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1H-Imidazole

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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

Quantity Value Units Method Reference Comment
Deltafgas30.95kcal/molN/AZaheeruddin and Lodhi, 1991Value computed using «DELTA»fHsolid° value of 60.0 kj/mol from Zaheeruddin and Lodhi, 1991 and «DELTA»subH° value of 69.5 kj/mol from Jimenez, Roux, et al., 1987.; DRB
Deltafgas33.29 ± 0.45kcal/molCmGuthrie and Pike, 1987Heat of hydrolysis; ALS
Deltafgas31.8 ± 0.1kcal/molCcbJimenez, Roux, et al., 1987see Jimenez, Roux, et al., 1986; ALS
Deltafgas30.6 ± 1.8kcal/molCcbBedford, Edmondson, et al., 1962ALS

Condensed 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:
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
Deltafsolid  CcbZaheeruddin and Lodhi, 1991uncertain value: 14.33 kcal/mol; ALS
Deltafsolid11.9 ± 0.1kcal/molCcbJimenez, Roux, et al., 1987see Jimenez, Roux, et al., 1986; ALS
Deltafsolid13.97 ± 0.78kcal/molCcbBedford, Edmondson, et al., 1962Reanalyzed by Cox and Pilcher, 1970, Original value = 14.6 ± 0.8 kcal/mol; ALS
Quantity Value Units Method Reference Comment
Deltacsolid  CcbZaheeruddin and Lodhi, 1991uncertain value: -433.119 kcal/mol; ALS
Deltacsolid-430.7 ± 0.1kcal/molCcbJimenez, Roux, et al., 1987see Jimenez, Roux, et al., 1986; ALS
Deltacsolid-432.75 ± 0.78kcal/molCcbBedford, Edmondson, et al., 1962Reanalyzed by Cox and Pilcher, 1970, Original value = -433.34 ± 0.78 kcal/mol; ALS
Deltacsolid-430.8kcal/molCcbZimmerman and Geisenfelder, 1961ALS

Constant pressure heat capacity of solid

Cp,solid (cal/mol*K) Temperature (K) Reference Comment
19.7298.15Jimenez, Roux, et al., 1987Cp given as 1.21 J/g*K.; DH
21.46300.DeWit, DeKruif, et al., 1983T = 90 to 370 K.; DH
22.6310.DeWit, Offringa, et al., 1983T = 300 to 450 K.; DH

Phase change 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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny, director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil530.2KN/AWeast and Grasselli, 1989BS
Quantity Value Units Method Reference Comment
Tfus363.7KN/AHilgeman, Mouroux, et al., 1989Uncertainty assigned by TRC = 0.4 K; TRC
Tfus361.9KN/ADe Wit, Offringa, et al., 1983Uncertainty assigned by TRC = 0.2 K; TRC
Quantity Value Units Method Reference Comment
Ttriple362.69KN/ADe Wit, De Kruif, et al., 1983Uncertainty assigned by TRC = 0.02 K; TRC
Quantity Value Units Method Reference Comment
Deltasub19. ± 3.kcal/molAVGN/AAverage of 8 values; Individual data points

Enthalpy of sublimation

DeltasubH (kcal/mol) Temperature (K) Method Reference Comment
19.9 ± 0.05300.MEJimenez, Roux, et al., 1987Based on data from 292. - 309. K.; AC
19.3301.ME,TEDe Wit, Van Miltenburg, et al., 1983Based on data from 288. - 310. K.; AC

Enthalpy of fusion

DeltafusH (kcal/mol) Temperature (K) Reference Comment
2.9876363.7Hilgeman, Mouroux, et al., 1989, 2DH
3.0643362.69DeWit, DeKruif, et al., 1983DH
3.0593361.9DeWit, Offringa, et al., 1983DH
3.06361.9Domalski and Hearing, 1996See also De Wit, De Kruif, et al., 1983, 2.; AC

Entropy of fusion

DeltafusS (cal/mol*K) Temperature (K) Reference Comment
8.449362.69DeWit, DeKruif, et al., 1983DH
8.454361.9DeWit, Offringa, et al., 1983DH

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

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

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

imidazolide anion + Hydrogen cation = 1H-Imidazole

By formula: C3H3N2- + H+ = C3H4N2

Quantity Value Units Method Reference Comment
Deltar349.93 ± 0.72kcal/molG+TSGianola, Ichino, et al., 2005gas phase; B
Deltar350.1 ± 2.1kcal/molG+TSTaft, Anvia, et al., 1986gas phase; value altered from reference due to change in acidity scale; B
Quantity Value Units Method Reference Comment
Deltar342.60 ± 0.40kcal/molIMREGianola, Ichino, et al., 2005gas phase; B
Deltar342.8 ± 2.0kcal/molIMRETaft, Anvia, et al., 1986gas phase; value altered from reference due to change in acidity scale; B

Sodium ion (1+) + 1H-Imidazole = (Sodium ion (1+) bullet 1H-Imidazole)

By formula: Na+ + C3H4N2 = (Na+ bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar33.4 ± 1.2kcal/molCIDTHuang and Rodgers, 2002RCD
Deltar33.4 ± 1.3kcal/molCIDTArmentrout and Rodgers, 2000RCD
Deltar33.4 ± 1.2kcal/molCIDTRodgers and Armentrout, 1999RCD

imidazolide anion + 1H-Imidazole = (imidazolide anion bullet 1H-Imidazole)

By formula: C3H3N2- + C3H4N2 = (C3H3N2- bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar26.4kcal/molPHPMSMeot-Ner (Mautner), 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar29.3cal/mol*KPHPMSMeot-Ner (Mautner), 1988gas phase; M

C3H4N2+ + 1H-Imidazole = (C3H4N2+ bullet 1H-Imidazole)

By formula: C3H4N2+ + C3H4N2 = (C3H4N2+ bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar23.7kcal/molPHPMSMeot-Ner (Mautner), 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar21.7cal/mol*KPHPMSMeot-Ner (Mautner), 1988gas phase; M

C4H12N+ + 1H-Imidazole = (C4H12N+ bullet 1H-Imidazole)

By formula: C4H12N+ + C3H4N2 = (C4H12N+ bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar22.6kcal/molPHPMSMeot-Ner (Mautner), 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar21.2cal/mol*KPHPMSMeot-Ner (Mautner), 1988gas phase; M

MeCO2 anion + 1H-Imidazole = (MeCO2 anion bullet 1H-Imidazole)

By formula: C2H3O2- + C3H4N2 = (C2H3O2- bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar27.7kcal/molPHPMSMeot-Ner (Mautner), 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar24.4cal/mol*KPHPMSMeot-Ner (Mautner), 1988gas phase; M

1H-Imidazole, 1-acetyl- + Water = 1H-Imidazole + Acetic acid

By formula: C5H6N2O + H2O = C3H4N2 + C2H4O2

Quantity Value Units Method Reference Comment
Deltar-4.83 ± 0.05kcal/molCmWadso, 1960liquid phase; solvent: Aqueous; Heat of hydrolysis; ALS

Acetylimidazole diethyl acetal + Water = Ethyl Acetate + 1H-Imidazole + Ethanol

By formula: C9H16N2O2 + H2O = C4H8O2 + C3H4N2 + C2H6O

Quantity Value Units Method Reference Comment
Deltar-10.68 ± 0.16kcal/molCmGuthrie and Pike, 1987liquid phase; Heat of hydrolysis; ALS

1-(Dimethoxy-phenylmethyl)-1H-imidazole + Water = 1H-Imidazole + Methyl Alcohol + Benzoic acid, methyl ester

By formula: C12H14N2O2 + H2O = C3H4N2 + CH4O + C8H8O2

Quantity Value Units Method Reference Comment
Deltar-13.26 ± 0.17kcal/molCmGuthrie and Pike, 1987liquid phase; Heat of hydrolysis; ALS

N-Formylimidazole diethyl acetal + Water = Ethyl formate + 1H-Imidazole + Ethanol

By formula: C8H14N2O2 + H2O = C3H6O2 + C3H4N2 + C2H6O

Quantity Value Units Method Reference Comment
Deltar-8.28 ± 0.42kcal/molCmGuthrie and Pike, 1987liquid phase; Heat of hydrolysis; ALS

1-Butanamine + 1H-Imidazole, 1-acetyl- = Acetamide, N-butyl- + 1H-Imidazole

By formula: C4H11N + C5H6N2O = C6H13NO + C3H4N2

Quantity Value Units Method Reference Comment
Deltar-18.07 ± 0.08kcal/molCmWadso, 1962solid phase; ALS

Lithium ion (1+) + 1H-Imidazole = (Lithium ion (1+) bullet 1H-Imidazole)

By formula: Li+ + C3H4N2 = (Li+ bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar50.4 ± 2.3kcal/molCIDTHuang and Rodgers, 2002RCD

Potassium ion (1+) + 1H-Imidazole = (Potassium ion (1+) bullet 1H-Imidazole)

By formula: K+ + C3H4N2 = (K+ bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar26.0 ± 1.3kcal/molCIDTHuang and Rodgers, 2002RCD

Gas phase ion energetics 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 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

Quantity Value Units Method Reference Comment
IE (evaluated)8.81 ± 0.01eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)225.3kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity217.3kcal/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
8.81 ± 0.01PIMain-Bobo, Loesik, et al., 1986LBLHLM
9.12EIKlebe, Houte, et al., 1972LLK
8.96PERamsey, 1979Vertical value; LLK
8.78PECradock, Findlay, et al., 1973Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
CH2N+11.67 ± 0.05C2H2NPIMain-Bobo, Loesik, et al., 1986LBLHLM
C2H2N+13.2HCNEIKlebe, Houte, et al., 1972LLK
C2H3N2+11.48 ± 0.02CHPIMain-Bobo, Loesik, et al., 1986LBLHLM
C3H3N2+12.8HEIKlebe, Houte, et al., 1972LLK

De-protonation reactions

imidazolide anion + Hydrogen cation = 1H-Imidazole

By formula: C3H3N2- + H+ = C3H4N2

Quantity Value Units Method Reference Comment
Deltar349.93 ± 0.72kcal/molG+TSGianola, Ichino, et al., 2005gas phase; B
Deltar350.1 ± 2.1kcal/molG+TSTaft, Anvia, et al., 1986gas phase; value altered from reference due to change in acidity scale; B
Quantity Value Units Method Reference Comment
Deltar342.60 ± 0.40kcal/molIMREGianola, Ichino, et al., 2005gas phase; B
Deltar342.8 ± 2.0kcal/molIMRETaft, Anvia, et al., 1986gas phase; value altered from reference due to change in acidity scale; B

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
RCD - Robert C. Dunbar

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

MeCO2 anion + 1H-Imidazole = (MeCO2 anion bullet 1H-Imidazole)

By formula: C2H3O2- + C3H4N2 = (C2H3O2- bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar27.7kcal/molPHPMSMeot-Ner (Mautner), 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar24.4cal/mol*KPHPMSMeot-Ner (Mautner), 1988gas phase; M

imidazolide anion + 1H-Imidazole = (imidazolide anion bullet 1H-Imidazole)

By formula: C3H3N2- + C3H4N2 = (C3H3N2- bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar26.4kcal/molPHPMSMeot-Ner (Mautner), 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar29.3cal/mol*KPHPMSMeot-Ner (Mautner), 1988gas phase; M

C3H4N2+ + 1H-Imidazole = (C3H4N2+ bullet 1H-Imidazole)

By formula: C3H4N2+ + C3H4N2 = (C3H4N2+ bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar23.7kcal/molPHPMSMeot-Ner (Mautner), 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar21.7cal/mol*KPHPMSMeot-Ner (Mautner), 1988gas phase; M

C4H12N+ + 1H-Imidazole = (C4H12N+ bullet 1H-Imidazole)

By formula: C4H12N+ + C3H4N2 = (C4H12N+ bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar22.6kcal/molPHPMSMeot-Ner (Mautner), 1988gas phase; M
Quantity Value Units Method Reference Comment
Deltar21.2cal/mol*KPHPMSMeot-Ner (Mautner), 1988gas phase; M

Potassium ion (1+) + 1H-Imidazole = (Potassium ion (1+) bullet 1H-Imidazole)

By formula: K+ + C3H4N2 = (K+ bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar26.0 ± 1.3kcal/molCIDTHuang and Rodgers, 2002RCD

Lithium ion (1+) + 1H-Imidazole = (Lithium ion (1+) bullet 1H-Imidazole)

By formula: Li+ + C3H4N2 = (Li+ bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar50.4 ± 2.3kcal/molCIDTHuang and Rodgers, 2002RCD

Sodium ion (1+) + 1H-Imidazole = (Sodium ion (1+) bullet 1H-Imidazole)

By formula: Na+ + C3H4N2 = (Na+ bullet C3H4N2)

Quantity Value Units Method Reference Comment
Deltar33.4 ± 1.2kcal/molCIDTHuang and Rodgers, 2002RCD
Deltar33.4 ± 1.3kcal/molCIDTArmentrout and Rodgers, 2000RCD
Deltar33.4 ± 1.2kcal/molCIDTRodgers and Armentrout, 1999RCD

IR Spectrum

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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: Coblentz Society, Inc.

Condensed Phase Spectrum

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IR spectrum
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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

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Owner COBLENTZ SOC.
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin DOW CHEMICAL COMPANY
Source reference COBLENTZ NO. 06436
Date 1963/01/23
Name(s) 1H-imidazole
State SOLID (SPLIT MULL)
SPECTRAL FEATURE AT 1993 CM-1 IS PROBABLY AN ARTIFACT CAUSED BY GRATING CHANGE
Instrument DOW KBr FOREPRISM-GRATING
Instrument parameters BLAZED AT 3.5, 12.0, 20.0 MICRON AND CHANGED AT 5.0, 7.5, 14.9 MICRON
Resolution 2
Sampling procedure TRANSMISSION
Data processing DIGITIZED BY COBLENTZ SOCIETY (BATCH I) FROM HARD COPY

This IR spectrum is from the Coblentz Society's evaluated infrared reference spectra collection.


Mass spectrum (electron ionization)

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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: 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 NIST Mass Spectrometry Data Center
NIST MS number 353138

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

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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: Victor Talrose, Alexander N. Yermakov, Alexy A. Usov, Antonina A. Goncharova, Axlexander N. Leskin, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

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UVVis spectrum
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Additional Data

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Source Johnson, 1967
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. 19853
Instrument Unicam SP 500
Melting point 90.7-91.3

Gas Chromatography

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, 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

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Column type Active phase Temperature (C) I Reference Comment
CapillaryOV-101110.1069.Zhuravleva, 200050. m/0.3 mm/0.4 «mu»m, He
CapillaryOV-101110.1042.Golovnya, Kuz'menko, et al., 199950. m/0.3 mm/0.4 «mu»m, He
CapillaryOV-101150.1069.Golovnya, Zhuravleva, et al., 199230. m/0.30 mm/0.20 «mu»m

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

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Column type Active phase I Reference Comment
PackedSE-301095.Ramsey, Lee, et al., 1980He, Chromosorb G HP (80-100 mesh); Column length: 1.5 m; Program: not specified

Kovats' RI, polar column, isothermal

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Column type Active phase Temperature (C) I Reference Comment
CapillaryPEG-40M/KF170.2172.Golovnya, Zhuravleva, et al., 199230. m/0.3 mm/0.2 «mu»m

Van Den Dool and Kratz RI, non-polar column, temperature ramp

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Column type Active phase I Reference Comment
PackedSE-301055.Peng, Ding, et al., 1988He, Supelcoport and Chromosorb, 40. C @ 4. min, 10. K/min, 250. C @ 60. min; Column length: 3.05 m

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

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Column type Active phase I Reference Comment
OtherMethyl Silicone1095.Ardrey and Moffat, 1981Program: not specified

Normal alkane RI, polar column, temperature ramp

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Column type Active phase I Reference Comment
CapillaryDB-Wax2200.Wong and Bernhard, 1988He, 70. C @ 8. min, 2. K/min; Column length: 30. m; Column diameter: 0.25 mm; Tend: 160. C

References

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, 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.

Zaheeruddin and Lodhi, 1991
Zaheeruddin, M.; Lodhi, Z.H., Enthalpies of formation of some cyclic compounds, Phys. Chem. (Peshawar Pak.), 1991, 10, 111-118. [all data]

Jimenez, Roux, et al., 1987
Jimenez, P.; Roux, M.V.; Turrion, C., Thermochemical properties of N-heterocyclic compounds. I. Enthalpies of combustion, vapour pressures and enthalpies of sublimation, and enthalpies of formation of pyrazole, imidazole, indazole, and benzimidazole, J. Chem. Thermodyn., 1987, 19, 985-992. [all data]

Guthrie and Pike, 1987
Guthrie, J.P.; Pike, D.C., Hydration of acylimidazoles: tetrahedral intermediates in acylimidazole hydrolysis and nucleophilic attack by imidazole on esters. The question of concerted mechanisms for acyl transfers, Can. J. Chem., 1987, 65, 1951-1969. [all data]

Jimenez, Roux, et al., 1986
Jimenez, P.; Roux, M.V.; Turrion, C.; Gomis, F., Thermochemical properties of some N-heterocyclic compounds, J. Calorim. Anal. Therm. Thermodyn. Chim., 1986, 17, 469-470. [all data]

Bedford, Edmondson, et al., 1962
Bedford, A.F.; Edmondson, P.B.; Mortimer, C.T., Heats of formation and bond energies. Part VI. n-Butyliso-butyraldimine, n-butylisobutylamine, pyrazole, and imidazole, J. Chem. Soc., 1962, 2927-2931. [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]

Zimmerman and Geisenfelder, 1961
Zimmerman, H.; Geisenfelder, H., Uber die Mesomerieenergie von Azolen, Z. Electrochem., 1961, 65, 368-371. [all data]

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Notes

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