Hexakis(4-acetylpyridinium) octadecachloridotetraantimonate(III)

Abstract

Key indicators: single-crystal X-ray study; T = 298 K; mean (C-C) = 0.006 Å; R factor = 0.030; wR factor = 0.070; data-to-parameter ratio = 22.2.The title compound, (C 7 H 8 NO) 6 [Sb 4 Cl 18 ], contains centrosymmetric hexaanions built up from four vertex-sharing alternating SbCl 5 square-based pyramids and highly distorted SbCl 6 octahedra when long (<3.2 Å ) 'secondary' Sb-Cl interactions are taken into account. The inter-polyhedral Sb-Cl bonds define a square-shape. In the crystal, the components are linked by N-HÁ Á ÁCl, C-HÁ Á ÁCl and C-HÁ Á ÁO hydrogen bonds, generating a three-dimensional network. Table 1 Selected bond lengths (Å ). Related literature

Synthesis and structures of Cu-Cl-M adducts (M=Zn, Sn, Sb)

“…Although a limited number of other examples of [Sb 2 Cl 9 ] 3-have been structurally characterized (Ishihara et al, 1992;Willey et al, 1996;Wojtas and Jakubas, 2004;Gagor et al, 2008;Fu, 2010;Borisov et al, 2012), this is the first example of it acting as a ligand to coordinate another metal center. In 8, copper again adopts a distorted tetrahedral coordination, in which the bond to the bridging Cl(5) [2.3979(11) Å] is shorter than that to the hydrogen-bonded Cl(4) [2.5931(12) Å]; in addition, the Cu-PMe 3 bonds are the longest noted in this study [2.2391(12), 2.2337(12) Å].…”