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The crystal structures of 2-(2′-pyridyl)phenyltellurium(II) bromide and of the inclusion compound bis[2-(2′-pyridyl)phenyltellurium(II) chloride]·p-ethoxyphenyl-mercury(II) chloride |
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| Authors: | Martin R Greaves Thomas A Hamor Brendan J Howlin Tarlok S Lobana Shabaan A Mbogo William R McWhinnie and David C Povey |
| Institution: | a Department of Chemical Engineering & Applied Chemistry, Aston University, Aston Triangle, Birmingham B4 7ET UK b Department of Chemistry, University of Birmingham, Birmingham B15 2TT UK c Department of Chemistry, University of Surrey, Guildford, Surrey GV2 5XH UK |
| Abstract: | In 2-(2′-pyridyl)phenyltellurium(II) bromide (1) the coordination about tellurium may be described as pseudo-trigonal bipyramidal wth bromine (Te---Br = 2.707(11) Å) and nitrogen (Te---N) = 2.236(11) Å) atoms occupying axial positions. The equatorial plane comprises a carbon atome (Te---C = 2.111(6) Å) and two lone pairs of electrons. There are no significant intermolecular interactions between the six independent molecules in the unit cell. Bis2-2′-pyridyl)phenyltellurium(II) chloride]·p-ethoxy-phenylmercury(II) chloride (2) may be regarded as an “inclusion compound” obtained by replacement of two RTeX (X = Cl or Br) molecules by two p-ethoxyphenylmercury(II) chloride entities. There is approximately linear coordination about mercury (C---Hg---Cl = 179.2°(4), Hg-C = 2.044(14) and Hg---Cl = 2.328(4) Å) and 2-(2′-pyridyl)phenyltellurium(II) chloride, with a structure similar to that of (1) above (Te---N = 2.2366(6), Te---Cl = 2.558(1), Te---C = 2.080(25) Å). There are no significant intermolecular contacts. |
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