Oxidative-addition reactions of molecular diiodine and dibromine to divalent organotin compounds. Crystal structures of bistin(IV) dibromide and phenyl>-(4-tolyl)tin(IV) diodide.

Article abstract of DOI:10.1016/0022-328X(91)86308-D

The reactions of bis<8-(dimethylamino)-1-naphthyl>tin(II) with dibromine or diiodine aford bis<8-(dimethylamino)-1-naphthyl>tin(IV) dibromide (1) and bis<8-(dimethylamino)-1-naphthyl>tin(IV) dioodide (2), respectively.Reaction of <2,6-phenyl>(4-tolyl)tin(II) with diiodine gives <2,6(4-tolyl)tin(IV) diiodide (3) in quantitative yield.The crystal structures of 1 and 3 have been determined by X-ray diffraction methods.As a result of intramolecular coordination of the nitrogen atoms with the tin centers, the geometry about tin in both 1 and 3 is octahedral, while the carbon atoms bound to tin are in trans position.In 1 the two bromine atoms are cis to one another, as are the two nitrogen atoms, whereas in 3 the two iodine atoms, like the two nitrogen atoms, are trans to one another. 1H, 13C and 119Sn solution NMR spectroscopic studies of 1-3 show that they retain the structures found in the solid state.