disrotatory

In a disrotatory mode of an electrocyclic reaction (a class of organic chemical reactions) the substituents located at the termini of a conjugated double bond system move in the opposite (clockwise or counter clockwise) direction during ring opening or ring closure. example: trans-cis-trans-2,4,6-octatriene converts exclusively to cis-dimethylcyclohexadiene. opposite to conrotatory

References

Carey, Francis A.; Sundberg, Richard J.; (1984). Advanced Organic Chemistry Part A Structure and Mechanisms (2nd ed.). New York N.Y.: Plenum Press. ISBN 0-306-41198-9.

* March jerry; (1885). Advanced Organic Chemistry reactions, mechanisms and structure (3rd ed.). New York: John Wiley & Sons, inc. ISBN 0-471-85472-7

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