Diphosphene
- Formula: H2P2
- Molecular weight: 63.96340
- CAS Registry Number: 41916-72-7
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Reaction thermochemistry data
Go To: Top, Gas phase ion energetics data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: John E. Bartmess
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual 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 |
| 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 |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, References, Notes
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, Reaction thermochemistry data, 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.
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]
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]
Notes
Go To: Top, Reaction thermochemistry data, 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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