substitution group

substitution group的基本解释

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代换群

与substitution group相关的网络例句 [注：此内容来源于网络，仅供参考]

Receive substitution of an acetyl group; of chemical compounds.

得到乙酰基的替代品；化学混合物。

The results indicate that the type and number of the substituents affect the toxicity of these compounds directly. A nitro group substitution increases the toxicity of the compounds, and on the contrary, an amido group substitution decreases their toxicity. For multi-nitrobenzenes, the toxicity of the o - or p -substituted nitrobenzene is bigger than that of the m -substituted one.

苯环上取代基的类型、数目和取代位置直接影响到标题化合物的毒性大小，强吸电子基如硝基会降低 Q -NO2和 E LUMO大小，使化合物毒性增强，且邻对位硝基取代的毒性高于间位取代；相反，给电子基团氨基的存在则会使化合物的毒性降低。

Finally, we compare o-dimethoxybenzene with other benzene derivatives to discuss the influence of vicinal substitution effect and substituent group effect on the electronic transition, ionization energy and molecule vibration.

最后将把结果与其他苯衍生物的结果相互比较，而进一步得到取代基效应和邻近效应对电子跃迁、游离能及分子振动的影响。

In this thesis, investigations focused on heteropoly acids-catalyzed C-C and C-N bond formation reactions and the synthesis of xanthenediones and acridinediones under thermal conditions are described.1.12-Phosphotungstic acid has been used as an efficient,eco-friendly,and air- and moisture-stable catalyst to promote the direct dehydrative substitution of the hydroxy group of benzylic and allylic alcohols with variousβ-dicarbonyl compounds.

本篇论文主要描述了杂多酸催化下的C-C和C-N键的生成，以及无溶剂直接加热下合成十氢氧杂蒽二酮和9-芳基十氢吖啶二酮。主要内容如下：1。在磷钨酸催化下，1，3-二羰基化合物与醇能够顺利偶合，脱除一分子的水，生成烷基化的1，3-二羰基化合物。反应在甲苯中进行时，二芳基甲醇能与各类1，3-二羰基化合物反应，成率很高；但对于1-苯乙醇，只能得到很低的产率。

In conclusion, a catechol moiety is presumably to be essential for its activity and substitution of the p-hydroxybenzyl group at C-1 position with correct stereochemistry in the isoquinoline molecule makes a great contribution to the activation of beta adrenergic receptors.

本实验初步结果发现，对於去甲基乌药碱分子之药效，catechol基是必备无疑；而异喹啉环的碳－1位置上取代的p-hydroxybenzyl基对於药效有非常大的影响；至於其立体化学的配位是有立体选择性的。

与substitution group相关的网络解释 [注：此内容来源于网络，仅供参考]

substitution formula substitution group：代换群

substitution 代入 | substitution formula substitution group 代换群 | substitution method 代换法

substitution group：代换群

substitution 代入 | substitution group 代换群 | substitution method 代换法

substitution group：置换群

代换;代入 substitution | 置换群 substitution group | 代换规则 substitution rule

regular substitution group：正则代换群

regular variety ^ 正则簇 | regular substitution group ^ 正则代换群 | regular algebra ^ 正则代数

OAZ2 Substitution for trans.type group：业务类型组的代替

OAYZ Asset class: Depreciation areas 资产分类:折旧范围 | OAZ2 Substitution for trans.type group 业务类型组的代替 | ABAD Asset Retire. frm Sale w/ Customer 销售部门用户处的资产报废