The FT-IR spectra of transition metal 3-aminopyridine tetracyanonickelate complexes

FT-IR spectra of M(3apy)(2)Ni(CN)(4) {where M = Mn, Fe, Co, Ni, Cu, Zn or Cd; 3apy = 3-aminopyridine} complexes are reported for the first time in the 400-4000 cm(-1) range. The spectral features suggest that the compounds are similar in structure to the Hofmann-type complexes with infinite polymeric layers formed with Ni(CN)(4)(2-) ions bridged by M(3apy)(2)(2+) cations. It is concluded that the ring nitrogen and not the amino nitrogen is involved in complex formation. (C) 1998 Elsevier Science B.V. All rights reserved.