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 |
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Authors: | Vitaly K. Bel sky,Victor M. Ishchenko,Boris M. Bulychev,Grigory L. Soloveichik |
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Affiliation: | 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. |
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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 CuI2Cu and the direct inter-metal bond CuCu(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 CuCu 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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Keywords: | Author to whom correspondence should be addressed. |
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