Crystal Structure and Properties of Bis(benzimidazol-2-ylmethanol- N′O)(nitrato-NO)copper(II) Nitrate Monohydrate

Abstract

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.

Department(s)

Chemistry

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1979 Royal Society of Chemistry, All rights reserved.

Publication Date

01 Jan 1979

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