Crystal and molecular structure of complex compound (C5H5)2Re(H)Cu(μ-I)2CuRe(H)(C5H5)2: A first direct proof of the formation of the Cu(I)Cu(I) bond期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Crystal and molecular structure of complex compound (C5H5)2Re(H)Cu(μ-I)2CuRe(H)(C5H5)2: A first direct proof of the formation of the Cu(I)Cu(I) bond

Authors:	Vitaly K Bel&#x;sky Victor M Ishchenko Boris M Bulychev Grigory L Soloveichik

Institution:	The L. Ya. Karpov Physico-Chemical Research Institute, 107120, Moscow, U.S.S.R.;The Lomonosov Moscow State University, Chemistry Department, 117234, Moscow, U.S.S.R.;The Institute of New Problems in Chemistry, U.S.S.R. Academy of Sciences, 142432, Chernogolovka, Moscow District, U.S.S.R.

Abstract:	The structure of the bimetallic dimer complex (η⁵-C₅H₅)₂Re(H)CuI]₂ has been investigated. The crystals are monoclinic: a = 16.070(4) Å, b = 7.788(2)Å, c = 17.439(5) Å; b = 96.62(2)°; the space group I2/a; z = 4. The bond between rhenium and copper atoms (2.60 Å) is of the donor-acceptor type; dimerization occurs by the way of formation of the double bridge CuI₂Cu and the direct inter-metal bond CuCu(2.55 Å). The hydride hydrogen atom is the terminal one. The cyclopentadienyl rings form a bent sandwich with the angle between the ring centres and rhenium atom being equal to 158°. It is suggested that the CuCu inter-metal bonding takes place on account of the transition of the non-bonding d-electrons of copper atoms to a high-spin state.

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