The crystal and molecular structures of 2-(2-pyridyl)phenyltellurium(II) chloride and of two modifications of 2-(2-pyridyl)phenyltellurium(II) iodide; chemical investigations of organotellurium iodides

Autor: Zulfiqar Majeed, Hongli Chen, William R. McWhinnie, Sean L.W. McWhinnie, Thomas A. Hamor
Rok vydání: 1996
Předmět:
Zdroj: Journal of Organometallic Chemistry. 523:53-61
ISSN: 0022-328X
DOI: 10.1016/0022-328x(96)06375-9
Popis: The structures of the title compounds were determined. The structure of 2-(2-pyridyl)phenyltellurium(II) chloride ( 1 ) is triclinic and consists of discrete molecules with average bonding distances over six independent molecules TeCl 2.606(11), TeC 2.077(7) A and a short Te…N interaction distance of 2.205(11) A. The structure of the molecule in the ‘pure’ compound is compared with that previously reported in which it forms a 2:1 inclusion compound with p -ethoxyphenylmercury(II) chloride. One form of the related iodide ( 2 ) is triclinic and isomorphous with the above chloride; selected bond distances are TeI 2.937(1), TeC 2.095(18) and TeN 2.260(10) A. A second form of the iodide ( 3 ) is monoclinic ( Z = 4) and yields more accurate parameters: TeI 2.917(11), TeC 2.112(6), TeN 2.268(5) A. The synthesis of the new organyltellurium(II) iodides are given together with those of ‘RTeI’, where R = 2-(2-pyridyl) phenyl- or 2-phenylazophenyl-: it is suggested on the basis of spectroscopic examination (NMR and Raman) that the oxidation state of tellurium in these ‘triiodide’ species is (II).
Databáze: OpenAIRE
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