double bond 是什么意思

中文翻译与英英解释

	【化学】双键。

	double: adj. 1.两倍的，加倍的。 2.双的，二重的，双重的 ...
	bond: n. 〔废语〕农奴；奴隶。 adj. 被奴役的；奴隶的〔 ...

a covalent bond in which two pairs of electrons are shared between two atoms

A double bond in chemistry is a chemical bond between two chemical elements involving four bonding electrons instead of the usual two. The most common double bond, that between two carbon atoms, can be found in alkenes.

例句与用法

	1.	Compounds containing two double bonds are called dienes . 包含两个双键的化合物叫做二烯烃。
	2.	One atom of oxygen is linked to the nitrogen atom by a double bond . 一个氧原子以双键与氮原子相连。
	3.	With exocylic double bonds the effect of strain is in the opposite direction . 环外的双键的张力效应导致相反的结果。
	4.	In the ethyne molecule, a double bond links together the two carbon atoms . 在乙烯分子中是由一个双键将两个碳原子连结在一起的。
	5.	The triple bond does not usually react so vigorously at a carbon-carbon double bond . 三键在反应时一般不象烯烃中的碳-碳双键那样剧烈。
	6.	Regular vinyl addition polymers may be obtained from particularly strained endocyclic double bonds . 由带特殊张力的桥环双键可以得到规整的乙烯类加成聚合物。
	7.	In cases of doubt the changes following hydrogenation, bromination or other chemical attack upon the double bond can be studied . 在有疑问时可以研究双键的氢化，溴化或其他化学反应所引起的变化。
	8.	Depending upon reaction conditions, the product may be a polyketone formed b y addition polymerization of the ketene double bond . 随着反应条件的不同，产物可以是由烯酮的双键加成聚合得到的聚酮。
	9.	An organic compound containing many double bonds 多烯一种包含许多双键的有机化合物
	10.	But that picture of alternating single and double bonds is not the most accurate way of viewing any of these molecules 不过对这些分子来说，这种单双键交替的图像并不是最精确的。

double bond是什么意思

double bond 是什么意思

中文翻译与英英解释

例句与用法