M. Weininger, E. L. Amma
1976
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0
Influential Citations
4
Citations
Journal
Journal of Coordination Chemistry
Abstract
Abstract The crystal structure of tetrakis(N,N′-dimethylthiourea)nickel(II) bromide dihydrate has been determined by three-dimensional x-ray diffraction from 1916 counter-data reflections collected at room temperature. The structure consists of Ni[SC(NH)2(CH3)2]2+ 4 molecular ions, Br− ions and waters of hydration. The nickel is located on a center of symmetry and is coordinated to four sulfur atoms in a square planar configuration. The waters of hydration and the bromide ions are involved in hydrogen bonding to the N,N′-dimethylthiourea (dmtu) groups. The orientation of the dmtu groups is such that two bond through the sulfur sp2 orbital and the others bond through the π-orbitals of the dmtu group. The Ni-S distances are 2.204 ± 0.002 A and 2.230 ± 0.002 A, and the Ni-S-C angles are 106.2 ± 0.2A and 110.3 ± 0.3°. The dmtu groups are planar except for methyl hydrogens. The crystals are monoclinic, P21/a with a = 13.424 ± 0.002 A, b = 12.321 ± 0.005 A, c = 8.460 ± 0.008 A β = 107.07 ± 0.05°, ρ0 = 1.67 g cm...