Coordination complexes of dimethyltin dichloride with C-nitroso compounds

Coordination complexes of five nitroanilines with dimethyltin dichloride have been prepd. and studied by 13C, 15N and 119Sn solid state NMR spectroscopy and by Moessbauer spectroscopy. The 13C resonances of the CH3-Sn groups, the 119Sn resonances and the Moessbauer quadrupole splitting values permit assignment of the two classes of coordination complexes, i.e., 1:1 pentacoordinate and 1:2 octahedral complexes. The C-NO resonances decrease on coordination. The 15N resonances demonstrate that coordination is accompanied by an enhancement of the quinonoid contribution in the ligand itself.