正碳离子浓度对烯烃的氢转移反应起决定性作用。

The concentration of carbenium ions plays key role in the hydrogen transfer ability of olefins.

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应用正碳离子聚合的方法合成新型聚异丁烯遥爪预聚物。

The new telechelic prepolymers of polyisobutylene have been synthesized by the carbocationic polymerization.

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多气氛控制脱除成型剂、正碳以及防止钴液相挥发和快速冷却；

Control of debinding atmosphere, carbon and preventcobalt liquid volatilization and rapid cooling;

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And so now I have hydrogens at the four corners of a tetrahedron.

放在碳正四面体,的四个角上。

麻省理工公开课 - 固态化学导论课程节选

If we look at our last structure here where we have nitrogen the middle, we can also figure out all those formal charges, and in this case we have plus 1 on the nitrogen, we have minus 2 on the carbon, and then we end up with a 0 on the sulfur there.

如果我们来看看最后一个结构,在中间的原子是氮，我们同样可以计算出所有的形式电荷，而在这种情况下，氮为正一，碳为负二，而最后硫为零。

麻省理工公开课 - 化学原理课程节选