Diiodobutadiyne (1,4-diiodobuta-1,3-diyne) is an organoiodine compound with the chemical formula C4I2. Its structure is I\sC\tC\sC\tC\sI. It is a white solid. It is used in the creation of the polymer poly(diiododiacetylene) (PIDA) by undergoing 1,4 polymerization.
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