460752-06-1Relevant articles and documents
Triphenyl- and Tris(para-tolyl)antimony Dicarboxylates: Synthesis and Structures
Efremov, A. N.,Sharutin, V. V.,Sharutina, O. K.
, p. 335 - 340 (2021/06/07)
Abstract: The reactions of tris(para-tolyl)antimony (4-МеС6H4)3Sb with chloroacetic acid and of triphenylantimony Ph3Sb with 3,4,5-trifluorobenzoic and 2,3-difluorobenzoic acids in the presence of tert-butyl hydroperoxide afford triarylantimony dicarboxylates Ar3Sb[OC(O)R]2, where Ar = p-Tol, R = CH2Cl (I), Ar?= Ph, C6H2F3-3,4,5 (II), and C6H3F2-2,3 (III). According to the X-ray diffraction data (CIF files CCDC nos. 1883320 (I), 1979844 (II), and 1980334 (III)), the Sb atoms in compounds I?III have the coordination of a trigonal bipyramid. The OSbO axial angles are 174.47(6)° (I), 173.98(7)° (II), and 175.98(6)° (III). The Sb?O and Sb?С bond lengths are 2.145(2), 2.143(2), and 2.104(2)–2.109(2) ? in compound I; 2.121(2), 2.121(2) and 2.098(2)–2.112(3) ? in compound II; and 2.1302(18), 2.1132(18), and 2.109(3)–2.117(3) ? in compound III. The intramolecular Sb???O distances with the carbonyl oxygen atom (3.054(3) and 3.080(3) ? (I), 3.033 ? (II), and 2.959(3) and 3.054(2) ? (III)) are less than the sum of the van der Waals radii of Sb and O. The structural organization of the compounds is due to hydrogen bonds of the О???H and F???H types, СН???π and F???π interactions, and stacking effect.
