Draw all stereoisomers of 3-chloro-2,4,-heptadiene

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It is the DOUBLE BONDS that allow for isomerism here.
You might think there is R/S isomerism around Carbon 3, since there's where the chloro groups is, but because there is a double bond there it is not a chiral centre.
Therefore, there are only 4 stereoisomers: cis/cis, cis/trans, trans/cis, and trans/trans. This is equivalent to Z/Z, Z/E, E/Z, E/E if you know how to name organic compounds that way.

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*mistake at 4:50

If they are on the same ("zame") side they are in the Z configuration.

bencheveryday
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4:23 noooo that's E! Still a very helpful video though

Ragnarly