Stopping a Chromium Carousel: X-Ray Crystallographic and Variable-Temperature 13C-NMR Studies on Dicarbonyl(hexaethylbenzene)thiocarbonylchromium(0) and Related Complexes

The low temperature 13C n.m.r. spectrum of (C6Et6)Cr(CO)2CS shows the molecule to have Cs symmetry as it does in the solid state; this result provides the first clear evidence of cessation of tripodal rotation in a neutral half-sandwich compound of Cr