碳碳双键是指由碳的一个2s亚层和两个2P亚层杂化为三个sp2杂化轨道。这三个sp2杂化轨道分布在同一平面上。键能大于单键。
碳碳单键、双键和叁键 Carbon-Carbon Covalent Bonds
We study on the selective reduction of the carbon-carbon double bonds ofα,β-unsaturated esters, amides, ketones. The saturated compounds have been characterized by elemental analysis, IR, 1H-NMR.
在查阅文献的基础上,我们对α,β-不饱和酯、酰胺、酮的碳碳双键还原进行了研究,还原后的饱和化合物的结构经过元素分析、IR、1H-NMR的确证。
参考来源 - α,β·2,447,543篇论文数据,部分数据来源于NoteExpress
让我们来看一看碳碳双键的情况,例如在乙烷里,我们有个双键。
So let's take a look at what actually happens if we're talking about a carbon-carbon double bond, we're going to have a double bond.
结果表明:在此条件下加氢,产物碳碳双键含量减少,其综合性能特别是高温耐氧化性得到了显著提高。
The result shows that under the optimal conditions, the content of double carbon bond in product reduced, and the comprehensive properties, especially, the oxidative resistance improved greatly.
关环转换反应是形成碳碳双键的重要反应之一,即双烯化合物在金属碳烯催化下关环得到环烯类化合物。
Ring closing metathesis (RCM) of dienes to cycloalkene provides an important tool for C-C double bond formation catalyzed by metal carbene.
So let's take a look at what actually happens if we're talking about a carbon-carbon double bond, we're going to have a double bond.
让我们来看一看碳碳双键的情况,例如在乙烷里,我们有个双键。
So I show that here, so in green, you have what's called a carboxcylic acid group, a c o o h, which gets converted by s o c l 2 to a c double bond o c l or an acid chloride.
我在这里用绿色表示,我们所说的羧酸族化合物,碳,氧,氧,氢,它被亚硫酰氯转化为,一个碳氧双键与碳氯单键组成的酰氯。
So for b 2, which is a single bond, that's 289 kilojoules per mole to break it, and it takes us more energy to break this double bond for carbon, which is 599 kilojoules per mole.
对于B2,它是单键,需要289千焦每摩尔来打破它,而对于碳双键,打破它要更多的能量,等于599千焦每摩尔。
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