Diphosphene
- Formula: H2P2
- Molecular weight: 63.96340
- CAS Registry Number: 41916-72-7
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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 compiled as indicated in comments:
B - John E. Bartmess
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to H2P2+ (ion structure unspecified)
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 1.000 ± 0.010 | LPES | Ervin and Lineberger, 2005 | Trans isomer; B |
| 1.030 ± 0.010 | LPES | Ervin and Lineberger, 2005 | cis isomer; B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 10.2 ± 0.2 | EI | Fehlner and Callen, 1968 | RDSH |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| P2H+ | 13.3 ± 0.4 | H | EI | Fehlner and Callen, 1968 | RDSH |
| P2+ | 11.9 ± 0.4 | ? | EI | Fehlner and Callen, 1968 | RDSH |
De-protonation reactions
HP2- + = H2P2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 356.2 ± 3.1 | kcal/mol | G+TS | O'Hair, Krempp, et al., 1992 | gas phase; Acidity between MeNO2, tBuSH; B |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 348.0 ± 3.0 | kcal/mol | IMRB | O'Hair, Krempp, et al., 1992 | gas phase; Acidity between MeNO2, tBuSH; B |
References
Go To: Top, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Ervin and Lineberger, 2005
Ervin, K.M.; Lineberger, W.C.,
Photoelectron spectroscopy of phosphorus hydride anions,
J. Chem. Phys., 2005, 122, 19, 194303, https://doi.org/10.1063/1.1881153
. [all data]
Fehlner and Callen, 1968
Fehlner, T.P.; Callen, R.B.,
Mass spectrometry of phosphorus hydrides,
Advan. Chem. Ser., 1968, 72, 181. [all data]
O'Hair, Krempp, et al., 1992
O'Hair, R.A.J.; Krempp, M.; Damrauer, R.; Depuy, C.H.,
Gas-Phase Ion Chemistry of HP2(-), FP2(-), and HP2(+),
Inorg. Chem., 1992, 31, 11, 2092, https://doi.org/10.1021/ic00037a021
. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy EA Electron affinity ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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