Reza Md Yeamin, Hossain Md Motahar, Karim Md Rabiul, Tarafder Md Tofazzal Hossain, Hughes David L
Acta Crystallogr Sect E Struct Rep Online. 2010 Jan 9;66(Pt 2):m116-7. doi: 10.1107/S1600536809054853.
The coordination around the Sb atom in the title compound, (C(6)H(16)N)[Sb(C(14)H(10)O(3))(2)], is fourfold in a pseudo-trigonal-bipyramidal pattern in which one of the equatorial sites is occupied by the stereoactive lone pair of electrons. The four ligating atoms comprise the hydoxylate and carboxyl-ate O atoms from two independent benzilate ligands, each of which forms a five-membered chelating ring, spanning an axial and an equatorial site about the Sb atom. The hydroxy-late atoms occupy the two equatorial sites, and the carboxyl-ate atoms are in the pseudo-axial sites; the O-Sb-O angle is 147.72 (5)°. One carboxyl-ate group shows quite different bond lengths from those of the other group; one O atom is clearly the carbonyl atom and the other O atom the hydroxy-late atom. In the other ligand, there is less distinction in the C-O bonds. This is presumably related to the carbonyl O atom being the acceptor atom of a strong N-H⋯O hydrogen bond, which links the ammonium cation to the Sb complex anion.
在标题化合物(C₆H₁₆N)[Sb(C₁₄H₁₀O₃)₂]中，Sb原子周围的配位呈四重配位，具有假三角双锥构型，其中一个赤道位置被有立体活性的孤对电子占据。四个配位原子包括来自两个独立二苯乙醇酸酯配体的羟基和羧酸根O原子，每个配体形成一个五元螯合环，跨越Sb原子周围的一个轴向位置和一个赤道位置。羟基原子占据两个赤道位置，羧酸根原子处于假轴向位置；O-Sb-O角为147.72 (5)°。一个羧酸根基团的键长与另一个基团的键长有很大不同；一个O原子明显是羰基原子，另一个O原子是羟基原子。在另一个配体中，C-O键的差异较小。这大概与羰基O原子作为强N-H⋯O氢键的受体原子有关，该氢键将铵阳离子与Sb络合阴离子相连。
