Preparation and crystal structure of dioxotetrachloro-(N,N′-ethylenebis(salicylideneiminato)bis(triphenylphosphine)-dirhenium(V) dichloromethane solvate

1978 
Abstract The complex ReOCl 3 (PPh 3 ) 2 reacts with bis(trimethylsilyl)- N,N′ -ethylenebis(salicylideneiminato) to give a complex in which the “salenligand bridges two rhenium atoms, viz. dioxotetrachloro( N,N′ -ethylenebis(salicylideneiminato)bis(triphenylphosphine)dirhenium(V). Its crystal and molecular structure have been determined by a single crystal X-ray diffraction analysis. The crystals are monoclinic space group P 2 1 / c with four molecules in a cell of dimensions a 18.609(4), b 16.286(4), c 18.600(4)A and β 105.00(2)°. Least squares refinement of 5867 observed reflections measured on a diffractometer reached R = 0.045. The “salenligand bridges two rhenium atoms which present a distorted octahedral coordination. The two halves of the molecule are approximately related by a non-crystallographic two fold axis perpendicular to the CC bond of the ethylenic group.
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