A chemist checks proposed repeating units for polymers P and Q.
| Polymer | Monomer | Other product formed | Proposed repeating unit |
|---|---|---|---|
| P | CH2=C(CH3)2\text{CH}_2{=}\text{C}(\text{CH}_3)_2CH2=C(CH3)2 | None | [-CH2-C(CH3)2-]n\left[\text{-CH}_2\text{-C}(\text{CH}_3)_2\text{-}\right]_n[-CH2-C(CH3)2-]n |
| Q | H2N-CH(CH3)-COOH\text{H}_2\text{N-CH}(\text{CH}_3)\text{-COOH}H2N-CH(CH3)-COOH | Water | [-NH2-CH(CH3)-COOH-]n\left[\text{-NH}_2\text{-CH}(\text{CH}_3)\text{-COOH-}\right]_n[-NH2-CH(CH3)-COOH-]n |
Explain whether each proposed repeating unit is correct. Give a corrected repeating unit for any proposal that is incorrect.