Regarding natural rubber and its geometric isomer gutta-percha, which of the following statements ar — Polymers Chemistry Question
Question
Regarding natural rubber and its geometric isomer gutta-percha, which of the following statements are true?
Answer: A,B,D
💡 Solution & Explanation
Both are addition homopolymers of isoprene. Natural rubber is all-*cis*. Gutta-percha is all-*trans*, highly crystalline, and non-elastic (used in root canals). Since the repeating unit of polyisoprene is $[-CH_2-C(CH_3)=CH-CH_2-]$, cleavage of the double bond by ozone yields 4-oxopentanal ($CH_3-CO-CH_2-CH_2-CHO$).
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