Crystal and molecular structure of [acetone benzoylhydrazonido(1–)-N′O]dichloro-oxo(triphenylphosphine)rhenium(V)

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Abstract
The crystal and molecular structures of the title compound have been determined from single-crystal X-ray diffractometer data. The crystals are monoclinic with a= 15.610, b= 18.510, c= 10.650 Å, β= 114.68°, space group P21/a, and Z= 4. The structure has been solved by Patterson and Fourier methods, and refined by least squares, using 2 678 independent reflections, to an R value of 0.052. The monomeric molecules have distorted octahedral co-ordination. The benzoylhydrazonide chelate adopts a predominantly enolic structure and there is no evidence for the incorporation of the metal into any delocalised system. The Re–O distance [2.013(7)Å] is shorter than the Re–N distance [2.127(10)Å] and does not appear to have been influenced by the multiply bonded oxo-function [Re[graphic omitted]O 1.685(8)Å]trans to it. The remaining metal–ligand distances are Re–Cl 2.388(3)(trans to P) and 2.344(4)Å(trans to N) and Re–P 2.472(2)Å

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