A thermokinetic method for the determination of heats of reaction of gas phase processes

A redetermination of the heats of formation of chloro- and dichlorocarbene and the deprotonation of methyl cation, a spin forbidden process?

“…For example, in 1985 Lias, Karpas and Liebman (LKL) reported H • f,298 (CCl 2 ) = 39 ± 3 kcal mol −1 [1 cal = 4.184 J] and noted 13 previous measurements which ranged from <30 to <59 kcal mol −1 [2]. Subsequently, at least six more values have appeared and they range from 51 to 57 kcal mol −1 [3][4][5][6][7][8]. Recommended heats of formation of 47 ± 3 and 55 ± 2 kcal mol −1 also have been given, but no basis was provided for the first of these values [9] and the second is based in part upon the expec- * Corresponding author.…”