Abstract
The structures of 1,8-cis- and 1,8-trans-5, 12-dimethyl-1,4,8,11-tetra-azacyclotetradeca-4,11-dienenickel(II) diperchlorates (I andII, respectively) have been investigated by X-ray diffracto-metric methods. CompoundI crystallizes in a monoclinic system, space group P21/n, with cell dimensionsa=13.732(2),b=13.526(2),c=10.658(2) Å,β=99.20(2)°; compoundII crystallizes in a monoclinic system, space group C2/c, with cell dimensionsa=15.776(2),b=9.919(1),c=12.451(1) Å,β=102.27(1)°. The structures were solved by “heavy atom”methods and refined by a full-matrix least-squares method to giveR=0.0601 and 0.0575 forIandII, respectively. Both N-epimers show the square planar Ni(II) coordination arrangements. The ligand ofI has approximate twofold symmetry (C2 perpendicular to the coordination plane), the moleculeII is crystallographically centrosymmetric (Ci).
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Gluziński, P., Koliński, R.A., Krajewski, J.W. et al. X-ray structural investigation of N-epimeric 1,8-cis- and 1,8-trans-5,12-dimethyl-1,4,8,11-tetraazacyclotetradeca-4,11-dienenickel(II) diperchlorates, C12H24N4Ni(ClO4)2 . Journal of Crystallographic and Spectroscopic Research 21, 145–151 (1991). https://doi.org/10.1007/BF01161056
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DOI: https://doi.org/10.1007/BF01161056