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1)  length of covalent bond
共价键键长
2)  bond angle of covalent bond
共价键键角
3)  bond energy of covalent bond
共价键键能
4)  covalent bond
共价键
1.
This pa per mainly sums up the formation conditions of different type covalent bonds, it s effects on the quality of compounds and its change rule in element periodic ta ble.
无机化学中常见共价键有双电子σ键(包括σ配键)、双电子π键、单电子键、三电子键、离域π键、多中心键、反馈π键(包括d-pπ键、d-dπ键和π←dπ键)等。
2.
The result showed that Si--Si covalent bond eAsts in the melt of eutectic and hyper--eutectic alloy and Sr has capability to weaken the coto bond.
结果表明,在共晶及过共晶的合金的液态结构中,存在着Si—Si共价键,Sr有削弱这些共价键的倾向。
3.
Through analysis of four methods for estimation of the percentage of partial ionic property of the two elements in covalent bond,we found the way for estimation of partial ionic property as a new supplemenl to the method for estimation of the percentage of the partial ionic properties by the strength of electronega tivity.
通过对四种估算二元异原子共价键的离子性百分数的方法讨论,初步找到估算共价键的部分离子性的思路和方法。
5)  non-covalent bond
非共价键
1.
Non-covalent bond based self-assembly organic functional materials;
非共价键自组装有机功能材料
2.
The development of photoluminescent materials was reviewed in thisdissertation, and we designed a novel non-covalent bond self-assembled “molecularduplex” with photoluminescent group.
本文综述了有机光致发光材料的研究现状,设计了一种新的非共价键自组装“分子双股”,通过酯基引入 1,8-萘酰亚胺发光片段对“分子双股”进行功能化。
6)  strong covalent bond
强共价键
1.
Through comparing the valence electron structure in austenitic crystal cell among all kinds of alloys,the strong covalent bond of austenitic crystal cell valence electron structure is thought as a main factor to influence the stability of austenite.
对各种合金奥氏体晶胞价电子结构进行比较后,认为影响合金奥氏体稳定性的主要因素是奥氏体晶胞价电子结构的强共价键。
补充资料:共价键键长
分子式:
分子量:
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性质:以共价键相结合的两个原子的平衡核间距离称为该共价键的键长。A、B两原子间共价键的键长可按下式计算rA-B=rA+rB-9△其中rA和rB分别为原子A和原子B的共价半径,△是A和B的电负性差。同核双原子分子的键长即两个原子的共价半径之和,当键型发生变异,例如有离域π键或其他复键时,不能再用共价单键半径计算键长。当键的性质发生变化时,键长也会变化。例如C—C键,由于成键的杂化轨道不同、超共轭效应不同,键长也不同。

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