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) Å].