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在乙醇-苯溶剂中,对碘苯甲酸分别与三苯基氢氧化锡、二丁基氧化锡反应,合成了2个有机锡对碘苯甲酸酯,Ph3Sn(p-IC6H4O2)(1)和{[n-Bu2Sn(p-I-C6H4O2)]2O}2(2)。经IR、1H NMR、元素分析和X射线单晶衍射对配合物进行了表征。配合物1属三斜晶系,空间群为P1,中心锡原子与苯基碳原子、羧基氧原子构成畸型四面体,并且分子间通过氢键和C-I…π共同作用形成二聚体结构;配合物2属单斜晶系,空间群为C2/c,配合物是以Sn2O2构成的平面四元环为中心的二聚体结构,并且分子间通过I…I共同作用形成了一维链状结构。热重分析表明,配合物1和2在230℃以下具有良好的热稳定性。配合物1、2对杂草刺苋(Amaranthus spinosus)、马齿苋(Portulaca oleracea)的抑制活性大于对农作物绿豆的影响,且配合物1的抑制活性高于配合物2的抑制活性,为刺苋、马齿苋除草剂研究提供了一种方法。
In ethanol-benzene solvent, p-iodobenzoic acid was reacted with triphenyltin hydroxide and dibutyltin oxide respectively to synthesize two organotin p-iodobenzoates, Ph3Sn (p-IC6H4O2) {[n-Bu2Sn (pI-C6H4O2)] 2O} 2 (2). The complexes were characterized by IR, 1H NMR, elemental analysis and single crystal X-ray diffraction. Complex 1 belongs to the triclinic system with space group P1, central tin atom and phenyl carbon atom, and carboxy oxygen atom form a distorted tetrahedron, and the intermolecular hydrogen bond and CI ... π form a dimer structure. Coordination 2 belongs to the monoclinic system with space group C2 / c. The complex is a dimeric structure centered on a plane quaternary ring composed of Sn2O2, and the one-dimensional chain structure formed by the intermolecular interaction of I ... I . Thermogravimetric analysis showed that complexes 1 and 2 have good thermal stability below 230 ℃. The inhibitory activities of complex 1 and 2 on Amaranthus spinosus and Portulaca oleracea were higher than those on mung bean and the inhibitory activity of complex 1 was higher than that of complex 2. Amaranth, purslane herbicide research provides a way.