A pentaammineruthenium(III) dimer with the novel bridging ligand 4,4-dicyanamidobiphenyl dianion

The novel ligand 4,4′-dicyanamidobiphenyl dianion (bp 2− ) has been synthesized and characterized by 13 C NMR spectroscopy, cyclic voltammetry, and crystallography. The crystal structure of [Ph 4 As] 2 [bp]•H 2 O showed that bp 2− is approximately planar with a dihedral angle of 8.2° between phenyl ring planes and the cyanamide groups in an anti conformation. The water of crystallization is asymmetrically hydrogen bonded between cyanamide …