SYNTHESIS AND CRYSTAL-STRUCTURE OF BIS-(TRIPHENYLANTIMONY CATECHOLATE) HYDRATE - NEW SQUARE-PYRAMIDAL ANTIMONY(V) COMPOUND

Reaction between triphenylantimony dichloride and catechol in the presence of ammonia yields the partially hydrated product (Ph3SbO2C6H4)2.H2O, the crystal structure of which has been determined by single-crystal X-ray diffraction methods. The compound, bis(2,2,2-triphenyl-1,3,2-benzodioxastibole) hydrate, crystallized in the monoclinic space group P21/c with cell constants a = 9.78 (1) , b = 21.10 (1) , c = 19.95 (1) , = 105.28 (5), Z = 4. Antimony atoms in both five- and sixfold coordination are present with the central atom in the former being attached to three carbon and two oxygen atoms in a distorted square-pyramidal arrangement. Distortion of this polyhedron arises basically from the presence of the dioxo chelating group. The second polyhedron is distorted octahedral and is derived from the square-pyramidal arrangement above with the addition of a water molecule weakly coordinated in the sixth position. 1980, American Chemical Society. All rights reserved.

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