Abstract
The preparation of the title compound via a trans-metallation route has been reinvestigated, and also its formation by direct telluration of azobenzene at 135–150°C has been demonstrated. 13C NMR data for tellurated and mercurated azobenzene are compared. Reduction with excess hydrazine affords the new ditelluride (C 12H 9N 2) 2Te 2. The crystal structure of (2-phenylazophenyl- C, N′)tellurium(IV) trichloride has been determined. The coordination about Te is octahedral with a vacant equatorial position, two Cl atoms apical, the third Cl atom and the bidentate organic ligand equatorial. The title compound is essentially monomeric, there are no significant interactions between Te and Cl in neighbouring molecules.
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