Syntheses, structures and electrochemical properties of homoleptic ruthenium(III) and osmium(III) complexes bearing two tris(carbene)borate ligands

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• 作者：Fei Chen^a ; Gao-Feng Wang^a ; Yi-Zhi Li^a ; Xue-Tai Chen^a ; ^{xtchen@netra.nju.edu.cn} ; Zi-Ling Xue^b
• 关键词：Ruthenium ; Osmium ; Tridentate ; N-heterocyclic carbene ; Electrochemistry
• 刊名：Inorganic Chemistry Communications
• 出版年：2012
• 期刊代码：39_13877003
• 类别：ch
• 出版时间：July, 2012
• 卷：21
• 期：Complete
• 页码：88-91
• 文件大小：453 K

摘要

Six-coordinate homoleptic ruthenium(III) and osmium(III) N-heterocyclic carbene complexes [PhB(ImMe)₃]₂M(OTf) (M = Ru, 1a; M = Os, 1b) with two tris(N-heterocyclic carbene)borate ligands have been prepared and characterized by ESI-MS, elemental analyses, XPS, and single-crystal X-ray diffraction. X-ray diffraction shows that both complexes display octahedral configuration, in which the metal center is coordinated by two tridentate N-heterocyclic carbene ligands. Electrochemical properties of complexes 1a and 1b have been studied by cyclic voltammetry (CV) measurements, which reveal two reversible redox waves at 0.60, 鈭?#xA0;0.63 V and 0.35, 鈭?#xA0;0.86 V for 1a and 1b, respectively, indicating the strong donating nature of the tris(N-heterocyclic carbene)borate ligand.