Theoretical and experimental studies of IR spectra of 4-aminopyridine metal(II) complexes

被引：40

作者：

Buyukmurat, Y ^{[1
]}

Akyuz, S ^{[1
]}

机构：

[1] Univ Istanbul, Dept Phys, TR-34459 Istanbul, Turkey

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2003年 / 651卷

关键词：

aminopyridine; tetracyanonickelate complexes; normal coordinate analysis; force field refinement; IR spectrum;

D O I：

10.1016/S0022-2860(02)00674-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study FT-IR spectra of M(L)(2)Ni(CN)(4) [where M = Fe or Zn, L = 4-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(L)(2)(+2) cations. IR frequency shifts, upon formation of coordination compound are reliable indicators of the coordination mode of 4-aminopyridine. It is concluded that the ring nitrogen and not the amino nitrogen is involved in complex formation. In order to investigate metal-ligand coupling peculiarities, the vibrational wavenumbers of free and coordinated 4-aminopyridine have been calculated by a force field refinement method. The results indicated that the force field of free 4-aminopyridine should be altered in complex formation in order to represent the experimental data. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：533 / 539

页数：7