Copper(II) nitrato and chloro complexes with sterically hindered tridentate ligands: Influence of ligand framework and charge on their structure and physicochemical properties

被引:19
作者
Fujisawa, Kiyoshi [1 ]
Iwamoto, Hiroaki [1 ]
Tobita, Kengo [1 ]
Miyashita, Yoshitaro [1 ]
Okamoto, Ken-ichi [1 ]
机构
[1] Univ Tsukuba, Dept Chem, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan
关键词
Pyrazolylborate ligand; Pyrazolylmethane ligand; Copper; Coordination chemistry; Crystal structure; RAY-ABSORPTION SPECTROSCOPY; MODEL COMPLEXES; K-EDGE; MOLECULAR-STRUCTURE; TRIS(3,5-DIISOPROPYL-1-PYRAZOLYL)METHANE LIGAND; POLYPYRAZOLYLBORATE LIGANDS; COORDINATION CHEMISTRY; ELECTRONIC-STRUCTURE; METAL DERIVATIVES; CU-II;
D O I
10.1016/j.ica.2009.05.016
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Copper(II) coordination complexes of the neutral ligand, tris(3-tert-butyl-5-methyl-1-pyrazolyl) methane (L2'), i.e. the copper(II) nitrato complexes [Cu(L2')(NO3)][Cu(NO3)4](1/2) (1) and [Cu(L2')(NO3)](ClO4) (2) and the copper(II) chloro complex [Cu(L2')(Cl)](ClO4) (3), and its anionic borate analogue, hydrotris(3-tert- butyl-5-methyl-1-pyrazolyl) borate (L2), i. e. the copper(II) nitrato complex [Cu(L2)(NO3)] (4) and the copper(II) chloro complex [Cu(L2)(Cl)] (5), were synthesized in order to investigate the influence of ligand framework and charge on their structure and physicochemical properties. While X-ray crystallography did not show any definitive trends in terms of copper(II) atom geometry in four-coordinate copper(II) chloro complexes 3 and 5, different structural trends were observed in five-coordinate copper(II) nitrato complexes 1, 2, and 4. These complexes were also characterized by spectroscopic techniques, namely, UV-Vis, ESR, IR/far-IR, and X-ray absorption spectroscopy. (C) 2009 Elsevier B. V. All rights reserved.
引用
收藏
页码:4500 / 4509
页数:10
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