Synthesis of Carbynoid Materials by Chemical Dehydrohalogenation of Halogen-Containing Polymers - Polyynes: Synthesis, Properties, and Applications - page 259

Similarly, poly(trichlorobutadiene)s contain 3,4-connected links, along
with predominating 1,4-links [37], that will afford allenic or acetylenic
pendants during dehydrohalogenation (Scheme 12.10).
SCHEME 12.10
Moreover, poly(trichlorobutadiene)s are known to undergo allylic
rearrangements with migration of allylic chlorine (1-4%) and hydrogen
(3-10%) atoms under the action of solvents [38]. This accounts for remark-
able similarity of the IR spectra of dehydrochlorinated poly(1,1,2-trichloro-
butadiene) and poly(1,2,3-trichlorobutadiene) ( Figure 12.1 ) .
SCHEME 12.11