Homoleptic Complexes of Bisstannylenes with Nickel(0): Synthesis, X-Ray Diffraction Studies, and 119Sn NMR Investigations

The benzannulated bisstannylenes linked by a CH 2 C(CH 3 ) 2 CH 2 ( 3 ) or 1,3-(CH 2 ) 2 C 6 H 4 bridging unit ( 4 ) react with [Ni(cod) 2 ] to give the intensely colored homoleptic Ni 0 complexes 5 and 6 . X-ray diffraction and 119 Sn NMR studies for the complex of the bisstannylene with the CH 2 C(CH 3 ) 2 CH 2 linker 5 reveal the presence of four identical tin atoms. For the nickel complex 6 of the bisstannylene ligand, which contains a 1,3-(CH 2 ) 2 C 6 H 4 bridging unit, two types of tin atoms with different coordination environments were found both in solution and in the solid state.