Copper(I) complexes with fluorinated hydrotris(pyrazolyl)borate: Influence of electronic effects on their structure,physicochemical properties,and reactivity |
| |
Authors: | Kiyoshi Fujisawa Masahiro YoshidaYoshitaro Miyashita Ken-ichi Okamoto |
| |
Affiliation: | Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8571, Japan |
| |
Abstract: | Copper(I) coordination complexes of the anionic fluorinated ligand, hydrotris(3-trifluoromethyl-5-methyl-1-pyrazolyl)borate (L0f−), i.e. the copper(I) carbonyl complex, [CuI(L0f)(CO)] (1), the copper(I) triphenylphosphine complex, [CuI(L0f)(PPh3)] (2), the copper(I) acetonitrile complex, [CuI(L0f)(NCMe)] (3), and the corresponding copper(I) triphenylphosphine complex with hydrotris(3,5-diisopropyl-1-pyrazolyl)-borate anion (L1−), i.e. [CuI(L1)(PPh3)] (4), were synthesized in order to investigate the influence of the electron-withdrawing groups on the pyrazolyl rings. The structures of complexes 1, 2, and 4 were determined by X-ray crystallography. While X-ray crystallography did not show definitive trends in terms of copper(I) atom geometry, the clear influence of the electronic structure of the pyrazolyl rings is observed by spectroscopic techniques, namely, IR and multinuclear NMR spectroscopy. Finally, the relative stability of the copper(I) complexes is discussed. |
| |
Keywords: | Copper complex Tris(pyrazolyl)borate Coordination chemistry Crystal structure Nitrogen ligand |
本文献已被 ScienceDirect 等数据库收录! |
|