2-amino-4-(methylselenyl)butyric acid

Formula: C₅H₁₁NO₂Se
Molecular weight: 196.11
IUPAC Standard InChI: InChI=1S/C5H11NO2Se/c1-9-3-2-4(6)5(7)8/h4H,2-3,6H2,1H3,(H,7,8)
IUPAC Standard InChIKey: RJFAYQIBOAGBLC-UHFFFAOYSA-N
CAS Registry Number: 1464-42-2
Chemical structure:
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Other names: Butanoic acid, 2-amino-4-(methylseleno)-
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Gas phase ion energetics data

Data compiled as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

IE (eV)	Method	Reference	Comment
8.26 ± 0.03	EI	Bentley, Johnstone, et al., 1971	LLK
8.29 ± 0.15	EI	Svec and Junk, 1967	RDSH

Appearance energy determinations

Ion	AE (eV)	Other Products	Method	Reference	Comment
C₂H₅Se⁺	12.03 ± 0.06	?	EI	Bentley, Johnstone, et al., 1971	LLK
C₂H₅Se⁺	12.05 ± 0.14	?	EI	Svec and Junk, 1967	RDSH
C₃H₆NSe⁺	10.33 ± 0.07	?	EI	Bentley, Johnstone, et al., 1971	LLK
C₃H₇Se⁺	9.34 ± 0.15	C₂H₄NO₂	EI	Bentley, Johnstone, et al., 1971	LLK
C₄H₆NOSe⁺	10.00 ± 0.05	H₂O+CH₃	EI	Bentley, Johnstone, et al., 1971	LLK
C₄H₈NO₂Se⁺	9.35 ± 0.10	CH₃	EI	Bentley, Johnstone, et al., 1971	LLK
C₄H₁₀NSe⁺	9.83 ± 0.16	CO₂H	EI	Bentley, Johnstone, et al., 1971	LLK
C₄H₁₀NSe⁺	9.59 ± 0.20	?	EI	Svec and Junk, 1967	RDSH
C₅H₉NOSe⁺	8.73 ± 0.10	H₂O	EI	Bentley, Johnstone, et al., 1971	LLK

References

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Bentley, Johnstone, et al., 1971
Bentley, T.W.; Johnstone, R.A.W.; Mellon, F.A., Aspects of mass spectra of organic compounds. Part IX. Evidence against charge localization in the fragmentation of methionine and selenomethionine, J. Chem. Soc. B, 1971, 1800. [all data]

Svec and Junk, 1967
Svec, H.J.; Junk, G.A., Electron-impact studies of substituted alkanes, J. Am. Chem. Soc., 1967, 89, 790. [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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