BrCH2 anion
- Formula: CH2Br-
- Molecular weight: 93.931
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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: John E. Bartmess
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Individual Reactions
CH2Br- + =
By formula: CH2Br- + H+ = CH3Br
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 1660. ± 10. | kJ/mol | Endo | Hierl, Henchman, et al., 1992 | gas phase; HO- + MeBr:6.0±2.3 kcal/mol endo. "Better than Ingemann and Nibbering, 19852" 2.0 kcal would not show barrier |
| ΔrH° | 1650. ± 19. | kJ/mol | EIAE | Rogers, Simpson, et al., 2010 | gas phase |
| ΔrH° | 1643. ± 13. | kJ/mol | G+TS | Ingemann and Nibbering, 1985, 2 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 1631. ± 14. | kJ/mol | H-TS | Hierl, Henchman, et al., 1992 | gas phase; HO- + MeBr:6.0±2.3 kcal/mol endo. "Better than Ingemann and Nibbering, 19852" 2.0 kcal would not show barrier |
| ΔrG° | 1614. ± 13. | kJ/mol | IMRB | Ingemann and Nibbering, 1985, 2 | gas phase |
References
Go To: Top, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Hierl, Henchman, et al., 1992
Hierl, P.M.; Henchman, M.J.; Paulson, J.F.,
Threshold Energies for the Reactions HO- + MeX - MeOH + X- measured by Tandem Mass Spectrometry: Acidities of MeCl and MeBr,
Int. J. Mass Spectrom. Ion Proc., 1992, 117, 475, https://doi.org/10.1016/0168-1176(92)80109-E
. [all data]
Ingemann and Nibbering, 1985
Ingemann, S.; Nibbering, N.M.M.,
Gas phase chemistry of alpha-thio carbanions,
Can. J. Chem., 1985, 62, 2273. [all data]
Rogers, Simpson, et al., 2010
Rogers, N.J.; Simpson, M.J.; Tuckett, R.P.; Dunn, K.F.; Latimer, C.J.,
Vacuum-UV negative photoion spectroscopy of CH3F, CH3Cl and CH3Br,
Phys. Chem. Chem. Phys., 2010, 12, 36, 10971-10980, https://doi.org/10.1039/c0cp00234h
. [all data]
Ingemann and Nibbering, 1985, 2
Ingemann, S.; Nibbering, N.M.M.,
Gas-phase acidity of CH3X [X = P(CH3)2, SCH3, F, Cl, Br, I] compounds,
J. Chem. Soc. Perkin Trans. 2, 1985, 837. [all data]
Notes
Go To: Top, Reaction thermochemistry data, References
- Symbols used in this document:
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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