活性中间体（或中间体/活性中间物）是化学反应过程中产生的存在时间短，能量高，高反应性的分子。当反应产生时会快速的转变成更稳定的分子，只有在特殊情况下才能将其分离出来并储存，比如低温。中间体的存在能够帮助解释部分化学反应如何进行。多数化学反应为多步反应，即反应不会一次完成。且活性中间体高能量，不稳定，容易再反应变成产物。有机化学中，活性常见的活性中间体有碳正离子、碳负离子、自由基和卡宾等。活性中间体通常难以分离，并且只能通过光谱手段观测。有些分步进行的合成路径涉及较稳定的中间体，例如格氏试剂的制备，碳负离子、醚和与镁离子形成络合物，稳定了碳负离子中间体。
活性中间体
网络释义专业释义
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active intermediate - 引用次数：2
The results presented in this paper may be very helpful for understanding the reactions of active intermediate and may provide some elemental theoretical basis for futher experiments on active intermediate reactions.
为了解上述有机活性中间体反应过程和机理提供了理论基础，进一步为实验研究提供了理论依据。
参考来源 - 亚烷基卡宾与环氧乙烷，环硫乙烷及甲醇反应的量子化学研究reactive intermediate； - 引用次数：1 参考来源 - AsAreactive intermediate (reactive complex)reactive intermediates
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双语例句原声例句
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活性中间体越稳定，其越容易形成，反应活性就越大。
The more stable an activated intermediate is, the easier the formation is, and the more active the reaction is.
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活性中间体和过渡状态性质的许多计算机也可能被实现。
Many calculations of the properties of reactive intermediates and transition states have also been performed.
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活性中间体和过渡状态性质的许多计算机也可能被实现。
Many calculations of the properties of reactive intermediates and transition states have been performed.
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And what it's used is to convert one type of group, what's called a carboxylic acid into another type of very reactive intermediate, which is called an acid chloride.
它被用来将一类被称作羧酸的化合物，转化成另外一类活性很高的反应中间体,也就是酰氯。
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But in terms of drugs that don't look like maybe this compound was used in the synthesis, many of them might have used thionyl chloride, because it generates such a nice reactive intermediate that you can go on and make a bunch of different compounds from that intermediate.
但是对于药物来说,它们可能跟合成过程中用到的这种化合物并不相像，很多药物的制造过程中都会用到亚硫酰氯，因为它能产生活性如此之高的反应中间体,以至于你可以继续利用反应中间体,来制造一堆不同类型的化合物。
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