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首页> 外文期刊>Acta crystallographica. Section C, Structural chemistry. >Two organophosphorus pesticides: methyl parathion and dicapthon
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Two organophosphorus pesticides: methyl parathion and dicapthon

机译：两种有机磷农药：甲基对硫磷和双环己酮

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Structural studies performed in this laboratory of organophosphorus pesticides continue with these related compounds. The –NO2 groups of methyl parathion (systematic name: dimethyl 4-nitrophenyl phosphorothioate, C8H10NO5PS) and dicapthon (systematic name: 2-chloro-4-nitrophenyl dimethyl phosphorothioate, C8H9ClNO5PS) make dihedral angles of 10.67?(8) and 5.8?(1)°, respectively, with the planes of their attached rings, which accompanies angular distortion at the ring C atoms to which the –NO2 groups are attached. Similar distortions are observed at the C atom to which the thiophosphate groups are attached. Significant differences in distances and angles around the phenolic O, versus the –OMe groups, explain why it is the site of hydrolysis for these compounds. A comparison of a torsion angle involving the thiophosphate group and phenolic O atom with similar pesticide structures is given and indicates steric influences on that angle.
机译：在这些有机磷农药实验室中进行的结构研究仍在进行中，涉及这些相关化合物。甲基对硫磷的-NO2基团（系统名称：4-硝基苯基二硫代磷酸二甲酯，C8H10NO5PS）和二癸酮（系统名称：2-氯-4-硝基苯基二甲基硫代磷酸酯，C8H9ClNO5PS）使二面角分别为10.67？（8）和5.8？（ 1）°分别带有其连接环的平面，该平面在与–NO2基团连接的C原子上伴随着角度畸变。在连接硫代磷酸酯基团的C原子上观察到类似的畸变。酚O周围的距离和角度与–OMe基团相比存在明显差异，这解释了为什么这些化合物是水解位点。给出了具有相似农药结构的硫代磷酸酯基团和酚O原子的扭转角的比较，表明了对该角的空间影响。

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