Chromium, pentacarbonyl(1-methoxyethylidene)-
- Formula: C8H6CrO6
- Molecular weight: 250.1257
- CAS Registry Number: 20540-69-6
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Reaction thermochemistry 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 by: José A. Martinho Simões
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Individual Reactions
C12H16CrO5 (solution) + (solution) =
(solution) + C8H6CrO6 (solution)
By formula: C12H16CrO5 (solution) + C3H6O (solution) = C7H16 (solution) + C8H6CrO6 (solution)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -56.5 ± 5.0 | kJ/mol | PAC | Yang, Peters, et al., 1986 | solvent: Heptane |
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:
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 |
|---|---|---|---|
| 7.5 ± 0.1 | EI | Fischer, Kreiter, et al., 1971 | LLK |
| 7.46 ± 0.05 | EI | Muller and Connor, 1969 | RDSH |
| 7.47 | PE | Block and Fenske, 1977 | Vertical value; LLK |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| CCrO+ | 13.9 ± 0.2 | ? | EI | Muller and Connor, 1969 | RDSH |
| CH3Cr+ | 15.6 ± 0.3 | ? | EI | Muller and Connor, 1969 | RDSH |
| C2H3CrO+ | 13.9 ± 0.2 | ? | EI | Muller and Connor, 1969 | RDSH |
| C3H6CrO+ | 12.2 ± 0.2 | 5CO | EI | Muller and Connor, 1969 | RDSH |
| C4H6CrO2+ | 10.7 ± 0.1 | 4CO | EI | Muller and Connor, 1969 | RDSH |
| C5H6CrO3+ | 10. ± 0.1 | 3CO | EI | Muller and Connor, 1969 | RDSH |
| C6H6CrO4+ | 8.9 ± 0.1 | 2CO | EI | Muller and Connor, 1969 | RDSH |
| C7H6CrO5+ | 7.92 ± 0.05 | CO | EI | Muller and Connor, 1969 | RDSH |
| Cr+ | 13.6 ± 0.4 | ? | EI | Muller and Connor, 1969 | RDSH |
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.
Yang, Peters, et al., 1986
Yang, G.K.; Peters, K.S.; Vaida, V.,
Chem. Phys. Lett., 1986, 125, 566. [all data]
Fischer, Kreiter, et al., 1971
Fischer, E.O.; Kreiter, C.G.; Kollmeier, H.J.; Muller, J.; Fischer, R.D.,
Ubergangsmetall- carben-komplexe. XXVII. Ringsubstituierte (methoxyphenylcarben)-pentacarbonylchrom(0)- komplexe,
J. Organomet. Chem., 1971, 28, 237. [all data]
Muller and Connor, 1969
Muller, J.; Connor, J.A.,
Massenspektroskopische Untersuchungen an Pentacarbonylchrom-carben-Komplexen,
Chem. Ber., 1969, 102, 1148. [all data]
Block and Fenske, 1977
Block, T.F.; Fenske, R.F.,
A photoelectron spectroscopic study of some pentacarbonylchromium carbene complexes,
J. Am. Chem. Soc., 1977, 99, 4321. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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