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. Author manuscript; available in PMC: 2006 Apr 21.
Published in final edited form as: J Am Chem Soc. 2005 Feb 16;127(6):1752–1764. doi: 10.1021/ja045607k

Table 1.

Racemization Kinetics for Metallacycle 8

temp (° C) kH (s −1)a kD (s −1) kH/kD
25 1.48 × 10−4 ND NA
35 4.25 × 10−4 1.49 × 10−4 2.8
45 1.16 × 10−3 4.08 × 10−4 2.8
a

Two runs for the first entry gave kobs = 1.46 and 1.51 × 10−5 s−1, so the error was estimated to be ±5%, and errors in activation parameters and isotope effect were determined on the basis of this value.