tertiary carbon
英 [ˈtɜːʃəri ˈkɑːbən]
美 [ˈtɜːrʃieri ˈkɑːrbən]
网络 叔碳; 叔碳原子又称三级碳原子; 叔碳原子; 三级碳原子; 三级碳
双语例句
- Tertiary amines, although basic, fail to yield amides, presumably because they cannot lose a proton, to stabilize the product after attaching themselves to carbon or to sulfur.
叔胺虽然呈碱性，但不能产生酰胺，这大概是因为当它们连在碳或硫上之后，无法失去一个质子以稳定产物的缘故。 - No. 18-B16 sample from Tertiary out of the study area presents more unique characteristics. Its main peak carbon is C_ ( 31), pr/ ph reaches to 3.31, and it bears strong oxidization.
另外研究区外第三系18B16号样品也显示出更加独特的特征，主峰碳为C31，pr/ph达331，受到了强烈氧化作用。 - The hydrogenation of fatty nitriles to produce alkyl-dimethyl tertiary amines was catalyzed by the Pd/ C catalysts prepared by the PdCl_2 solution carried on the active carbon. The results indicated that the activity of Pd/ C catalysts was continuously decreased as increasing of the used times.
以活性炭为载体，负载氯化钯溶液，制备钯/炭催化剂，在循环使用于催化脂肪腈加氢制备单烷基二甲基叔胺时发现，催化剂活性持续下降。 - In the etherification process of FCC gasoline, reaction temperature has considerable effect on the etherification conversion of tertiary carbon olefins, polymerization conversion of diene and sulfonic shedding rate.
在催化裂化轻汽油醚化过程中，反应温度对叔碳烯烃醚化转化率、二烯烃聚合转化率以及阳离子交换树脂催化剂的脱磺速率有较大的影响。 - High purity tertiary amines can be obtained in one step by catalytic amination of n-atural fatty alcohols ( pure or mixed C12-C18 Carbon fraction) with dimethyl amine.
C（12-18）单碳或混合碳天然脂肪醇经与二甲胺常压催化胺化，可一步反应制得高纯叔胺。 - Some total syntheses of natural products via intramolecular Heck reaction were reviewed focused on how to construct tertiary carbon and quartus carbon chiral centers.
主要介绍了近年来分子内Heck反应在天然产物合成中的应用，重点介绍叔碳和季碳手性中心的构筑。 - For initiator B, when temperature is less than 180 ℃, MAH first reacts with secondary carbon of EB-block, secondly reacts with tertiary carbon; when temperature is higher than 180 ℃, the reaction rate of MAH reacted primary, secondary, tertiary carbon are similar.
对引发剂B，在温度低于180℃之前，仲碳原子最易发生接枝反应，其次是叔碳原子，当温度高于180℃后，伯碳原子、仲碳原子和叔碳原子的反应速率差不多。 - Cumene adsorbed on the basic sites of CaO through H atom on tertiary carbon of the isopropyl group, which caused the weakening of the C-H bond on tertiary carbon of isopropyl group, and was favorable to peroxidation of cumene.
异丙苯通过异丙基叔碳原子上的氢原子与CaO催化剂表面碱中心发生化学吸附，弱化了异丙基叔碳原子上的C&H键，从而有利于催化异丙苯氧化合成CHP的反应。 - It features mild conditions and a broad substrate scope and holds great potential in constructing polycyclic indolines with tertiary and/ or quaternary carbon centers that are widely present in the complex indoline alkaloids.
该反应具有温和的反应条件和广的底物范围，对构筑广泛存在于复杂的吲哚啉生物碱中的具有三碳或四碳的多环吲哚啉骨架，具有极大的潜力。 - The growing secondary and tertiary industries are the main reason of rapidly increasing energy consumption and carbon emissions.
第二、三产业能耗的不断增长是我国能源消费和碳排放增长的主要原因。