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The conformation of pentaazamacrocyclics. I. Crystal structures of nickel (II) and copper (II) complexes of 1,4,7,11,14-pentaazacycloheptadecane

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Abstract

The crystal structures of [Ni(17-aneN5)H2O]Br2·3H2O (17-aneN5=1,4,7,11,14-pentaazacycloheptadecane) and of [Cu(17-aneN5)]CuBr4 are reported. Diffraction data using MoKα radiation were measured with a CAD-4 diffractometer and the structures refined by full-matrix least squares. The nickel compound has regular octahedral coordination with coordinated water completing the octahedron. The copper is approximately square-pyramidal with an apical Cu-N bond of 2.29(4) Å, compared to a mean bond length of 2.06(2) Å in the basal plane. As a result, the folding of the 17-membered macrocyclic rings is completely different in the two compounds.

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Authors and Affiliations

  1. Department of Chemistry, University of the Witwatersrand, P.O. Wits, 2050, Johannesburg, South Africa

    Jan C. A. Boeyens, Susan M. Dobson & Ebeth-Louise Oosthuizen

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  1. Jan C. A. Boeyens
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  2. Susan M. Dobson
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  3. Ebeth-Louise Oosthuizen
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Boeyens, J.C.A., Dobson, S.M. & Oosthuizen, EL. The conformation of pentaazamacrocyclics. I. Crystal structures of nickel (II) and copper (II) complexes of 1,4,7,11,14-pentaazacycloheptadecane. Journal of Crystallographic and Spectroscopic Research 20, 407–413 (1990). https://doi.org/10.1007/BF01180105

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  • DOI: https://doi.org/10.1007/BF01180105

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