Abstract
The variable temperature carbon-13 NMR spectra of cyclohexyltrimethylstannane and cyclohexyltrimethylplumbane have been recorded, and at −69°C, the chair-chair conformational interconversion is “frozen”. A values ( A = -ΔG° = RTln K) for the (CH 3) 3Sn (1.06 ± 0.14) and (CH 3) 3Pb (0.67 ± 0.06) groups are derived.
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