The diMe-DCPD and Me-DCPD isomers of very low concentration contained
in a commercial mixture were determined based on the C-13 NMR and GC-M
S results and by employing correlations between Kovats' and Branching
indices. This identification allowed us to propose some statistical ru
les to determine the potential content of the monomers in different mi
xtures by comparing with experimental results obtained by thermal crac
king.