环辛二烯(有时简称COD)是任何一种化学式为 (CH2)4(C2H2)2的环二烯。 如果不考虑对映异构体,环辛二烯有四种异构体: 1,2-环辛二烯,是一种累积二烯烃、1,3-环辛二烯、1,4-环辛二烯和1,5-环辛二烯。常见的环辛二烯异构体有共轭异构体1,3-环辛二烯和1,5-环辛二烯,它们可以用作过渡金属的配体。 它们都是无色挥发性液体。[1]
![Thumb](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/1%2C5-Cyclooctadiene.svg/140px-1%2C5-Cyclooctadiene.svg.png)
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