Crystal and molecular structure of [CH3C(S)CHC(S)CH3][CH3S(O)(CH2)2]Ni

Abstract The formation of chelating sulfur ylides has been suggested previously. This study reports the first structural evidence for their existence. The title compound contains a chelating bis(methylene)methylsulfoxonium ligand and a cis -NiC 2 S 2 coordination geometry. The material crystallizes in the space group P 2 1 / c with a 13.371(4), b 5.8381(15) and c 15.116(4) A, β 100.18°, Z = 4. With 1206 reflections, R = 0.067. The material appears to be stable to the atmosphere.