double-bond isomerism

double-bond isomerism

[¦dəb·əl ¦bänd ī′säm·ə‚riz·əm]
(physical chemistry)
Isomerism in which two or more substances possess the same elementary composition but differ in having double bonds in different positions.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.