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The reaction of equimolar amounts of pentaphenylantimony with carboranedicarboxylic acid in toluene lead to tetraphenylantimony carborane carboxylate (1) in high yield. When using 2:1 M ratio of initial reagents, bis(tetraphenylantimony) carborane bis(carboxylate) (2) was obtained in 94% yield. Sb atoms in 1 and 2 form the distorted trigonal-bipyramidal coordination with carboxylate and phenyl ligands...