Compounds that contain two fixed double bonds (usually assumed to be between carbon
atoms). Dienes in which the two double-bond units are linked by one single bond are
termed conjugated, e.g.
CH2=CH–CH=CH2
buta-1,3-diene. Dienes in which the double bonds are adjacent are called cumulative,
e.g.
CH3–CH=C=CH2
buta-1,2-diene. Those in which one or more of the unsaturated carbon atoms is replaced
by a heteroatom may be called heterodienes.
Source:
PAC, 1995, 67, 1307
(Glossary of class names of organic compounds and reactivity intermediates based on
structure (IUPAC Recommendations 1995))
on page 1332
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
https://doi.org/10.1351/goldbook.
