Synthesis, spectral and electrochemical study of coordination molecules Cu4OX6L4: 4-cyanopyridine Cu4OBr n Cl(6-n)(4-CNpy)4 complexes

被引:4
|
作者
Ondrejovic, Gregor [1 ]
Kotocova, Adela [1 ]
Koman, Marian [1 ]
Segl'a, Peter [1 ]
机构
[1] Slovak Tech Univ Bratislava, Inst Inorgan Chem Technol & Mat, Fac Chem & Food Technol, SK-81237 Bratislava, Slovakia
关键词
copper(II) 4-cyanopyridine complexes; donor-acceptor vibrational coupling; electronic spectra; electrochemistry; pi-back bonding; SUBSTITUTED PYRIDINE DERIVATIVES; INFRARED-SPECTRA; ELECTRONIC-STRUCTURES; VIBRATIONAL-SPECTRA; METAL COMPLEXES; LIGAND; DONOR; RINGS; BOND;
D O I
10.2478/s11696-010-0015-9
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
New 4-cyanopyridine halide and mixed-halide Cu4OBr (n) Cl(6-n)(4-CNpy)(4) complexes (4-CNpy = 4-cyanopyridine, n = 0-6) were synthesised, characterised, and studied by infrared spectra, electronic spectra, and cyclic voltammetry. Infrared spectra revealed donor-acceptor vibrational couplings of the Cu4O, Cu-Cl, and Cu-N stretching vibrations with the in-plane and out-of-plane pyridine ring vibrations. The infrared spectra, electronic spectra, and half-wave potentials correspond to a weak donor and a strong acceptor behaviour of the 4-cyanopyridine ligands and to pi-back bonding, Cu(II)-> pyridine rings. The results were compared with the related pyridine and 4-substituted pyridine complexes.
引用
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页码:329 / 338
页数:10
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