Question

Arrange priority of $CIP$ sequence of given groups in decreasing order-
(I) $OH$
(II) $COOH$
(III) $CHOHCH_{3}$
(IV) $CH_{2}OH$

• A. $I>II>III>IV$
• B. $IV>III>II>I$
• C. $II>III>IV>I$
• D. $IV>I>II>III$

Answer 1

Answer: (A)

According to Cahn-Ingold-Prelong $\left(C I P\right)$ sequence, priority order of groups is decided by atomic number or atomic mass of Electronegativity of connecting atom $\left(o > c\right)$ conjugative atoms.
$-OH>-COOH>-CH\left(O H\right)CH_{3}>-CH_{2}OH$