Cyclohexenes ring-opening metathesis polymerization

The only exception is cyclohexene which, for thermodynamic reasons, does not participate in ring-opening metathesis polymerization. 

The partial hydrogenation of multiple bonds includes chemical reactions of industrial interest for example, the partial hydrogenation of benzene to cyclohexene used to synthesize several compounds, from which the main is nylon production, the partial hydrogenation of 1,5-cyclooctadiene (COD) to cyclooctene (COE), which is an important industrial intermediate product for manufacturing special polymers such as poly-octenamers via ring-opening metathesis polymerization, which is used as a modifier in mbbers and thermoplastics (Sato, Aoki, Noyori, 1998 Rylander, 1985 Schmidt Schomacker, 2007). 

Metathesis of acyclic olefins is thermoneutral, i.e., the enthalpy of the reaction is approximately equal to zero because double bonds are broken and reformed in the reaction. Therefore, alkene metathesis leads to an equilibrium which is determined by the entropy of the reaction. Metathesis of cyclic olefins proceeds differently it leads to the polymerization of cyclic olefins owing to ring opening (however, such polymerization does not occur for cyclohexene) see equation (13.163). Although the number and type... 

Most cyclic alkenes (cyclohexene being the notable exception because of its stability) undergo metathesis, but instead of dimerizing to form cyclodienes (equation 11.19), they usually polymerize instead to form polyalkenamers (path c, Scheme 11.1). Because this kind of metathesis involves rupturing the C=C and opening up the ring, the process is called ROMP. 

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