Novel zwitterionic oxorhenium(V) complexes: synthesis, characterization and crystal structure of [ReOX2(Hdhp)(PPh3)] (X = Cl, Br; H2dhp = 2,3-dihydroxypyridine)

Two novel zwitterionic oxorhenium(V) complexes, [ReOCl2(Hdhp)(PPh3)] (1) and [ReOBr2(Hdhp)(PPh3)] (2) (H2dhp = 2,3-dihydroxypyridine), were synthesized and characterized by infrared spectroscopy, ¹H and 31P nuclear magnetic resonance, elemental analysis and crystal and molecular structure determination by X-ray diffraction on single crystals. Both complexes show distorted octahedral coordination geometry, with the halide ligands arranged in equatorial cis positions, the triphenylphosphine ligand in a trans position to one of the halides and the Hdhp- ligand coordinated in a bidentate form through its oxygen atoms, one in trans position to the oxo-ligand and the other in trans position to the second halide. The nitrogen atom of this ligand is protonated. Compounds 1 and 2 show quite different crystal packing, both influenced by hydrogen bonds of the types N-H...X (X = Cl, Br) and N-H<FONT FACE=Symbol>...</FONT>O.

Bibliographic Details

Main Authors:	Souza,Elizeu J. de, Fernandes,André G. de A., Deflon,Victor M., Bessler,Karl E., Lemos,Sebastião S., Batista,Alzir A., Ellena,Javier, Castellano,Eduardo E., Abram,Ulrich, Hagenbach,Adelheid
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Química 2006
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000800014
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