Low Temperature 13C NMR Spectroscopy Research Articles

Conformational equilibria in cyclohexyltrimethylstannane and cyclohexyltrimethylplumbane by low temperature 13C NMR spectroscopy

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.