Preparation, Characterisation and Use of [( N-Bu2Sn)S2N2]2 as a Metathetical Reagent

The dimeric compound [( n-Bu2Sn)S2N2]2 is readily prepared by addition of n-Bu2SnCl2 to a liquid ammonia/[S4N3][Cl] reaction mixture. Reaction of [ n-Bu2SnS2N2]2 with mono and dimeric organometallic M(III) (M = Rh, Ir) complexes bearing Cp* ligands (Cp* = 1,2,3,4,5-pentamethylcyclopentadienyl) and M(II) (M = Ru, Os) phosphine complexes containing a cis arrangement of chlorides gives compounds with MS2N2 metallacycles.