Wright, 1921Uncertainty assigned by TRC = 0.6 K; TRC
Quantity Value Units Method Reference Comment
Pc60.58 ± 0.099atmN/ATsonopoulos and Ambrose, 1996 
Quantity Value Units Method Reference Comment
Vc0.1122l/molN/ATsonopoulos and Ambrose, 1996 
Vc0.113l/molN/AKhodeeva, 1966Visual, samples thoroughly purified; TRC
Quantity Value Units Method Reference Comment
rhoc8.91 ± 0.010mol/lN/ATsonopoulos and Ambrose, 1996 

Enthalpy of vaporization

DeltavapH (kcal/mol) Temperature (K) Method Reference Comment
3.90273.AStephenson and Malanowski, 1987Based on data from 258. - 308. K.; AC
3.99207.AStephenson and Malanowski, 1987Based on data from 192. - 308. K.; AC
3.99210.AStephenson and Malanowski, 1987Based on data from 192. - 225. K.; AC
4.06214.N/AReid, 1972AC
3.92230.N/AAmbrose and Townsend, 1964Based on data from 215. - 308. K.; AC
4.02200.N/AAmbrose, 1956Based on data from 193. - 207. K. See also Boublik, Fried, et al., 1984.; AC

Antoine Equation Parameters

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

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Temperature (K) A B C Reference Comment
214.64 - 308.334.65570909.0797.947Ambrose and Townsend, 1964, 2Coefficents calculated by NIST from author's data.
192.59 - 206.304.19027699.53-21.47Ambrose, 1956, 2Coefficents calculated by NIST from author's data.

Enthalpy of sublimation

DeltasubH (kcal/mol) Temperature (K) Method Reference Comment
5.62130.AStephenson and Malanowski, 1987Based on data from 98. - 145. K.; AC
5.21162.N/AJones, 1960Based on data from 133. - 191. K.; AC
6.02193.N/AAmbrose, 1956Based on data from 151. - 193. K.; AC
5.43160.AStull, 1947Based on data from 130. - 189. K.; AC
5.28129.ABurbo, 1943Based on data from 89. - 169. K.; AC

Enthalpy of fusion

DeltafusH (kcal/mol) Temperature (K) Reference Comment
0.899192.4Miskiewicz, Rieser, et al., 2010AC

Entropy of fusion

DeltafusS (cal/mol*K) Temperature (K) Reference Comment
4.25142.7Miskiewicz, Rieser, et al., 1976CAL
4.66192.4

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, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, Gas Chromatography, NIST Free Links, 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
RCD - Robert C. Dunbar
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
MS - José A. Martinho Simões

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

C2H- + Hydrogen cation = Acetylene

By formula: C2H- + H+ = C2H2

Quantity Value Units Method Reference Comment
Deltar379. ± 5.kcal/molAVGN/AAverage of 8 values; Individual data points
Quantity Value Units Method Reference Comment
Deltar370. ± 5.kcal/molAVGN/AAverage of 7 values; Individual data points

COS+ + Acetylene = (COS+ bullet Acetylene)

By formula: COS+ + C2H2 = (COS+ bullet C2H2)

Quantity Value Units Method Reference Comment
Deltar27.7kcal/molPD/KERDGraul S.T. and Bowers, 1991gas phase; «DELTA»rH>=; M
Deltar34.kcal/molPDissOrlando, Friedman, et al., 1990gas phase; M
Deltar34.kcal/molPDissOrlando, Friedman, et al., 1990gas phase; M
Deltar33.7 ± 5.3kcal/molPDissOrlando, Friedman, et al., 1990gas phase; «DELTA»rH<; M

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

By formula: Co+ + C2H2 = (Co+ bullet C2H2)

Quantity Value Units Method Reference Comment
Deltar43.0 ± 1.9kcal/molIRMPDSurya, Ranatunga, et al., 1997RCD

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
6.5 (+3.1,-0.) CIDArmentrout and Kickel, 1994gas phase; «DELTA»rH >=, guided ion beam CID; M

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

By formula: Ni+ + C2H2 = (Ni+ bullet C2H2)

Quantity Value Units Method Reference Comment
Deltar44.9 ± 1.9kcal/molIRMPDSurya, Ranatunga, et al., 1997RCD

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
1.7 (+4.3,-0.) CIDArmentrout and Kickel, 1994gas phase; «DELTA»rH>=, guided ion beam CID; M

2Hydrogen + Acetylene = Ethane

By formula: 2H2 + C2H2 = C2H6

Quantity Value Units Method Reference Comment
Deltar-74.58 ± 0.15kcal/molChydConn, Kistiakowsky, et al., 1939gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -75.06 ± 0.66 kcal/mol; At 355 K; ALS

2,5-Norbornadiene = 1,3-Cyclopentadiene + Acetylene

By formula: C7H8 = C5H6 + C2H2

Quantity Value Units Method Reference Comment
Deltar28.00 ± 0.50kcal/molKinWalsh and Wells, 1975gas phase; Reanalyzed by Pedley, Naylor, et al., 1986, Original value = 28.36 ± 0.32 kcal/mol; ALS

C2Na2 (cr) + 2Water (l) = 2(Sodium hydroxide bullet 1418Water) (solution) + Acetylene (g)

By formula: C2Na2 (cr) + 2H2O (l) = 2(HNaO bullet 1418H2O) (solution) + C2H2 (g)

Quantity Value Units Method Reference Comment
Deltar-38.67 ± 0.36kcal/molRSCJohnson, van Deventer, et al., 1973Please also see Pedley and Rylance, 1977.; MS

C2HCs (cr) + Water (l) = (Cesium hydroxide bullet 1031Water) (solution) + Acetylene (g)

By formula: C2HCs (cr) + H2O (l) = (HCsO bullet 1031H2O) (solution) + C2H2 (g)

Quantity Value Units Method Reference Comment
Deltar-12.9 ± 0.2kcal/molRSCAder and Hubbard, 1973Please also see Pedley and Rylance, 1977.; MS

C2HNa (cr) + Water (l) = (Sodium hydroxide bullet 1418Water) (solution) + Acetylene (g)

By formula: C2HNa (cr) + H2O (l) = (HNaO bullet 1418H2O) (solution) + C2H2 (g)

Quantity Value Units Method Reference Comment
Deltar-13.0 ± 0.2kcal/molRSCJohnson, van Deventer, et al., 1973Please also see Pedley and Rylance, 1977.; MS

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

By formula: Cu+ + C2H2 = (Cu+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
2.4 (+2.4,-0.) CIDArmentrout and Kickel, 1994gas phase; «DELTA»rH>=, guided ion beam CID; M

2Acetylene = 1-Buten-3-yne

By formula: 2C2H2 = C4H4

Quantity Value Units Method Reference Comment
Deltar55.8kcal/molCmReppe, Schlichting, et al., 1948liquid phase; ALS
Deltar49.6kcal/molCmReppe, Schlichting, et al., 1948gas phase; ALS

Rh+ + Acetylene = (Rh+ bullet Acetylene)

By formula: Rh+ + C2H2 = (Rh+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
30.9 CIDChen and Armetrout, 1995gas phase; «DELTA»rH>=, guided ion beam CID; M

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

By formula: Cr+ + C2H2 = (Cr+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
44.0 (+4.8,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

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

By formula: Ti+ + C2H2 = (Ti+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
60.5 (+4.8,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

Lanthanum ion (1+) + Acetylene = (Lanthanum ion (1+) bullet Acetylene)

By formula: La+ + C2H2 = (La+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
62.6 (+7.2,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

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

By formula: Sc+ + C2H2 = (Sc+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
57.4 (+4.8,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

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

By formula: V+ + C2H2 = (V+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
49.0 (+4.8,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

Yttrium ion (1+) + Acetylene = (Yttrium ion (1+) bullet Acetylene)

By formula: Y+ + C2H2 = (Y+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
60.5 (+7.2,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

Bromine anion + Acetylene = C2H2Br-

By formula: Br- + C2H2 = C2H2Br-

Quantity Value Units Method Reference Comment
Deltar8.60kcal/molLPESWild, Milley, et al., 2000gas phase; Given: 8.635±0.009 kcal/mol(0 K); B

C2Ag2 (cr) + 2(Hydrogen chloride bullet 12.3Water) (solution) = Acetylene (aq) + 2Silver chloride (cr)

By formula: C2Ag2 (cr) + 2(HCl bullet 12.3H2O) (solution) = C2H2 (aq) + 2AgCl (cr)

Quantity Value Units Method Reference Comment
Deltar-18.6 ± 0.1kcal/molRSCFinch, Gardner, et al., 1991MS

(CAS Reg. No. 25012-81-1 bullet 4294967295Acetylene) + Acetylene = CAS Reg. No. 25012-81-1

By formula: (CAS Reg. No. 25012-81-1 bullet 4294967295C2H2) + C2H2 = CAS Reg. No. 25012-81-1

Quantity Value Units Method Reference Comment
Deltar33.02 ± 0.72kcal/molN/AErvin, Gronert, et al., 1990gas phase; B

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

By formula: Al+ + C2H2 = (Al+ bullet C2H2)

Quantity Value Units Method Reference Comment
Deltar13.0 ± 2.0kcal/molCIDC,EqGStockigt, Schwarz, et al., 1996Anchored to theory; RCD

Ethylene, 1,2-dichloro-, (Z)- = Acetylene + Chlorine

By formula: C2H2Cl2 = C2H2 + Cl2

Quantity Value Units Method Reference Comment
Deltar5.1kcal/molKinLaursen and Pimentel, 1989gas phase; Photolyses; ALS

Ethene, chloro- = Acetylene + Hydrogen chloride

By formula: C2H3Cl = C2H2 + HCl

Quantity Value Units Method Reference Comment
Deltar24.06 ± 0.28kcal/molCmLacher, Gottlieb, et al., 1962gas phase; ALS

1,3-Cyclopentadiene + Acetylene = 2,5-Norbornadiene

By formula: C5H6 + C2H2 = C7H8

Quantity Value Units Method Reference Comment
Deltar-28.0 ± 0.5kcal/molEqkWalsh and Wells, 1975gas phase; ALS

C2H2+ + Acetylene = (C2H2+ bullet Acetylene)

By formula: C2H2+ + C2H2 = (C2H2+ bullet C2H2)

Quantity Value Units Method Reference Comment
Deltar22.6kcal/molPIOno and Ng, 1982gas phase; M

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

By formula: Fe+ + C2H2 = (Fe+ bullet C2H2)

Quantity Value Units Method Reference Comment
Deltar36.1 ± 1.9kcal/molIRMPDSurya, Ranatunga, et al., 1997RCD

(Z)-1,2-Diiodoethylene = Acetylene + Iodine

By formula: C2H2I2 = C2H2 + I2

Quantity Value Units Method Reference Comment
Deltar19.9kcal/molEqkFuruyama, Golden, et al., 1968gas phase; ALS

C2H2I2 = Acetylene + Iodine

By formula: C2H2I2 = C2H2 + I2

Quantity Value Units Method Reference Comment
Deltar19.9kcal/molEqkFuruyama, Golden, et al., 1968gas phase; ALS

Henry's Law data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, Gas Chromatography, NIST Free Links, 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
0.039 QN/A missing citation give several references for the Henry's law constants but don't assign them to specific species.
0.0411800.LN/A 
0.042 VN/A 

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, Gas Chromatography, NIST Free Links, 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
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
LL - Sharon G. Lias and Joel F. Liebman

View reactions leading to C2H2+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)11.400 ± 0.002eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)153.3kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity147.4kcal/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
11.41 ± 0.01EIPlessis and Marmet, 1986LBLHLM
11.40PIHayaishi, Iwata, et al., 1982LBLHLM
11.4EVALRosmus, Botschwina, et al., 1981LLK
11.40PEKimura, Katsumata, et al., 1981LLK
11.40PEBieri, Schmelzer, et al., 1980LLK
11.4 ± 0.1EISuzuki and Maeda, 1978LLK
11.4 ± 0.1EISuzuki and Maeda, 1977LLK
11.40 ± 0.02PEBieri, Burger, et al., 1977LLK
~11.3EIVan Veen and Plantenga, 1976LLK
11.37 ± 0.05EIReeher, Flesch, et al., 1976LLK
11.403 ± 0.0003PECarlier, Dubois, et al., 1975LLK
11.394 ± 0.005PIParr and Taylor, 1973LLK
11.398 ± 0.005PIDibeler and Walker, 1973LLK
11.40PEBrogli, Heilbronner, et al., 1973LLK
11.39 ± 0.02EILossing, 1970RDSH
11.395 ± 0.015PIOmura, Kaneko, et al., 1969RDSH
11.39 ± 0.05EIWilliams and Hamill, 1968RDSH
11.41 ± 0.01EICollins, Winters, et al., 1968RDSH
11.40 ± 0.01PEBaker and Turner, 1968RDSH
11.400 ± 0.005PIBrehm, 1966RDSH
11.396 ± 0.003PINicholson, 1965RDSH
11.40 ± 0.02EIMelton and Hamill, 1964RDSH
11.406 ± 0.006PIDibeler and Reese, 1964RDSH
11.41 ± 0.01PIWatanabe and Namioka, 1956RDSH
11.2 ± 0.1EIKusch, Hustrulid, et al., 1937RDSH
11.41SPrice, 1935RDSH
11.49PEBieri and Asbrink, 1980Vertical value; LLK
11.43PECavell and Allison, 1978Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C+21.20 ± 0.05CH2EILocht and Davister, 1995LL
C+24. ± 1.?PICooper, Ibuki, et al., 1988LL
C+20.43 ± 0.05CH2EIPlessis and Marmet, 1986LBLHLM
C+22.5 ± 0.3C+2HEISuzuki and Maeda, 1977LLK
C+23.6?EIBloch, 1963RDSH
C+24.5 ± 1.0C+2HEIKusch, Hustrulid, et al., 1937RDSH
CH+20.85 ± 0.05CHEIDavister and Locht, 1995LL
CH+20.54 ± 0.05CHEIPlessis and Marmet, 1986LBLHLM
CH+23.9 ± 0.2C+HEIPlessis and Marmet, 1986LBLHLM
CH+24.1C+HPIHayaishi, Iwata, et al., 1982LBLHLM
CH+20.7 ± 0.1CHPIHayaishi, Iwata, et al., 1982LBLHLM
CH+20.9 ± 0.2CHEISuzuki and Maeda, 1977LLK
CH+21.5 ± 0.2CHEIKloster-Jensen, Pascual, et al., 1970RDSH
CH+21.9CHEIHaney and Franklin, 1968RDSH
CH+22.2 ± 0.5CHEIKusch, Hustrulid, et al., 1937RDSH
CH2+19.74 ± 0.20CEILocht and Davister, 1995LL
CH2+18.17 ± 0.09C-EIPlessis and Marmet, 1986LBLHLM
CH2+19.40 ± 0.12CEIPlessis and Marmet, 1986LBLHLM
CH2+19.4 ± 0.1CPIHayaishi, Iwata, et al., 1982LBLHLM
CH2+20.5 ± 0.2?EISuzuki and Maeda, 1977LLK
CH2+21.CEIFranklin and Munson, 1965RDSH
C2+19. ± 1.H2CIELReid, Ballantine, et al., 1995LL
C2+18.44 ± 0.07H2EILocht and Davister, 1995LL
C2+22.60 ± 0.122HEIPlessis and Marmet, 1986LBLHLM
C2+18.16 ± 0.05H2EIPlessis and Marmet, 1986LBLHLM
C2+18.1 ± 0.1H2PIHayaishi, Iwata, et al., 1982LBLHLM
C2+22.7 ± 0.12HPIHayaishi, Iwata, et al., 1982LBLHLM
C2+19.2 ± 0.2?EISuzuki and Maeda, 1977LLK
C2+23.62H?EIMomigny and Derouane, 1968RDSH
C2+19.5H2EIBloch, 1963RDSH
C2+23.82H?EIBloch, 1963RDSH
C2+22.72H?EIField, Franklin, et al., 1957RDSH
C2+18.2H2EIField, Franklin, et al., 1957RDSH
C2+23.3 ± 0.52H?EICoats and Anderson, 1957RDSH
C2+23.8 ± 0.32HEIKusch, Hustrulid, et al., 1937RDSH
C2H+17.35 ± 0.04HPIPECOServais and Locht, 1995LL
C2H+17.360HPIPECOWeitzel, Mahnert, et al., 1994LL
C2H+17.30 ± 0.08HEIDavister and Locht, 1994LL
C2H+17.33 ± 0.05HPIPECONorwood and Ng, 1989LL
C2H+16.70 ± 0.10HEIPlessis and Marmet, 1986LBLHLM
C2H+16.8 ± 0.1HPIHayaishi, Iwata, et al., 1982LBLHLM
C2H+16.79 ± 0.03HPIOno and Ng, 1981LLK
C2H+17.3HPIPECOEland, 1979LLK
C2H+17.5 ± 0.1HEISuzuki and Maeda, 1977LLK
C2H+17.36 ± 0.01HPIDibeler, Walker, et al., 1973LLK
C2H+17.22HPIBotter, Dibeler, et al., 1966RDSH
C2H+17.3HEIField, Franklin, et al., 1957RDSH
C2H+17.8 ± 0.2HEIKusch, Hustrulid, et al., 1937RDSH
H+18.83 ± 0.23C2HEIDavister and Locht, 1994LL
H+23. ± 1.?PICooper, Ibuki, et al., 1988LL
H+19.35 ± 0.05C2HPIShiromaru, Achiba, et al., 1987LBLHLM
H+20.6 ± 0.3?EISuzuki and Maeda, 1977LLK
H+21.7 ± 1.0C2+HEIKusch, Hustrulid, et al., 1937RDSH
H+25.6 ± 1.0CH+CEIKusch, Hustrulid, et al., 1937RDSH

De-protonation reactions

C2H- + Hydrogen cation = Acetylene

By formula: C2H- + H+ = C2H2

Quantity Value Units Method Reference Comment
Deltar379. ± 5.kcal/molAVGN/AAverage of 8 values; Individual data points
Quantity Value Units Method Reference Comment
Deltar370. ± 5.kcal/molAVGN/AAverage of 7 values; Individual data points

Ion clustering data

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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:
RCD - Robert C. Dunbar
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

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

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

By formula: Al+ + C2H2 = (Al+ bullet C2H2)

Quantity Value Units Method Reference Comment
Deltar13.0 ± 2.0kcal/molCIDC,EqGStockigt, Schwarz, et al., 1996Anchored to theory; RCD

Bromine anion + Acetylene = C2H2Br-

By formula: Br- + C2H2 = C2H2Br-

Quantity Value Units Method Reference Comment
Deltar8.60kcal/molLPESWild, Milley, et al., 2000gas phase; Given: 8.635±0.009 kcal/mol(0 K); B

COS+ + Acetylene = (COS+ bullet Acetylene)

By formula: COS+ + C2H2 = (COS+ bullet C2H2)

Quantity Value Units Method Reference Comment
Deltar27.7kcal/molPD/KERDGraul S.T. and Bowers, 1991gas phase; «DELTA»rH>=; M
Deltar34.kcal/molPDissOrlando, Friedman, et al., 1990gas phase; M
Deltar34.kcal/molPDissOrlando, Friedman, et al., 1990gas phase; M
Deltar33.7 ± 5.3kcal/molPDissOrlando, Friedman, et al., 1990gas phase; «DELTA»rH<; M

C2H2+ + Acetylene = (C2H2+ bullet Acetylene)

By formula: C2H2+ + C2H2 = (C2H2+ bullet C2H2)

Quantity Value Units Method Reference Comment
Deltar22.6kcal/molPIOno and Ng, 1982gas phase; M

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

By formula: Co+ + C2H2 = (Co+ bullet C2H2)

Quantity Value Units Method Reference Comment
Deltar43.0 ± 1.9kcal/molIRMPDSurya, Ranatunga, et al., 1997RCD

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
6.5 (+3.1,-0.) CIDArmentrout and Kickel, 1994gas phase; «DELTA»rH >=, guided ion beam CID; M

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

By formula: Cr+ + C2H2 = (Cr+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
44.0 (+4.8,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

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

By formula: Cu+ + C2H2 = (Cu+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
2.4 (+2.4,-0.) CIDArmentrout and Kickel, 1994gas phase; «DELTA»rH>=, guided ion beam CID; M

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

By formula: Fe+ + C2H2 = (Fe+ bullet C2H2)

Quantity Value Units Method Reference Comment
Deltar36.1 ± 1.9kcal/molIRMPDSurya, Ranatunga, et al., 1997RCD

Lanthanum ion (1+) + Acetylene = (Lanthanum ion (1+) bullet Acetylene)

By formula: La+ + C2H2 = (La+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
62.6 (+7.2,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

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

By formula: Ni+ + C2H2 = (Ni+ bullet C2H2)

Quantity Value Units Method Reference Comment
Deltar44.9 ± 1.9kcal/molIRMPDSurya, Ranatunga, et al., 1997RCD

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
1.7 (+4.3,-0.) CIDArmentrout and Kickel, 1994gas phase; «DELTA»rH>=, guided ion beam CID; M

Rh+ + Acetylene = (Rh+ bullet Acetylene)

By formula: Rh+ + C2H2 = (Rh+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
30.9 CIDChen and Armetrout, 1995gas phase; «DELTA»rH>=, guided ion beam CID; M

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

By formula: Sc+ + C2H2 = (Sc+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
57.4 (+4.8,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

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

By formula: Ti+ + C2H2 = (Ti+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
60.5 (+4.8,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

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

By formula: V+ + C2H2 = (V+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
49.0 (+4.8,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

Yttrium ion (1+) + Acetylene = (Yttrium ion (1+) bullet Acetylene)

By formula: Y+ + C2H2 = (Y+ bullet C2H2)

Enthalpy of reaction

DeltarH° (kcal/mol) T (K) Method Reference Comment
60.5 (+7.2,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

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


Mass spectrum (electron ionization)

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, Vibrational and/or electronic energy levels, Gas Chromatography, NIST Free Links, 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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Additional Data

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Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
NIST MS number 18810

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Vibrational and/or electronic energy levels

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

Data compiled by: Takehiko Shimanouchi

Symmetry:   Dinftyh     Symmetry Number sigma = 2


 Sym.   No   Approximate   Selected Freq.  Infrared   Raman   Comments 
 Species   type of mode   Value   Rating   Value  Phase  Value  Phase

«sigma»g+ 1 CH str 3374  C  ia 3373.7 S gas
«sigma»g+ 2 CC str 1974  C  ia 1973.8 VS gas
«sigma»u+ 3 CH str 3289  B 3294.9 S gas  ia FR(«nu»2+«nu»4+«nu»5)
«sigma»u+ 3 CH str 3289  B 3281.9 VS gas  ia FR(«nu»2+«nu»4+«nu»5)
«pi»g 4 CH bend 612  C  ia 611.8 VW gas
«pi»u 5 CH bend 730  A 730.3 VS gas  ia

Source: Shimanouchi, 1972

Notes

VSVery strong
SStrong
VWVery weak
iaInactive
FRFermi resonance with an overtone or a combination tone indicated in the parentheses.
A0~1 cm-1 uncertainty
B1~3 cm-1 uncertainty
C3~6 cm-1 uncertainty

Gas Chromatography

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), Vibrational and/or electronic energy levels, NIST Free Links, 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

Kovats' RI, non-polar column, isothermal

View large format table.

Column type Active phase Temperature (C) I Reference Comment
PackedSqualane27.155.Hively and Hinton, 1968He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm
PackedSqualane49.157.Hively and Hinton, 1968He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm
PackedSqualane67.156.Hively and Hinton, 1968He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm
PackedSqualane86.156.Hively and Hinton, 1968He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm

Kovats' RI, non-polar column, custom temperature program

View large format table.

Column type Active phase I Reference Comment
CapillaryDB-1195.Hoekman, 199360. m/0.32 mm/1.0 «mu»m, He; Program: -40 C for 12 min; -40 - 125 C at 3 deg.min; 125-185 C at 6 deg/min; 185 - 220 C at 20 deg/min; hold 220 C for 2 min

Normal alkane RI, non-polar column, temperature ramp

View large format table.

Column type Active phase I Reference Comment
CapillaryPetrocol DH182.Supelco, 2012100. m/0.25 mm/0.50 «mu»m, Helium, 20. C @ 15. min, 15. K/min, 220. C @ 30. min
CapillaryOV-101176.Zenkevich, 200525. m/0.20 mm/0.10 «mu»m, N2/He, 6. K/min; Tstart: 50. C; Tend: 250. C

Normal alkane RI, non-polar column, custom temperature program

View large format table.

Column type Active phase I Reference Comment
CapillaryMethyl Silicone156.Chen and Feng, 2007Program: not specified
CapillaryPorapack Q182.Zenkevich and Rodin, 2004Program: not specified
CapillaryMethyl Silicone155.N/AProgram: not specified
CapillarySPB-1165.Flanagan, Streete, et al., 199760. m/0.53 mm/5. «mu»m, He; Program: 40C(6min) => 5C/min => 80C => 10C/min => 200C
CapillarySPB-1165.Strete, Ruprah, et al., 199260. m/0.53 mm/5.0 «mu»m, Helium; Program: 40 0C (6 min) 5 0C/min -> 80 0C 10 0C/min -> 200 0C

References

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), Vibrational and/or electronic energy levels, Gas Chromatography, NIST Free Links, Notes

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

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Manion, 2002
Manion, J.A., Evaluated Enthalpies of Formation of the Stable Closed Shell C1 and C2 Chlorinated Hydrocarbons, J. Phys. Chem. Ref. Data, 2002, 31, 1, 123-172, https://doi.org/10.1063/1.1420703 . [all data]

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Thermodynamic Properties of Individual Substances, 4th edition, Volume 2, Gurvich, L.V.; Veyts, I.V.; Alcock, C.B.;, ed(s)., Hemisphere, New York, 1991. [all data]

Wagman, Kilpatrick, et al., 1945
Wagman, D.D.; Kilpatrick, J.E.; Pitzer, K.S.; Rossini, F.D., Heats, equilibrium constants, and free energies of formation of the acetylene hydrocarbons through the pentynes, to 1,500° K, J. Res. NBS, 1945, 35, 467-496. [all data]

Gurvich, Veyts, et al., 1989
Gurvich, L.V.; Veyts, I.V.; Alcock, C.B., Thermodynamic Properties of Individual Substances, 4th ed.; Vols. 1 and 2, Hemisphere, New York, 1989. [all data]

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Buckingham, J.; Donaghy, S.M., Dictionary of Organic Compounds: Fifth Edition, Chapman and Hall, New York, 1982, 1. [all data]

Maass and Wright, 1921
Maass, O.; Wright, C.H., SOME PHYSICAL PROPERTIES OF HYDROCARBONS CONTAINING TWO AND THREE CARBON ATOMS., J. Am. Chem. Soc., 1921, 43, 5, 1098-1111, https://doi.org/10.1021/ja01438a013 . [all data]

Morehouse and Maass, 1931
Morehouse, F.R.; Maass, O., The Preparationa and Physical Properties of Ethyl and Methyl Acetylene, Can. J. Res., 1931, 5, 306. [all data]

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Maass, O.; Russell, J., Unsaturation and molecular compound formation, J. Am. Chem. Soc., 1918, 40, 1561-1573. [all data]

McIntosh, 1907
McIntosh, D., The physical properties of liquid and solid acetylene., J. Phys. Chem., 1907, 11, 306-17. [all data]

Clark and Din, 1950
Clark, A.M.; Din, F., Equilibria Between Solid, Liquid, and Gaseous Phases at Low Temperature binary systems acetylene - carbon dioxide, acetylene - ethylene and acetylene - ethane, Trans. Faraday Soc., 1950, 46, 901. [all data]

Tsonopoulos and Ambrose, 1996
Tsonopoulos, C.; Ambrose, D., Vapor-Liquid Critical Properties of Elements and Compounds. 6. Unsaturated Aliphatic Hydrocarbons, J. Chem. Eng. Data, 1996, 41, 645-656. [all data]

Goloborod'ko and Khodeeva, 1972
Goloborod'ko, N.P.; Khodeeva, S.M., Russ. J. Phys. Chem. (Engl. Transl.), 1972, 46, 235-7. [all data]

Khodeeva, 1966
Khodeeva, S.M., Visual Observation of Gas-Gas Mixture, Russ. J. Phys. Chem. (Engl. Transl.), 1966, 40, 1061-3. [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]

Reid, 1972
Reid, Robert C., Handbook on vapor pressure and heats of vaporization of hydrocarbons and related compounds, R. C. Wilhort and B. J. Zwolinski, Texas A Research Foundation. College Station, Texas(1971). 329 pages.$10.00, AIChE J., 1972, 18, 6, 1278-1278, https://doi.org/10.1002/aic.690180637 . [all data]

Ambrose and Townsend, 1964
Ambrose, D.; Townsend, R., Vapour pressure of acetylene, Trans. Faraday Soc., 1964, 60, 1025, https://doi.org/10.1039/tf9646001025 . [all data]

Ambrose, 1956
Ambrose, D., The vapour pressures and critical temperatures of acetylene and carbon dioxide, Trans. Faraday Soc., 1956, 52, 772, https://doi.org/10.1039/tf9565200772 . [all data]

Boublik, Fried, et al., 1984
Boublik, T.; Fried, V.; Hala, E., The Vapour Pressures of Pure Substances: Selected Values of the Temperature Dependence of the Vapour Pressures of Some Pure Substances in the Normal and Low Pressure Region, 2nd ed., Elsevier, New York, 1984, 972. [all data]

Ambrose and Townsend, 1964, 2
Ambrose, D.; Townsend, R., Vapour Pressure of Acetylene, Trans. Faraday Soc., 1964, 60, 1025-1029, https://doi.org/10.1039/tf9646001025 . [all data]

Ambrose, 1956, 2
Ambrose, D., The Vapour Pressures and Critical Temperatures of Acetylene and Carbon Dioxide, Trans. Faraday Soc., 1956, 52, 772-781, https://doi.org/10.1039/tf9565200772 . [all data]

Jones, 1960
Jones, A.H., Sublimation Pressure Data for Organic Compounds., J. Chem. Eng. Data, 1960, 5, 2, 196-200, https://doi.org/10.1021/je60006a019 . [all data]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

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Miskiewicz, S.; Rieser, K.; Dorfmuller, T., Thermodynamische Untersuchungen an kondensierten Phasen, Ber. Bunsen-Ges. Physik. Chem., 1976, 80, 5, 395, https://doi.org/10.1002/bbpc.19760800504 . [all data]

Graul S.T. and Bowers, 1991
Graul S.T.; Bowers, M.T., Dynamics of Metastable Dissociation and Photodissociation of the Gas Phase Cluster Ion (OCS.C2H2)+, J. Phys. Chem., 1991, 95, 21, 8328, https://doi.org/10.1021/j100174a055 . [all data]

Orlando, Friedman, et al., 1990
Orlando, T.M.; Friedman, A.; Maier, J.P., Photodissociation Spectroscopy of the [OCS C2H2]+ Cluster, J. Chem. Phys., 1990, 92, 12, 7365, https://doi.org/10.1063/1.458222 . [all data]

Surya, Ranatunga, et al., 1997
Surya, P.I.; Ranatunga, D.R.A.; Freiser, B.S., Infrared Multiphoton Dissociation of MC4H6+ [M=Fe, Co or Ni: C4H6=1,3-butadiene or (C2H2)(C2H4), J. Am. Chem. Soc., 1997, 119, 14, 3351, https://doi.org/10.1021/ja963200c . [all data]

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Armentrout, P.B.; Kickel, B.L., Gas Phase Thermochemistry of Transition Metal Ligand Systems: Reassessment of Values and Periodic Trends, in Organometallic Ion Chemistry, B. S. Freiser, ed, 1994. [all data]

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

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Walsh, R.; Wells, J.M., The enthalpy of formation of bicyclo[2,2,1]hepta-2,5-diene. Thermodynamic functions of bicyclo[2,2,1]heptane and bicyclo[2,2,1]hepta-2,5-diene, J. Chem. Thermodyn., 1975, 7, 149-154. [all data]

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Johnson, G.K.; van Deventer, E.H.; Ackerman, J.P.; Hubbard, W.N.; Osborne, D.W.; Flotow, H.L., J. Chem. Thermodyn., 1973, 5, 57. [all data]

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Pedley, J.B.; Rylance, J., Computer Analysed Thermochemical Data: Organic and Organometallic Compounds, University of Sussex, Brigton, 1977. [all data]

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Reppe, W.; Schlichting, O.; Klager, K.; Toepel, T., Cyclisierende Polymerisation von Acetylen I Uber Cyclooctatetraen, Justus Liebigs Ann. Chem., 1948, 1-93. [all data]

Chen and Armetrout, 1995
Chen, Y.M.; Armetrout, P.B., Activation of C2H6, C3H8, and c-C3H6 by Gas-Phase Rh+ and the Thermochemistry of Rh-Ligand Complexes, J. Am. Chem. Soc., 1995, 117, 36, 9291, https://doi.org/10.1021/ja00141a022 . [all data]

Wild, Milley, et al., 2000
Wild, D.A.; Milley, P.J.; Loh, Z.M.; Wolynec, P.P.; Weiser, P.S.; Bieske, E.J., Structural and Energetic Properties of the Br--C2H2 Anion Complex from Rotationally Resolved Mid-infrared Spectra And ab initio Calculations, J. Chem. Phys., 2000, 113, 3, 1075, https://doi.org/10.1063/1.481919 . [all data]

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Finch, A.; Gardner, P.J.; Head, A.J.; Majdi, H.S., Thermochim. Acta, 1991, 180, 325. [all data]

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Ervin, K.M.; Gronert, S.; Barlow, S.E.; Gilles, M.K.; Harrison, A.G.; Bierbaum, V.M.; DePuy, C.H.; Lin, W.C., Bonds Strengths of Ethylene and Acetylene, J. Am. Chem. Soc., 1990, 112, 15, 5750, https://doi.org/10.1021/ja00171a013 . [all data]

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Stockigt, D.; Schwarz, J.; Schwarz, H., Theoretical and Experimental Studies on the Bond Dissociation Energies of Al(methane)+, Al(acetylene)+, Al(ethene)+, and Al(ethane)+, J. Phys. Chem., 1996, 100, 21, 8786, https://doi.org/10.1021/jp960060k . [all data]

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Lacher, J.R.; Gottlieb, H.B.; Park, J.D., Reaction heats of organic compounds. Part 2.-Heat of addition of hydrogen chloride to acetylene, Trans. Faraday Soc., 1962, 58, 2348-2351. [all data]

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Ono, Y.; Ng, C.Y., A Study of the Unimolecular Decomposition of the (C2H2)2+ Complex, J. Chem. Phys., 1982, 77, 6, 2947, https://doi.org/10.1063/1.444216 . [all data]

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Furuyama, S.; Golden, D.M.; Benson, S.W., The thermochemistry of the gas-phase equilibria trans-1,2-diiodoethylene = acetylene + I2 and trans-1,2-diiodoethylene = cis-1,2-diiodoethylene, J. Phys. Chem., 1968, 72, 3204-3208. [all data]

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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]

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Plessis, P.; Marmet, P., Electroionization study of acetylene and fragment ions, Int. J. Mass Spectrom. Ion Processes, 1986, 70, 23. [all data]

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Notes

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