Synthesis and structural characterization of new ladder-like organostannoxanes derived from carboxylic acid derivatives: [C₅H₄N(p-CO₂)]₂[Bu₂Sn]₄(μ ₃ -O)₂(μ ₂ -OH)₂, [Ph₂CHCO₂]₄[Bu₂Sn]₄(μ

Abstract

Three types of ladder-like organostannoxanes, [C5H4N(p-CO2)]2[Bu2Sn]4(μ 3-O)2(μ 2-OH)2 (1), [Ph2CHCO2]4[Bu2Sn]4(μ 3-O)2 (2), and [(p-NH2)-C6H4-CO2]2[Bu2Sn]4(μ 3 -O)2(μ 2 -OH)2 (3), have been synthesized and characterized using elemental analyses, Fourier-transform infrared spectroscopy, nuclear magnetic resonance (1H, 13C) experiments, and, for 1 and 2, single-crystal X-ray diffraction analysis. X-Ray diffraction discloses that complexes adopt tetranuclear tin(iv) ladder-like structures containing two (1) or four (2) deprotonated ligands. The essential difference between their molecular structures is that in 2 there are four carboxylate ligands, while in 1 and 3 there are two. The crystal structure of 1 reveals them to be a tetranuclear structure containing a three-rung-staircase Sn4O4 core. The Sn4O4 cluster consists of a ladder of four Sn2O2 units. For 2, the structure is a tetranuclear centrosymmetric dimer of an oxoditin unit having a central four-member ring. In this complex, the central Sn2O2 core is fused with two four-member and two six-member rings. In the structures, there are two types of tin ions arranged in distorted trigonal bipyramid geometry or octahedron geometry. A series of O–H⋯N, C–H⋯O, and C–H⋯π intermolecular hydrogen bonds in these complexes play an important function in the supramolecular, or two-dimensional network structures are formed by these interactions.

Ladder-like Organostannoxane: Synthesis and Crystal Structure of the Second Polymorph {[(C6H5)2Sn]2[(C6H5)2ClSn]2(μ3-O)2(μ2-OH)2}∙[DMF]2

“…Coordination polymers, isolated from an appropriate reaction of selected metal centers and multidirectional ligands, aroused an intriguing interest to researchers due to the potential applications as well the fascinating structures they display [1][2][3][4][5][6][7][8][9]. Organotin(IV) carboxylate based complexes and derivatives have been widely investigated because they are a class of compounds affording very interesting topologies, and a variety of structural types such tetramers and oligomeric ladders [10][11][12]. The organostannoxanes in particular, attracted an incommensurable interest because of the diverse structures they exhibit [13][14][15][16].…”

“…Very few compounds closely related to bis-[chloro-(µ 2 -hydroxo)-(µ 3 -oxo)-tetraphenyl-ditin] ladder, comprising solvate molecules were otherwise investigated [29][30][31][32]. Since decades, the Dakar group has been involved in the investigation of new organotin(IV) based materials [33][34][35][36][37][38], and more recently, singularly in ladder-like organostannoxanes derived from carboxylic acid [10]. In our course of isolating and investigating new organotin(IV) hybrid materials, we report in this work the synthesis and crystal characterization of the second polymorph organostannoxane, (1).…”