tetramethyldiphosphine

Formula: C₄H₁₂P₂
Molecular weight: 122.0856
CAS Registry Number: 3676-91-3
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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

View reactions leading to C₄H₁₂P₂⁺ (ion structure unspecified)

Ionization energy determinations

IE (eV)	Method	Reference	Comment
7.5	PE	Schweig, Thon, et al., 1979	LLK
8.6	EI	Bogolyubov, Grishin, et al., 1969	RDSH
7.80	PE	Schweig, Thon, et al., 1979	Vertical value; LLK
8.79	PE	Cowley, Dewar, et al., 1974	Vertical value; LLK
7.88	PE	Cowley, Dewar, et al., 1974	Vertical value; LLK

Appearance energy determinations

Ion	AE (eV)	Other Products	Method	Reference	Comment
CH₂P⁺	19.3 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
CH₃P⁺	13.5 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
CH₃P₂⁺	13.5 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
CH₄P⁺	15.2 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
CH₅P⁺	16.8 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
C₂H₃⁺	20.7 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
C₂H₄P⁺	15.2 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
C₂H₅⁺	14.3 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
C₂H₅P⁺	13.6 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
C₂H₅P₂⁺	13.5 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
C₂H₆P⁺	13.3 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
C₂H₆P₂⁺	14.3 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
C₂H₇P₂⁺	13.2 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
C₂H₈P₂⁺	10.0 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
C₃H₆P⁺	11.3 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
C₃H₉P₂⁺	10.8 ± 0.3	CH₃	EI	Bogolyubov, Grishin, et al., 1969	RDSH
C₃H₁₀P₂⁺	10.6 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
C₄H₁₂P₂⁺	8.6 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
P₂H⁺	15.8 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH
PH₃⁺	17.0 ± 0.3	?	EI	Bogolyubov, Grishin, et al., 1969	RDSH

References

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Schweig, Thon, et al., 1979
Schweig, A.; Thon, N.; Vermeer, H., On the use of photoelectron spectroscopy in studying rotational isomerism in tetramethyldiphosphine, J. Am. Chem. Soc., 1979, 101, 80. [all data]

Bogolyubov, Grishin, et al., 1969
Bogolyubov, G.M.; Grishin, N.N.; Petrov, A.A., Organic derivatives of group V and group VI elements. VIII.Mass spectra of phosphines and diphosphines, Zh. Obshch. Khim., 1969, 39, 1808, In original 1772. [all data]

Cowley, Dewar, et al., 1974
Cowley, A.H.; Dewar, M.J.S.; Goodman, D.W.; Padolina, M.C., Detection of rotational isomerism in diphosphines and diarsines by photoelectron spectroscopy, J. Am. Chem. Soc., 1974, 96, 2648. [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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