Norbornenes with a COOR substituent

Monomers in this category fall into three groups (i) those with small substituents, giving polymers, which may be thermoplastic (Ueshima 1974) (ii) those with substituents of intermediate size and of such a character that the polymers can have liquid-crystalline or other interesting properties and (iii) macromonomers in which a polymer is terminated by a norbomenyl group and which can be used to make graft copolymers by ROMP. Except where stated the monomers are endolexo mixtures. 

With 48 and 49 not only has the spacer length n been varied but a series of polymers of narrow MWD = 1.05-1.28, DP = 5-100) has been prepared in 

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Table 16 ROMP of norbornenes with a COOR substituent in 2-position. 

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