Phenylantimony(III) Dithiocyanate and the Crystal Structure of K

Article abstract of DOI:10.1039/DT9950001173

It is not possible to isolate phenylantimony dithiocyanate from phenylantimony dichloride (1 mol) and 2 equivalents of potassium thiocyanate in acetonitrile and a salt, K, is isolated instead.A tetrathiocyanate salt, K2, has also been isolated and K can be obtained from SbPh2(SCN) and K(SCN).In K, X-ray diffraction shows that all the thiocyanate groups are S-bonded and the compound has an unusual polymeric structure in which the sulfur atom of one thiocyanate group bridges between pairs of antimony atoms.Co-ordination about antimony is square pyramidal with an apical phenyl group and sulfur atoms of two terminal (Sb-S 2.573, 2.595 Angstroem) and two cis 1,1-sulfur bridging thiocyanate groups (Sb-S 2.938, 2.999 Angstroem) forming the basal plane.All thiocyanate groups are orientated in the same fashion leading to distorted octahedral co-ordination about potassium.

Full text of DOI:10.1039/DT9950001173

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