In the step-growth synthesis of the polyester Dacron, ethylene glycol is used as the bifunctional di — Polymers Chemistry Question
Question
In the step-growth synthesis of the polyester Dacron, ethylene glycol is used as the bifunctional diol monomer. What is the total number of covalent bonds (sigma + pi) present in a single unreacted molecule of ethylene glycol ($HO-CH_2-CH_2-OH$)?
Answer: 9
💡 Solution & Explanation
The structure of ethylene glycol is $HO-CH_2-CH_2-OH$. The bonds are: one $C-C$ bond, two $C-O$ bonds, four $C-H$ bonds, and two $O-H$ bonds. All are sigma bonds. Total = $1 + 2 + 4 + 2 = 9$ covalent bonds.
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