网络释义专业释义英英释义
...双键 复分解 闭环反应 苯并吡喃 氨基酸 肽 内酰胺 磺酰胺 磷杂环化合物 [gap=475]Keywords】: ORGANIC SYNTHESIS,DOUBLE BONDS,DOUBLE DECOMPOSITION,RING CLOSURE REACTION,BENZOPYRAN,AMINO ACID,PEPTIDE,LACTAM..
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saturation of double bonds 双键的饱和
end double bonds 末端双键
carbon carbon double bonds 碳碳双键化合物
dienes with conjugated double bonds 共轭二烯属
Some Facts about Double Bonds 碳碳双键的特征
double-bonds 双键
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双键 - 引用次数：60
First,we suggested that the reaction between polyvinylalcohol and conjugated olefine aldehyde includes two kinds ofmechanism which are 1,2-and 1,4-addition reaction,because theconcentration of carbonyl group decreased faster than that ofcarbon-carbon double bonds in the reaction.
首先，根据聚乙烯醇与共轭烯醛反应过程中醛基含量比碳碳双键含量减少得快的特点，提出该反应为1，2-加成和1，4-加成方式并存的机理，并用红外光谱和核磁共振氢谱证实了该机理。
参考来源 - 多羟基化合物缩共轭烯醛的研究
·2,447,543篇论文数据，部分数据来源于NoteExpress
double bond
- n. a covalent bond in which two pairs of electrons are shared between two atoms
以上来源于: WordNet
双语例句原声例句权威例句
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Buckyballs, as they became known colloquially, are football-shaped molecules made of 60 carbon atoms linked by single and double bonds.
富勒烯通常成为巴克球，是一种由60个碳原子以单键和双键相连组成的足球形碳单质。
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Biocatalytic reduction of the carbonyl groups or the carbon-carbon double bonds of the compounds has been utilized as a method for transforming the prochiral substrate into chiral product.
生物催化的还原反应能使分子内的羰基或碳-碳双键立体选择性的还原，将潜手性底物转化为手性产物，在不对称合成中有着重要的作用。
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Compounds containing two double bonds are called dienes.
包含两个双键的化合物叫做二烯烃。
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One thing that I want to mention that is really important is once you have double bonds, what happens between those two atoms in the molecule is they can no longer rotate in relation to each other.
我要提醒你们的非常重要的一点事,一旦有了双键，分子中的两个原子,就不能相对旋转了。
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And something that we'll see later on is that triple bonds, for example, are going to be stronger than a corresponding double bond or a corresponding single bond.
而我们以后还会看到三键，举例来说，应该更强，相较于相应的双键,或者相应的单键来说。
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That tells you something about the physical chemistry of the molecule; that it's these hydrogen bonds that hold the double strands and I can break those down under certain conditions.
我们从中可以知道一些,DNA分子的理化特点,双链是由氢键连接在一起,在一定条件下这些氢键可以断裂
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