Solid state 13 C and high resolution 1 H and 13 C n.m.r. spectra of dicarbony(hexaethylbenzene)thiocarbonylchromium(0): a reaffirmation of slowed tripodal rotation

The high resolution and solid state n.m.r. spectra of the title compound indicate that the arene has alternating proximal and distal ethyl groups both in the solid and in solution: this not only requires slowed tripodal rotation on the n.m.r. time scale but also militates against the recent proposal that the major stereoisomer found in solution is different from that established crystallographically.