Crystal Structure and Properties of Bis(benzimidazol-2-ylmethanol- N′O)(nitrato-NO)copper(II) Nitrate Monohydrate
The crystal and molecular structures of the title complex, [Cu(Hbim) 2(NO3)][NO3]·H2O, have been determined by single-crystal X-ray diffraction using counter methods. Crystal data: space group P1, a = 8.562(4), b = 9.990(4), c = 13.546(1) Å, α = 90.16(2), β = 100.86(2) γ = 118.29(4)°, and Z = 2. Refinement carried out by full-matrix least squares has reached a conventional R factor of 0.025. The ligand environment of the copper atom corresponds approximately to a tetragonally distorted octahedron. The two Hbim ligands are bidentate, bonding via one of the nitrogen atoms and the methanol oxygen. A co-ordinated bidentate nitrate group completes the octahedron. Hydrogen-bonding interactions between the other, unco-ordinated, nitrate group, the water of crystallisation, and the [Cu(Hbim)2(NO3)]+ cations form an extensively linked polymeric network. High-precision magnetic-susceptibility measurements show that the polymeric structure is strictly magnetically dilute down to liquid-helium temperatures. This contrasts with literature data that imply slight antiferromagnetic interactions in this complex and three of its structural analogues.
G. J. Hamilton et al., "Crystal Structure and Properties of Bis(benzimidazol-2-ylmethanol- N′O)(nitrato-NO)copper(II) Nitrate Monohydrate," Journal of the Chemical Society, Dalton Transactions, Royal Society of Chemistry, Jan 1979.
The definitive version is available at http://dx.doi.org/10.1039/DT9790000515
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© 1979 Royal Society of Chemistry, All rights reserved.