爱词霸英语   汉语   手机版   软件版下载 | English
每日一句:正在加载...
1.By Using cyclopentadiene and carbon=carbon bond compounds as raw materials,based on Diels-Alder reaction,norbornene derivatives were prepared,such as 5-phenyl-2-nobornene,5-cyano-2-nobornene,5-carboxyl-2-nobornene and 5-nobornene-2-hydroxybutyrate.
本文研究了以环戊二烯和其它含有双键的化合物为原料,通过Diels-Alder反应,合成了降冰片烯类化合物:5-苯基-2-降冰片烯、5-腈基-2-降冰片烯、5-羧基-2-降冰片烯。收藏指正
2.The Dissociation of Carbon-Hydrogen Bond of MMA by CO_2 Laser
MMA单体在CO_2激光辐照下的键离解收藏指正
3.Any of a series of open-chain hydrocarbons with a carbon-carbon triple bond and the general formula CnH2n-2.
炔,炔烃,链炔有三链的一系列开链烃中的任一种,其分子式为CnH2n-2。收藏指正
4.Any of a class of unsaturated open-chain hydrocarbons such as ethylene, having the general formula CnH2n; an alkene with only one carbon-carbon double bond.
烯烃任何一类不饱和的开链氢化合物,如乙烯,总分子式为CnH2n;仅有一个双链的链烯收藏指正
5.Recent progress in indium (III) compounds promoted organic reactions and their application in organic synthesis is reviewed in this paper, in which special efforts have been given to carbon-carbon and carbon-heteroatom bond formation reactions.
摘要综述了近年来三价铟化合物促进的多种有机反应及其在有机合成中的应用,其中重点讨论了三价铟化合物促进下的键和-杂原子键的形成反应。收藏指正
6.δ??C-H?973 cm~-1?, two hydrogens on Carbon?Carbon double bond form an AB two spin system and three hydrogens in α?furfuryl ring form an AMX three spin system in ?1H NMR. ?
δC—H(面外)973cm-1,两个双键氢原子构成AB二旋系统,呋喃环中三个氢原子构成AMX三旋系统.收藏指正
7.Lewis base association and dissociation, metal-carbon σ bond thermolysis and its CO insertion reaction was briefly discussed using U(C_5H_5)_3X (X=NCS~-, Cl~-and R~-) as examples.
考虑到使惰性配位体压缩将产生很大的空间势垒,以UCp_3X为例说明了Lewis碱的配合与解离,金属-σ键的热分解以及一氧化插入反应的可能性。收藏指正
8.Roman spectrum shows that the main component is non crystalline carbon with SP2 bond.
喇曼谱分析表明 ,薄膜的主要成分为SP2 非晶 .收藏指正
9.(chemistry) used of a compound (especially of carbon) containing atoms sharing more than one valence bond.
(化学)用来指化合物(特别是化合物),含有共享一个以上化合物的原子。收藏指正
10.A CFC molecule consisting of chlorine, fluorine, arid carbon atoms can be broken apart by ultraviolet light, which destroys the bond between a chlorine atom and a carbon atom.
一个由氯、氟和组成的氯氟化分子能被紫外线光分解,这破坏了一个氯原子和一个原子之间的化学键。收藏指正
尝试查询