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Synthesis and characterization of bis(hydrazinium) tetra-(thiocyanato-N)-cobalt(II) and -nickel(II) dihydrates; crystal structure of the cobalt complex

1991; Royal Society of Chemistry; Issue: 5 Linguagem: Inglês

10.1039/dt9910001251

2050-5671

Nitish Kumar, M. Nethaji, Kashinath C. Patil,

Magnetism in coordination complexes

Bis(hydrazinium)tetra(thiocyanato-N)cobalt-(II) and-nickel(II) dihydrates, (N2H5)2M(NCS)4·2H2O (M = Co or Ni) have been prepared by the reaction of the corresponding N2H5M(N2H3CO2)3·H2O with thiocyanic acid. The structure of the cobalt complex has been determined by single-crystal X-ray diffraction studies. The cobalt ion is six-co-ordinated with an octahedral geometry generated by two hydrazinium cations and four N-bonded thiocyanate ligands. Of significance is the presence of both linear and angular Co–NCS linkages (in the same molecule) and the N2H5+ ions in cis positions. The nickel complex is isostructural with the cobalt complex.