A vibrational spectroscopic study of Hofmann-type complexes of 3- and 4-methylpyridines

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Akyüz S., Pasaoglu H., Davies J. D.

Journal of Molecular Structure, vol.317, no.3, pp.215-221, 1994 (Scopus)

• 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: Scopus
• Page Numbers: pp.215-221
• Ondokuz Mayıs University Affiliated: Yes

Abstract

The FT-IR and Raman spectra of eight new Hofmann-type complexes of 3- and 4-methylpyridine, ML2Ni(CN)4 (M = Mn, Fe, Co or Zn; L = 3- or 4-methylpyridine) are reported. The structure consists of corrugated polymeric layers of [MNi(CN)4]∞ with methylpyridine molecules bound directly to the metal (M). For a given ligand (3-Mepy or 4-Mepy) the effects of metalligand 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 metalligand 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. © 1994.