Assembly of triorganotin chloride with selenite ligands to macrocyclic, zigzag, helical, and linear structures: syntheses, characterizations, and crystal structures of [R3Sn(O2SeC6H4-4-Et)] n and [R3Sn(O2SeC6H4-2-Et)] n (R = Me, C6H5) complexes
作者:Chunlin Ma、Zhenxing Li、Qianli Li、Fei Wang、Rufen Zhang、Qingfu Zhang
DOI:10.1007/s11224-013-0368-0
日期:2014.6
Four new triorganotin(IV) complexes, [R3Sn(O2SeC6H4-4-Et)]4 (R = Me 1), [R3Sn(O2SeC6H4-4-Et)] n (R = Ph 2), [R3Sn(O2SeC6H4-2-Et)] n (R = Me 3; Ph 4) have been synthesized by the treatment of 4-ethylbenzeneseleninic acid, 2-ethylbenzeneseleninic acid, and the corresponding triorganotin(IV) chloride with sodium ethoxide in methanol. All of the complexes were characterized by elemental analysis, FT-IR, NMR (1H, 13C, and 119Sn) spectroscopy, TGA, and X-ray crystallography. Crystal structures show that all of the complexes are generated by the bidentate oxygen atoms and the five-coordinated tin centers with trigonal bipyramid geometry. The structural analyses reveal that complex 1 has a centrosymmetric tetranuclear triorganotin selenite with 16-membered macrocycle, which is formed by trimethyltin and ligand alternate linking. A series of C–H···O and π–π stacking interactions in complex 1 play an important function in the supramolecular aggregation. Complex 3 has two 1D spring-like chiral helical chains and crystallizes in the monoclinic space group P21, which is chiral. Complex 2 and 4 are both 1D infinite neutral chain polymers and complex 2 forms a 2D supramolecular framework through intermolecular C–H···O interactions.
四种新的三有机锡 (IV) 配合物,[R3Sn(O2SeC6H4-4-Et)]4 (R = Me 1)、[R3Sn(O2SeC6H4-4-Et)] n (R = Ph 2)、[R3Sn(O2SeC6H4-2) -Et)] n (R = Me 3; Ph 4) 通过在甲醇中用乙醇钠处理 4-乙基苯硒酸、2-乙基苯硒酸和相应的氯化三有机锡(IV) 来合成。所有配合物均通过元素分析、FT-IR、NMR(1H、13C 和 119Sn)光谱、TGA 和 X 射线晶体学进行了表征。晶体结构表明,所有配合物都是由二齿氧原子和具有三角双锥几何形状的五配位锡中心生成的。结构分析表明,配合物1具有中心对称的16元大环四核三有机锡亚硒酸盐,由三甲基锡与配体交替连接而成。配合物1中一系列C-H···O和π-π堆积相互作用在超分子聚集中发挥着重要作用。配合物3具有两个一维弹簧状手性螺旋链,并在单斜空间群P21中结晶,该空间群是手性的。配合物2和配合物4均为一维无限中性链聚合物,配合物2通过分子间C-H·O相互作用形成二维超分子骨架。