Reactions of co-ordinated boron compounds in the gas phase. Part I. Borine carbonyl and trimethylamine

Abstract

The reaction between borine carbonyl and trimethylamine has been studied from 207·3 to 273·2°K. Below 273·2°K the reaction is second-order: d(CO)/dt=k(BH₃CO)(Me₃N). The Arrhenius parameters associated with this S_N2 reaction are E= 8·60 ± 0·30 kcal./mole, and A= 10^{9·82 ± 0·27} c.c./mole sec. At 273·2°K the unimolecular rupture of the B–C bond becomes important as a rate-controlling step.