Synthesis and crystal structure of NiII complexes containing the NiS2P2 chromophore
摘要:
The nickel(II) complexes [Ni(nmedtc)(PPh(3))(2)]ClO4 (1) and [Ni(nmedtc)dppe]BPh(4) . CH2Cl2 (2) [nmedtc = N-methyl,N-ethanoldithiocarbamate, dppe = 1,2-bis(diphenylphosphino)ethane] were prepared and characterized by electronic and IR spectra, and their structures determined by X-ray crystallography. In both complexes the NiS2P2 chromophore is planar and the thioureide C-N has double bond character. Hydrogen bond interaction is observed in 1 between the ethanolic group and the perchlorate anion. Electronic and IR spectra confirm the planarity of the chromophores in both complexes and the contribution of the thioureide form in the molecular structure. (C) 1997 Elsevier Science Ltd.