Abstract
The reactions of tetraphenylstibium nitrate with nitric acid and of tetraphenylstibium acetate with acetic acid yield adducts Ph4SbONO2 · HNO3 (I) and Ph4SbOC(O)CH3 · CHH3COOH (II). According to X-ray diffraction data, the antimony atom in [Ph4Sb]+[O2N-O···H···O-NO2]− has a tetrahedral coordination. The CSbC bond angles and Sb-C bond lengths vary within 108.04(6)°–109.75(4)° and 2.096(1)–2.098(1) A, respectively. The anion includes the intermolecular hydrogen bond O(1)–H(1)···O(1)″: the O(1)-H(1), H(1)···O(1)″, and O(1)···O(1)″ distances are 0.91(4), 1.56(4), and 2.460(2) A, respectively; and the OHO angle is 169(5)°. The nitrate groups are usually planar. Complex II also contains the intermolecular hydrogen bond with the following parameters: O(3)-H(3), 0.92 A; H(3)···O(2), 1.68 A; and O(3)···O(2) 2.594 A; the O(2)H(3)O(3) angle is 172.1°. This H-bond noticeable changes the coordination polyhedron of the antimony atom compared to that in tetraphenylstibium acetate.
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