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X-RAY CRYSTAL STRUCTURE ANALYSES AND ATOMIC CHARGES OF COLOR FORMER AND DEVELOPER .1. COLOR DEVELOPERS

机译:彩色显影剂和显影剂的X射线晶体结构分析和原子电荷1。彩色开发者

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摘要

The crystal and molecular structures of 2,2-bis(4-hydroxyphenyl)propane (Bisphenol A, BPA) (1), benzyl 4-hydroxybenzoate (2), 1,7-bis(4-hydroxyphenylthio)-3,5-dioxaheptane (3) and 4-hydroxyphenyl 4-isopropoxyphenyl sulfone (4) have been determined by X-ray crystal structure analysis. Theoretical calculations of the steric hindrance and semiempirical quantum chemical calculations to determine the color characteristics have been carried out. It is clear that the energy barriers for the variation of the orientation of phenol group in 1 to 4 are due to steric hindrance caused by the other moiety and the peak profiles are due to repulsive interactions of the other moiety. Net atomic charges on the hydrogen of the OH group are larger than those on the other atoms in the molecules. This high electron charge of the para orientation will cause the different thermosensitivity and stabilization. [References: 30]
机译:2,2-双(4-羟基苯基)丙烷(双酚A,BPA)(1),4-羟基苯甲酸苄酯(2),1,7-双(4-羟基苯硫基)-3,5-的晶体和分子结构通过X射线晶体结构分析已经确定了二恶庚烷(3)和4-羟基苯基4-异丙氧基苯基砜(4)。已经进行了空间位阻的理论计算和确定颜色特性的半经验量子化学计算。显然,改变1-4中酚基团取向的能垒是由于另一部分引起的空间位阻,而峰分布是由于另一部分的排斥相互作用引起的。 OH基团氢原子上的净原子电荷大于分子中其他原子上的净原子电荷。对位取向的这种高电子电荷将引起不同的热敏性和稳定性。 [参考:30]

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