1. Tardigrade
  2. Question
  3. Chemistry
  4. Assertion: cis-3-chloroprop-2-enoic acid is less stable than its trans-form. Reason: Dipole moment of ds-form is greater than trans-form.

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Q. Assertion: cis-3-chloroprop-2-enoic acid is less stable than its trans-form.
Reason: Dipole moment of ds-form is greater than trans-form.

AIIMSAIIMS 2013Aldehydes Ketones and Carboxylic Acids

Solution:

Assertion is true because usually, for acrylic systems trans-isomers are more stable than cis- isomers. This is due to increased unfavourable steric interaction of the substituents in cis-isomer. Reason is also true because generally the dipole moment of trans-form is zero (or less) depending whether the substituents on both sides of double bond are same or not while cis-forms are polar in nature with certain value of dipole moment.