Question
Answer the following questions.
a-amino acids have relatively higher melting points than the corresponding halo acids. Explain.
a-amino acids have relatively higher melting points than the corresponding halo acids. Explain.
✓
Answer
$\alpha-\text{Amino}$ acids act as zwitter ions, (H3N+-CHR-COO- ) or dipolar ions. Due to this dipolar salt-like structure, they have strong dipole-dipole interactions. Therefore, their melting points are higher than the corresponding halo acids which do not exist as zwitter ions.
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