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Synthesis and characterization of three dinuclear copper(I) complexes of 1,2‐bis(diphenylphosphino)‐1,2‐dicarba‐ closo ‐dodecaborane
Author(s) -
Zhang Daopeng,
Dou Jianmin,
Gong Shuwen,
Li Dacheng,
Wang Daqi
Publication year - 2006
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1119
Subject(s) - chemistry , crystallography , ligand (biochemistry) , copper , crystal structure , tetrahedral molecular geometry , carborane , stereochemistry , single crystal , biochemistry , receptor , organic chemistry
Three dinuclear copper(I) complexes, [Cu 2 (µ‐Cl) 2 (1,2‐(PPh 2 ) 2 ‐1,2‐C 2 B 10 H 10 ) 2 ]·2CH 2 Cl 2 ( 1 ), [Cu 2 (µ‐Br) 2 (1,2‐(PPh 2 ) 2 ‐1,2‐C 2 B 10 H 10 ) 2 ]·2THF ( 2 ) and {Cu 2 (µ‐I) 2 [1,2‐(PPh 2 ) 2 ‐1,2‐C 2 B 10 H 10 ] 2 } ( 3 ) have been synthesized by the reactions of CuX (X = Cl, Br and I) with the closo ligand 1,2‐(PPh 2 ) 2 ‐1,2‐C 2 B 10 H 10 . All these complexes were characterized by elemental analysis, FT‐IR, 1 H and 13 C NMR spectroscopy and X‐ray structure determination. Single crystal X‐ray structure determinations show that every complex contained di‐µ‐X‐bridged structure involving a crossed parallelogram plane formed by two Cu atoms and two X atoms (X = Cl, Br, I). The geometry at the Cu atom was a distorted tetrahedron, in which two positions were occupied by two P atoms of the PPh 2 groups connected to the two C atoms of carborane (Cc), and the other two resulted from two X atoms which bridged the other Cu atom at the same time. To the best of our knowledge, this is the first example of copper(I) complexes with 1,2‐diphenylphosphino‐1,2‐dicarba‐ closo ‐dodecaborane as ligand characterized by X‐ray diffraction. The catalytic property of the complex 3 for the amination of iodobenzene with aniline was also investigated. Copyright © 2005 John Wiley & Sons, Ltd.