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Hydrazine, 1,1-dimethyl-

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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 by: Donald R. Burgess, Jr.

Quantity Value Units Method Reference Comment
Deltafgas83.3 ± 3.6kJ/molN/ADonovan, Shomate, et al., 1960Value computed using «DELTA»fHliquid° value of 48.3±3.6 kj/mol from Donovan, Shomate, et al., 1960 and «DELTA»vapH° value of 35±0.2 kj/mol from missing citation.

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
Deltafliquid48.3 ± 3.6kJ/molCcbDonovan, Shomate, et al., 1960Reanalyzed by Cox and Pilcher, 1970, Original value = 49.79 kJ/mol; ALS
Quantity Value Units Method Reference Comment
Deltacliquid-1978.7 ± 3.6kJ/molCcbDonovan, Shomate, et al., 1960Reanalyzed by Cox and Pilcher, 1970, Original value = -1980.2 ± 1.8 kJ/mol; ALS
Deltacliquid-1979.7 ± 2.9kJ/molCcbAston, Rock, et al., 1952Reanalyzed by Cox and Pilcher, 1970, Original value = -1977.6 ± 2.9 kJ/mol; ALS
Quantity Value Units Method Reference Comment
liquid200.25J/mol*KN/AAston, Wood, et al., 1953DH

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
164.05298.15Aston, Wood, et al., 1953T = 13 to 300 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, Kenneth Kroenlein director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tboil337.1KN/AWeast and Grasselli, 1989BS
Tboil336.2KN/AMajer and Svoboda, 1985 
Quantity Value Units Method Reference Comment
Tfus216.KN/AMcMillan, 1967Uncertainty assigned by TRC = 1.5 K; TRC
Quantity Value Units Method Reference Comment
Ttriple215.95KN/AAston, Wood, et al., 1953, 2Uncertainty assigned by TRC = 0.02 K; TRC
Quantity Value Units Method Reference Comment
Deltavap35.22kJ/molN/AMajer and Svoboda, 1985 
Deltavap35.0 ± 0.2kJ/molVAston, Wood, et al., 1953, 3ALS

Reduced pressure boiling point

Tboil (K) Pressure (bar) Reference Comment
336.21.00Aldrich Chemical Company Inc., 1990BS

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
35.003298.15N/AAston, Wood, et al., 1953P = 20.90 kPa; DH
32.55336.2N/AMajer and Svoboda, 1985 
34.1284.N/ABourret-Courchesne, Ye, et al., 2000Based on data from 267. - 303. K.; AC
36.5277.AStephenson and Malanowski, 1987Based on data from 238. - 292. K. See also Aston, Wood, et al., 1953 and Boublik, Fried, et al., 1984.; AC

Entropy of vaporization

DeltavapS (J/mol*K) Temperature (K) Reference Comment
117.4298.15Aston, Wood, et al., 1953P; DH

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
237.74 - 293.084.713161388.51-40.613Aston, Wood, et al., 1953Coefficents calculated by NIST from author's data.

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
10.0726215.95Aston, Wood, et al., 1953DH
10.07216.Domalski and Hearing, 1996AC

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
46.64215.95Aston, Wood, et al., 1953DH

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:


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:
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

Quantity Value Units Method Reference Comment
IE (evaluated)7.29 ± 0.05eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)927.1kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity894.7kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
7.29 ± 0.05EQMautner(Meot-Ner), Nelsen, et al., 1984LBLHLM
8.05 ± 0.05PEVovna, Vilesov, et al., 1975LLK
8.28PEBodor, Dewar, et al., 1970RDSH
7.67 ± 0.05PIAkopyan and Vilesov, 1963RDSH
7.46 ± 0.02PIAkopyan, Vilesov, et al., 1963RDSH
8.1 ± 0.1EIDibeler, Franklin, et al., 1959RDSH
8.82PERademacher, 1975Vertical value; LLK
8.85PEKimura, Katsumata, et al., 1975Vertical value; LLK
8.88PENelsen and Buschek, 1974Vertical value; LLK
8.88PENelsen and Buschek, 1974, 2Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C2H7N?+11.2 ± 0.2?PIAkopyan and Vilesov, 1963RDSH
N2H2?+12.9 ± 0.1?EIDibeler, Franklin, et al., 1959RDSH
N2?+13.2 ± 0.1?EIDibeler, Franklin, et al., 1959RDSH
C2H4N?+12.8 ± 0.2?EIDibeler, Franklin, et al., 1959RDSH
CH3+14.5 ± 0.3?EIDibeler, Franklin, et al., 1959RDSH
CH5N2+8.60CH3EIBurgers, Drewello, et al., 1989LL
CH5N2+8.4 ± 0.1CH3PIAkopyan and Vilesov, 1963RDSH
CH5N2+9.7 ± 0.2CH3EIDibeler, Franklin, et al., 1959RDSH
C2H5N+8.8 ± 0.1?PIAkopyan and Vilesov, 1963RDSH
C2H5N+12.5 ± 0.2?EIDibeler, Franklin, et al., 1959RDSH
C2H6N+10.45 ± 0.05?EIFisher and Henderson, 1967RDSH
C2H6N+9.0 ± 0.2?PIAkopyan and Vilesov, 1963RDSH
C2H6N+10.7 ± 0.1?EIGowenlock, Jones, et al., 1961RDSH
C2H6N+10.9 ± 0.2?EIDibeler, Franklin, et al., 1959RDSH
C2H6N2+9.5 ± 0.1H2PIAkopyan and Vilesov, 1963RDSH
C2H7N2+10.1 ± 0.1HEIFoner and Hudson, 1970RDSH
C2H7N2+8.7 ± 0.2HPIAkopyan and Vilesov, 1963RDSH
C2H7N2+10.0 ± 0.3HEIFoner and Hudson, 1962RDSH
C2H7N2+10.2 ± 0.2HEIDibeler, Franklin, et al., 1959RDSH
NH2+13.3 ± 0.1?EIGowenlock, Jones, et al., 1961RDSH
N2H2+8.6 ± 0.1C2H6PIAkopyan and Vilesov, 1963RDSH

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

Gas Phase Spectrum

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IR spectrum
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Additional Data

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Owner NIST Standard Reference Data Program
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Sadtler Research Labs Under US-EPA Contract
State gas

This IR spectrum is from the NIST/EPA Gas-Phase Infrared Database .


Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, IR 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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Mass spectrum
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Additional Data

View image of digitized spectrum (can be printed in landscape orientation).

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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-1126
NIST MS number 229632

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.


Gas Chromatography

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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

Normal alkane RI, non-polar column, temperature ramp

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Column type Active phase I Reference Comment
CapillaryOV-101527.Zenkevich, 200525. m/0.20 mm/0.10 «mu»m, N2/He, 6. K/min; Tstart: 50. C; Tend: 250. C

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), 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.

Donovan, Shomate, et al., 1960
Donovan, T.M.; Shomate, C.H.; McBride, W.R., The heat of combustion of tetramethyltetrazene and 1,1-dimethylhydrazine, J. Phys. Chem., 1960, 64, 281-282. [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]

Aston, Rock, et al., 1952
Aston, J.G.; Rock, E.J.; Isserow, S., The heats of combustion of the methyl substituted hydrazines and some observations on the burning of volatile liquids, J. Am. Chem. Soc., 1952, 74, 2484-24. [all data]

Aston, Wood, et al., 1953
Aston, J.G.; Wood, J.L.; Zolki, T.P., The thermodynamic properties and configuration of unsymmetrical dimethylhydrazine, J. Am. Chem. Soc., 1953, 75, 6202-6204. [all data]

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [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]

McMillan, 1967
McMillan, J.A., Hydrazine-1,1-Dimethylhydrazine Solid-Liquid Phase Diagram, J. Chem. Eng. Data, 1967, 12, 39. [all data]

Aston, Wood, et al., 1953, 2
Aston, J.G.; Wood, J.L.; Zolki, T.P., The Thermodynamic Properties and Configuration of Unsymmetrical Dimethylhydrazine, J. Am. Chem. Soc., 1953, 75, 6202. [all data]

Aston, Wood, et al., 1953, 3
Aston, J.G.; Wood, J.L.; Zolki, T.P., The thermodynamic properties and configuration of unsymmetrical dimethylhydrazine, J. Am. Chem. Soc., 1953, 75, 6202-62. [all data]

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]

Bourret-Courchesne, Ye, et al., 2000
Bourret-Courchesne, E.; Ye, Q.; Peters, D.W.; Arnold, J.; Ahmed, M.; Irvine, S.J.C.; Kanjolia, R.; Smith, L.M.; Rushworth, S.A., Pyrolysis of dimethylhydrazine and its co-pyrolysis with triethylgallium, Journal of Crystal Growth, 2000, 217, 1-2, 47-54, https://doi.org/10.1016/S0022-0248(00)00398-5 . [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]

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]

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]

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]

Mautner(Meot-Ner), Nelsen, et al., 1984
Mautner(Meot-Ner), M.; Nelsen, S.F.; Willi, M.R.; Frigo, T.B., Special effects of an unusually large neutral to radical cation geometry change. Adiabatic ionization energies and proton affinities of alkylhydrazines, J. Am. Chem. Soc., 1984, 106, 7384. [all data]

Vovna, Vilesov, et al., 1975
Vovna, V.I.; Vilesov, F.I.; Lopatin, S.N., Photoelectron spectra of hydrazine and some alkyl derivatives, Opt. Spectrosc., 1975, 38, 143. [all data]

Bodor, Dewar, et al., 1970
Bodor, N.; Dewar, M.J.S.; Jennings, W.B.; Worley, S.D., Photoelectron spectra of molecules-IV.Ionization potentials and heats of formation of some hydrazines and amines, Tetrahedron, 1970, 26, 4109. [all data]

Akopyan and Vilesov, 1963
Akopyan, M.E.; Vilesov, F.I., Decay of the molecular ions formed in photoionization of hydrazine and some of its alkyl derivatives, Kinetika i Kataliz, 1963, 4, 39, In original 32. [all data]

Akopyan, Vilesov, et al., 1963
Akopyan, M.E.; Vilesov, F.I.; Terenin, A.N., Mass spectrometric investigation of photoionization of molecules and dissociation of excited molecular ions, Izv. Akad. Nauk SSSR, Ser. Fiz., 1963, 27, 1083, In original 1054. [all data]

Dibeler, Franklin, et al., 1959
Dibeler, V.H.; Franklin, J.L.; Reese, R.M., Electron impact studies of hydrazine and the methyl-substituted hydrazines, J. Am. Chem. Soc., 1959, 81, 68. [all data]

Rademacher, 1975
Rademacher, P., Acyclische Hydrazine, Chem. Ber., 1975, 108, 1548. [all data]

Kimura, Katsumata, et al., 1975
Kimura, K.; Katsumata, S.; Osafune, K., Photoelectron spectroscopic study of skew compounds. Methylhydrazine and unsymmetrical dimethylhydrazine, Bull. Chem. Soc. Jpn., 1975, 48, 2736. [all data]

Nelsen and Buschek, 1974
Nelsen, S.F.; Buschek, J.M., Photoelectron spectra of hydrazines. IV. Empirical estimation of lone pair-lone pair dihedral angles and prediction of lone pair ionization potentials for some cyclic and bicyclic hydrazines, J. Am. Chem. Soc., 1974, 96, 6982. [all data]

Nelsen and Buschek, 1974, 2
Nelsen, S.F.; Buschek, J.M., Photoelectron spectra of hydrazines. III. Evidence for similar lone pair-lone pair dihedral angles for acyclic hydrazines, J. Am. Chem. Soc., 1974, 96, 2392. [all data]

Burgers, Drewello, et al., 1989
Burgers, P.C.; Drewello, T.; Schwarz, H.; Terlouw, J.K., CH5N2 hydrazyl radicals, cations and dication radicals studied by mass spectrometry. Is the N-protonated formaldehyde hydrazon cation +CH2-NH-NH2 a bridged species?, Int. J. Mass Spectrom. Ion Processes, 1989, 95, 157. [all data]

Fisher and Henderson, 1967
Fisher, I.P.; Henderson, E., Mass spectrometry of free radicals, J. Chem. Soc. Faraday Trans., 1967, 63, 1342. [all data]

Gowenlock, Jones, et al., 1961
Gowenlock, B.G.; Jones, P.P.; Majer, J.R., Bond dissociation energies in some molecules containing alkyl substituted CH3, NH2, and OH, J. Chem. Soc. Faraday Trans., 1961, 57, 23. [all data]

Foner and Hudson, 1970
Foner, S.N.; Hudson, R.L., Mass spectrometric studies of atom-molecule reactions using high-intensity crossed molecular beams, J. Chem. Phys., 1970, 53, 4377. [all data]

Foner and Hudson, 1962
Foner, S.N.; Hudson, R.L., Mass spectrometry of inorganic free radicals, Advan. Chem. Ser., 1962, 36, 34. [all data]

Zenkevich, 2005
Zenkevich, I.G., Experimentally measured retention indices., 2005. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, NIST Free Links, References