PolymershardNUMERICAL

In the synthesis of the biodegradable polymer PHBV, both monomers exhibit stereoisomerism. How many Polymers Chemistry Question

Question

In the synthesis of the biodegradable polymer PHBV, both monomers exhibit stereoisomerism. How many chiral carbon atoms are present in a system containing exactly one molecule of unreacted 3-hydroxybutanoic acid and one molecule of unreacted 3-hydroxypentanoic acid?

Answer: 2

💡 Solution & Explanation

3-hydroxybutanoic acid is $CH_3-C^*H(OH)-CH_2-COOH$; the C3 carbon is chiral (1 chiral center). 3-hydroxypentanoic acid is $CH_3-CH_2-C^*H(OH)-CH_2-COOH$; the C3 carbon is also chiral (1 chiral center). Total chiral centers = $1 + 1 = 2$.

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