The ESR, magnetic susceptibilities, IR and electronic spectra, and electric conductivities of solid state were measured for a series of nickel complexes of the general formula Ni(diamine)2ClX2 which appeared to contain 'tervalent nickel' in order to elucidate to oxidation state of the nickel. Based on these data they were characterized and classified into the following three groups. A) Ni(en)2Cl3 and Ni(tn)2Cl3, low-spin d7 Ni(III) complexes; B) Ni(pn)2Cl3, Ni(cyn)2Cl3, Ni(btn)2Cl3 and Ni(en)2Cl(ClO4)2, Ni(II)Ni(IV) mixed valence complexes; and C) Ni(phn)2Cl3, probably Ni(II) complex with cation radical ligand.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry