Method of polymerizing alpha-omega diynes

Details Method of polymerizing alpha-omega diynes Method of polymerizing alpha-omega diynes

C - Chemistry, Metallurgy

07

C

260/653.1, 260/6

C07C 13/44 (2006.01) C07C 2/48 (2006.01) C07C 23/32 (2006.01) C07F 7/08 (2006.01)

Patent

CA 2000806

ABSTRACT OF THE INVENTION A method of cyclization of .alpha.,.omega.-diynes with a transition metal catalyst such as niobium or tantalum salts such as halogen to yield products such as dimers, trimers and higher polymers which may have benzocyclobutene groups, or none of these, depending on the size of n in the .alpha.,.omega.-diynes of the formula HC?C(CH2)nC?C-H.

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