Synthesis, Crystal Structure, Spectroscopic, and Herbicidal Activity Studies of a Series of Designed Fluoro-Functionalized Phenylimido Derivatives of Hexametalate Cluster

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• 作者：Sijia Xue ; Changsheng Xiang ; Yongge Wei ; Zhenwei Tao ; An Chai ; Wangdong Bian ; Zhu Xu
• 刊名：Crystal Growth & Design
• 出版年：2008
• 出版时间：July 2008
• 年：2008
• 卷：8
• 期：7
• 页码：2437 - 2443
• 全文大小：600K
• 年卷期：v.8,no.7(July 2008)
• ISSN：1528-7505

文摘

Four novel fluoro-functionalized arylimido-substituted hexamolybadates, (n-Bu₄N)₂[Mo₆O₁₈(NAr)] (Ar = 2-CH₃-4-FC₆H₃ (1), 3-CH₃-4-FC₆H₃ (2), 4-FC₆H₄ (3), or 2-FC₆H₄ (4)), in which fluorinated phenylimido group linked to an Mo of hexamolybdate by a Mo−N triple bond, have been prepared via the DCC (N,N′-dicyclohexylcarbodiimide) dehydrating protocol of the reaction of α-octamolybdate ion with 2-methyl-4-fluoroaniline hydrochloride, 3-methyl-4-fluoroaniline hydrochloride, 4-fluoroaniline hydrochloride, or 2-fluoroaniline hydrochloride in anhydrous acetonitrile. All these compounds have been characterized by elemental analysis, UV−vis, IR, ¹H NMR, and single-crystal X-ray diffraction analyses. The preliminary biological activity test indicated that these compounds display potent herbicidal activity, in particular against the roots of some tested plants (such as Brassica campestris L., Eclipta prostrata L., Echinochloa crusgallis L., and Cirsium japonicum DC.).