Conjugated Systems c-c-☒ conjugated double bonds penta-1,3-diene (more stable than isolated double bonds) H、 H、 H >c=C< >c=c< CH, CH2 isolated double bonds penta-1,4-diene Conjugated double bonds are separated by one single bond. Isolated double bonds are separated by two or more single bonds Conjugated double bonds are more stable than isolated ones. 2013 Pearson Education,Inc. Chapter 15 © 2013 Pearson Education, Inc. Chapter 15 2 Conjugated Systems • Conjugated double bonds are separated by one single bond. • Isolated double bonds are separated by two or more single bonds. • Conjugated double bonds are more stable than isolated ones