AbstractThe capability of chloroalkenes to undergo cometathesis with alkenes was investigated with the intention to check the possibility of applying the principle of the synthesis of α,omega;‐difunctional polybutadienes to α,omega;‐dichloropolybutadienes. The results obtained from the analysis of the reaction products resulting from 1,6‐dichloro‐3‐hexene (1)/4‐octene (2) systems and WCl6/EtAlCl2were compared with those obtained from 1‐chloro‐3‐hexene (8) alone,1/1,5‐cyclooctadiène (13), 5‐chloro‐1‐pentene (6)/2, and 1,4‐dichloro‐2‐butene (10)/2systems in the presence of WCl6/EtAlCl2. It was found that it is possible to apply the synthetic principle to α,omega;