Reactions of Tricymantrenylantimony with Halogens. Synthesis and Structure of Tricymantrenylantimony Dihydroxide

Abstract

Tricymantrenylantimony dibromide [C5H4Mn(CO)3]3SbBr2 and dichloride [C5H4Mn(CO)3]3SbCl2 were synthesized by the reaction of tricymantrenylantimony with bromine and chlorine in chloroform; the products are transformed into tricymantrenylantimony dihydroxide [C5H4Mn(CO)3]3Sb(OH)2 by the action of potassium hydroxide in ethanol. Antimony atoms in the dihydroxide have a distorted trigonal–pyramidal coordination with oxygen atoms in axial positions [OSbO 175.66(8)°; Sb–O 1.987(2), 2.049(2), Sb–C 2.086(2), 2.101(2), and 2.105(2) A].