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Molecular structures of (tBu)Ga(S2CNnPr2)2 and (iPrO)Ga(S2CNEt2)2: An example of an unusual ligand pseudorotation

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Abstract

The molecular structures of (tBu)Ga(S2CNnPr2)2 (1) and (iPrO)Ga(S2CNEt2)2 (2) have been determined. The variation in the geometries observed for bis-dithiocarbamate compounds of gallium, (X)Ga(S2CNMe2)2 (X=Cl, iPrO, tBu) do not lie along the Berry pseudorotation pathway for the square-based pyramid to trigonal bipyramid geometrical transition. Instead, the structures appear to lie on an unusual ligand two-step, “Texas,” pseudorotation mechanism which results in a highly distorted trigonal bipyramidal geometry. Crystal data: (1) monoclinic, P21,/c, a = 9.786(1), b = 29.218(3), c = 9.452(1) Å, β = 108.379(9)°, V = 2564.7(5) Å3, and Z = 4. (2) Monoclinic, P21 /c, a = 10.980(3), b = 15.673(4), c = 12.461(3) Å, β = 97.47(2)°, V = 2126.2(9) Å3 and Z = 4.

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Authors and Affiliations

  1. Department of Chemistry, Rice University, Houston, Texas, 77005

    Andrea Keys & Andrew R. Barron

  2. Department of Chemistry, University of Houston, Houston, Texas, 77204

    Simon G. Bott

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  1. Andrea Keys
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  2. Simon G. Bott
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  3. Andrew R. Barron
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Keys, A., Bott, S.G. & Barron, A.R. Molecular structures of (tBu)Ga(S2CNnPr2)2 and (iPrO)Ga(S2CNEt2)2: An example of an unusual ligand pseudorotation. Journal of Chemical Crystallography 28, 629–634 (1998). https://doi.org/10.1023/A:1022465010498

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