Gas-phase thermochemistry of VH and CrH

Chen, Yu-Min; Clemmer, D. E.; Armentrout, P. B.
March 1993
Journal of Chemical Physics;3/15/1993, Vol. 98 Issue 6, p4929
Academic Journal
The homolytic bond dissociation energies of the transition-metal neutral hydrides, Do(M–H) (M=V, Cr), are experimentally determined by using guided ion beam tandem mass spectrometry to measure the kinetic energy dependence of the endothermic hydride abstraction reactions of M+ with mono-, di-, and trimethylamine. From the thresholds of these reactions, we derive the 0 K values of Do(V–H)=2.13±0.07 eV and Do(Cr–H)=1.93±0.07 eV. This thermochemistry is compared with theoretical values and previous experimental results.


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