Structural Features of Triorganylantimony Dicarboxylates R_3Sb [OC(O)R')]_2

摘要

Triphenylantimony dibenzoate Ph_3Sb(O_2CPh)_2,triphenylantimony bis (methylbenzoates) Ph_3Sb(O_2CC_6Me-n)_2(n=2,4),and tri-p-tolylantimony bis (trichloacetate) p-Tol_3Sb(O_2CCCl_3)_2,whose Sb atoms have trigonal bipyramidal coordiantion,were studied using X-ray diffraction analysis.The Sb-O bond lengths are equal to 2.119(2) and 2.144 (2);2.115(2); 2.118(2) and 2.127(2); 2.133(2) A,the Sb...O(=C) intramolecular contactsa re equal to 2.797 (2) and 2.698 (2);2.84 (2);2.814 (2) and 3.030 (2);3.119(2) A,respectively.The follwoing correlation was found in the structures of triorganylantimony dicarboxylates:the shorter the Sb...O(=C) distances,the greater the equatorial angle on the side of the intramolecular contacts.