Solid state studies of some nitrosoaromatic iron carbonyls

Mössbauer spectroscopic studies of a tricarbonyl-(nitrosobenzene)iron compound and two dicarbonyl- (nitrosobenzene)triphenyl-phosphineiron compounds have shown that these compounds possess similar structures and are dimeric in character. Solid state ¹³C NMR spectroscopy shows that although in such compounds the NO bond length approaches that characteristic of a single bond, the large ipso chemical shift of the NO group is only slightly diminished. Other consequences of coordination for the structure of the C-nitroso ligand are also discussed. © 1994.