Synthesis and structure of [ReOSe(2-Se-py)3]: A rhenium(V) complex with selenium(0) as a ligand

Bis(2-pyridyl) diselenide (2-py(2)Se(2), 1) reacts with [ReOCl3(PPh3)(2)] under the formation of the unusual oxidorhenium(V) complex [ReOSe(2-pySe)(3)], which was isolated in crystalline form and studied by spectroscopic methods and X-ray diffraction. The oxidorhenium(V) core is bonded to three 2-pyridineselenolato ligands together with a selenium(0) atom. While the rhenium atom is coordinated in a common distorted octahedral coordination sphere, the selenium(0) atom shows a bent T-shaped coordination with Se-N bonds of 2.13 (1) and 2.28 (1) angstrom and a Se Re bond of 2.387 (1) angstrom. The oxidation state of the Se(0) atom has been analyzed using calculated atomic charges and the electron localization function (ELF). (C) 2014 Elsevier B.V. All rights reserved.