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Vinyl/trans/ cis. vinyl-(1,2) The third and fourth carbon atoms are pendant; the first and second carbon atoms
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Vinyl/trans/cis vinyl-(1,2) The third and fourth carbon atoms are pendant; the first and second carbon atoms participate in the polymer backbone. trans-(1,4) The hydrogen atoms attached to the carbon–carbon double bond on the polymer backbone are on opposite sides. cis-(1,4) The two hydrogen atoms attached to the carbon–carbon double bond in the polymer are on the same side of the double bond.