A fourier-transform infrared and laster-raman spectroscopic study of 4,4'-bipyridyl transition metal (II) tetracyanonickelate ciathrates.

The FT-IR and Raman spectra are reported of M(4,4-bipyridyl)Ni(CN)4·nG (where M = Mn, Fe, Co, Cu or Zn and G = benzene or aniline;n = 0–2) clathrates. The host structure consists of a three-dimensional rigid lattice formed by infinite polymeric layers of {M-Ni(CN)4} and 4,4-bipyridyl bridges between the metal (M) atoms of the adjacent polymeric layers. Bidentate 4,4-bipyridyl molecules are found to be centrosymmetric in the structure