A VIBRATIONAL SPECTROSCOPIC STUDY OF HOFMANN-TYPE COMPLEXES OF 3-METHYLPYRIDINES AND 4-METHYLPYRIDINES

AKYUZ S., PASAOGLU H., DAVIES J.

JOURNAL OF MOLECULAR STRUCTURE, vol.317, no.3, pp.215-221, 1994 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 317 Issue: 3
  • Publication Date: 1994
  • Doi Number: 10.1016/0022-2860(93)07851-m
  • Journal Name: JOURNAL OF MOLECULAR STRUCTURE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.215-221
  • Istanbul University Affiliated: No

Abstract

The FT-IR and Raman spectra of eight new Hofmann-type complexes of 3- and 4-methylpyridine, ML(2)Ni(CN)(4) (M = Mn, Fe, Co or Zn; L = 3- or 4-methylpyridine) are reported. The structure consists of corrugated polymeric layers of [M-Ni(CN)(4)](infinity) with methylpyridine molecules bound directly to the metal (M). For a given ligand (3-Mepy or 4-Mepy) the effects of metal-ligand bond formation on the ligand modes are examined and the metal sensitivity sequence of the ligand frequencies is found to be Mn < Fe < Co < Zn. The metal-ligand bond strengths of the methyl derivatives of pyridine in which the substituents are in different positions have also been compared and are found to increase in the order 3-Mepy < 4-Mepy for a given transition metal. The effective magnetic moments of the complexes are given.