Molecular structure regulation and herbicidal activity of dibutyltin aryloxyacetate complexes

文献类型： 外文期刊

第一作者： Tan, Yuxing

作者： Tan, Yuxing;Huang, Huifen;Zhang, Chengwei;Jiang, Wujiu;Yuan, Sitian

作者机构：

关键词： Organotin carboxylates; Aryloxyacetic acid; Synthesis; Crystal structure; Herbicidal activity

期刊名称：JOURNAL OF MOLECULAR STRUCTURE （ 影响因子：4.0； 五年影响因子：3.5 ）

ISSN： 0022-2860

年卷期： 2025 年 1320 卷

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收录情况： SCI

摘要： Six dibutyltin aryloxyacetate complexes [(X-C6H4OCH2COO)(SnBu2)2(mu 3-O)(OMe)]2 6 H 4 OCH 2 COO)(SnBu 2 ) 2 (mu 3 -O)(OMe)] 2 ( A1, B1 ), [(XC6H4OCH2COO)2(SnBu2)2(mu 3-O)]2 6 H 4 OCH 2 COO) 2 (SnBu 2 ) 2 (mu 3 -O)] 2 ( A2, B2 ), and [(X-C6H4OCH2COO)2SnBu2] 6 H 4 OCH 2 COO) 2 SnBu 2 ] ( A3, B3 ) were synthesized and characterized by IR, NMR, HRMS, and TGA techniques. The molecular structure of complexes A1, A3 and B1-B3 B3 was confirmed by single-crystal X-ray crystallography. Complexes A1, B1, A2 , and B2 are dimeric carboxylate tetraorganodistannoxanes, displaying a "ladder-like" molecular arrangement. The aryloxyacetate ligands in A1 and B1 adopt a monodentate mode, while they function as bridging coordination ligands in A2 and B2 . Complexes A3 and B3 represent dibutyltin carboxylates with crystallographically imposed two-fold symmetry, with the aryloxyacetate ligands adopting a bidentate mode. Aryloxyacetic acids demonstrate a propensity for assuming various coordination modes, leading to the formation of diverse molecular architectures in organotin carboxylates. In addition, complex B1 exhibits polymorphism. Echinochloa crus-galli and Portulaca oleracea L. were used as target organisms for herbicidal activity testing using a petri dish method. It was found that they have a significant inhibitory effect on weed roots and stems at 200 mu mol/L, and the structure-activity relationship analysis revealed the important influence of substituent types and complex structures on their activity.

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