Pseudoelementverbindungen. I. Zum Koordinationsverhalten von Diphenyl-cyanamido-thiophosphinat

Pseudoelement Compounds. I. Coordination Behaviour of Diphenyl-cyanamido-thiophosphinate The synthesis of the cyanamido-thiophosphinate-nickel(II) complexes Nipy_nX₂ (X = Ph₂P(S)NCN, n = 0, 2, 4) is reported and the i.r. and u.v. spectra of these compounds are discussed. The single crystal X-ray analysis of the tetrapyridine complex shows that the anionic ligand is coordinated via the cyano-nitrogen atom. With a bond angle N(1)? C(1)? N(2) of 175.4(3)° the NCN group is nearly linear. The bond distances N(1)? C(1) and C(1)? N(2) are asymmetric and typical of NC double and triple bonds.