Synthesis and vibrational spectroscopic analysis of some Hofmann type clathrates.

New Hofmann type clathrates in the form of M(pp)(2)Ni(CN)(4)·2G (where pp = 1-phenylpiperazine, G = 1,4-dioxane and M = Ni, Co or Cd) have been prepared in powder form and their FT-IR and FT-Raman spectra are reported. The results suggest that the present compounds are similar in structure to the Hofmann type clathrates and their structures consist of conjugated polymeric layers of |M-Ni(CN)(4)|(∞) with the pp bound to the metal (M) atom.