Co existence of isomeric binuclear tetrahedral Cu(I) complexes and their reaction with [NiCl2(PPh3)2]

Reaction between 2-hydroxy-1-naphthaldehyde thiosemicarbazone and square planar dichlorobis triphenylphosphine Cu(II) resulted in two structurally different binuclear Cu(I) tetrahedral complexes which are co-crystallized together by exhibiting bonding isomerism. The reaction of co-crystallized complexes with [NiCl2(PPh3)2] led to C-S and Cu-S activation of coordinated ligand formed [Cu2(μ2-Cl2)(PPh3)3] and [Cu2(μ2-S2)(PPh3)3] respectively along with [Ni(nap-tsc)(PPh3)] and triphenylphosphine sulfide.