Hexamethylphosphoramide

• Formula: C₆H₁₈N₃OP
• Molecular weight: 179.2004
• IUPAC Standard InChI: InChI=1S/C6H18N3OP/c1-7(2)11(10,8(3)4)9(5)6/h1-6H3 Copy

  
• IUPAC Standard InChIKey: GNOIPBMMFNIUFM-UHFFFAOYSA-N Copy
• CAS Registry Number: 680-31-9
• Chemical structure:
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• Other names: Hexamethylphosphoric triamide; Eastman Inhibitor HPT; ENT 50,882; Hexametapol; Hexamethylphosphorotriamide; HEMPA; HMPA; HMPT; HMPTA; HPT; Phosphoric tris(dimethylamide); Phosphoryl hexamethyltriamide; Tris(dimethylamino)phosphine oxide; Phosphoric triamide, hexamethyl-; Hexamethylphosphoric acid triamide; N,N,N',N',N",N"-Hexamethylphosphoric triamide; Hexamethylphosphotriamide; Hexmethylphosphoramide; Hexamethylorthophosphoric triamide; Phosphoric acid hexamethyltriamide; Phosphoric hexamethyltriamide; Tris(dimethylamino)phosphorus oxide; ENT 50882; Hexamethylfosforamid; Tri(dimethylamino)phosphineoxide; Tris-(dimethylamid) kyseliny fosforecne; Hexamethyltriamidophosphate; N,N,N',N',N",N''-Hexamethylphosphorotriamide; NSC 113131; NSC 7967; N,N,N',N',N'',N''-Hexamethylphosphoric triamide; N,N,N',N',N'',N''-Hexamethylphosphorotriamide; N,N,N',N',N",N'-Hexamethylphosphorotriamide
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• Information on this page:
  • Condensed phase thermochemistry data
  • Gas phase ion energetics data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • References
  • Notes
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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 by: Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

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

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

Ionization energy determinations

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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Additional Data

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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Additional Data

References

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

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

Vorob'ev and Yakovlev, 1982
Vorob'ev, A.F.; Yakovlev, P.N., The specific heats of dimethylformamide-water and hexamethylphosphoramide-water mixtures, Zhur. Fiz. Khim., 1982, 56, 1933-1936. [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]

Worley, Hargis, et al., 1982
Worley, S.D.; Hargis, J.H.; Chang, L.; Mattson, G.A.; Jennings, W.B., The UPS of some compounds containing the heteroatoms phosphorus, nitrogen and oxygen, J. Electron Spectrosc. Relat. Phenom., 1982, 25, 135. [all data]

Cowley, Lattman, et al., 1982
Cowley, A.H.; Lattman, M.; Stricklen, P.M.; Verkade, J.G., UV photoelectron spectroscopic investigation of some polycyclic group 5A compounds and related acyclic species. 1. Free and coordinated aminophosphines and related compounds, Inorg. Chem., 1982, 21, 543. [all data]

Vovna, Lopatin, et al., 1975
Vovna, V.I.; Lopatin, S.N.; Pettsol'd, R.; Vilesov, F.I., Photoelectron spectra and electronic structure of some phosphoryl compounds, Khim. Vys. Energ., 1975, 9, 9. [all data]

Notes

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• Symbols used in this document:
  

  Cp,liquid

  Constant pressure heat capacity of liquid

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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