Hydroxylamine

Formula: H₃NO
Molecular weight: 33.0299
IUPAC Standard InChI: InChI=1S/H3NO/c1-2/h2H,1H2
IUPAC Standard InChIKey: AVXURJPOCDRRFD-UHFFFAOYSA-N
CAS Registry Number: 7803-49-8
Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
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Species with the same structure:
- Hyponitrous acid
Other names: NH2OH; Oxammonium; Oxyammonia
Information on this page:
Other data available:
- Phase change data
- Mass spectrum (electron ionization)
Data at other public NIST sites:
- Computational Chemistry Comparison and Benchmark Database
- Gas Phase Kinetics Database
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Gas phase ion energetics data

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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

IE (eV)	Method	Reference	Comment
10.00	PE	Koppel, Molder, et al., 1983	LBLHLM
9.6	PI	Kutina, Goodman, et al., 1982	LBLHLM
10.64	PE	Rademacher and Freckmann, 1980	Vertical value; LLK
10.59	PE	Kimura and Katsumata, 1977	Vertical value; LLK

Appearance energy determinations

Ion	AE (eV)	Other Products	Method	Reference	Comment
HNO⁺	11.51 ± 0.06	H₂	PI	Kutina, Goodman, et al., 1982	LBLHLM
NH₂⁺	13.93 ± 0.03	OH	PI	Kutina, Goodman, et al., 1982	LBLHLM
H₂NO⁺	12.34 ± 0.01	H	PI	Kutina, Goodman, et al., 1982	LBLHLM
NH₃⁺	12.65 ± 0.03	O	PI	Kutina, Goodman, et al., 1982	LBLHLM
NO⁺	13.86 ± 0.05	H₂+H	PI	Kutina, Goodman, et al., 1982	LBLHLM

References

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Koppel, Molder, et al., 1983
Koppel, I.A.; Molder, U.H.; Pikver, R.J., Photoelectron spectra of molecules. I. Alcohols, Org. React. Tartu, 1983, 20, 45. [all data]

Kutina, Goodman, et al., 1982
Kutina, R.E.; Goodman, G.L.; Berkowitz, J., Photoionization mass spectrometry of NH₂OH: Heats of formation of HNO⁺ and NOH⁺, J. Chem. Phys., 1982, 77, 1664. [all data]

Rademacher and Freckmann, 1980
Rademacher, P.; Freckmann, B., Photoelektronen spektren und Konformations-verhalten von Hydroxylamin und Methylhydroxylaminen, J. Electron Spectrosc. Relat. Phenom., 1980, 19, 251. [all data]

Kimura and Katsumata, 1977
Kimura, K.; Katsumata, S., Photoelectron spectroscopic study of hydroxylamine (NH₂OH) o-methylhydroxylamine (NH₂OCH₃), J. Chem. Phys., 1977, 67, 1225. [all data]

Notes

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Symbols used in this document:

AE Appearance energy
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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