Organotellurium halides: New ligands for transition metal complexes

This review summarizes recent advances in the coordination chemistry of organotellurium halides with an emphasis on the special features of the coordination patterns of the aryltellurium halides (ArTeX; X = Br, I) in transition metal carbonyl complexes (Fe, Co, Mn, Re, Ru). Unusual shortening of metal–tellurium bonds and inter- and intramolecular X → Te secondary interactions are observed.

Figure optionsDownload high-quality image (179 K)Download as PowerPoint slideHighlights
► Transition metal complexes with novel organotellurohalide ligands are reviewed.
► Te center in organotellurohalide ligands is amphoteric.
► Shortening of metal–Te distances is typical for all metal-tellurohalide complexes.
► Hypervalent bonding in Te-halide complexes may be contributed from metal back donation.
► Competition between halogen X → Te and metal → Te donation is enhancing metal-Te and weaker weakening X → Te additional bonding.