Chapter 11 - Polycarbocyclic Bridged Ring Compounds

Abstract

Publisher Summary This chapter reviews significant advances in the synthesis and chemistry of polycarbocyclic bridged ring compounds. This class of compounds frequently possesses rigid structures whose carbocyclic frameworks contain varying degrees of steric strain and in recent years, highly region- and stereo selective methods have been developed for synthesizing structurally complex bridged ring systems of known molecular geometry. Ring-opening olefin metathesis polymerization (ROMP) occurs when α, β, α- trisubstituted bis (η 5 -cyclopentadienyl) derived from strained polycyclic bridged alkenes, such as norbornene, is cleaved thermally in the presence of excess strained alkene. The chapter discusses the general method of synthesis of simple monocyclic and nonbridged polycyclic compounds. A review of the strained polycarbocyclic alkenes is then presented. The chapter also investigates propallanes and the tricycle [3 .3 .1. 1 3,7 ] decane (adamantine) group for its mechanism and structure.