Determine the I.U.P.A.C. name of the given co | vedclass

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(A) $1$. Identify the longest carbon chain containing the principal functional group $(-OH)$. The chain is a butane chain with the $-OH$ group at posi

Vedclass · Accepted Answer

$(2R, 3R)-3-$ Bromo$-2-$butanol

Vedclass · Answer

(A) $1$. Identify the longest carbon chain containing the principal functional group $(-OH)$. The chain is a butane chain with the $-OH$ group at position $2$ and the $-Br$ group at position $3$. The parent name is $3-$bromo$-2-$butanol.$2$. Assign priorities to the substituents at each chiral center using Cahn-Ingold-Prelog $(CIP)$ rules.$3$. At $C-2$: The priorities are $-OH (1) > -CH(Br)CH_3 (2) > -CH_3 (3) > -H (4)$. The $-H$ is on a dashed bond (pointing away). The sequence $1$ $\rightarrow 2$ $\rightarrow 3$ is clockwise,so the configuration is $2R$.$4$. At $C-3$: The priorities are $-Br (1) > -CH(OH)CH_3 (2) > -CH_3 (3) > -H (4)$. The $-H$ is on a wedged bond (pointing towards). The sequence $1$ $\rightarrow 2$ $\rightarrow 3$ is counter-clockwise,which would be $S$,but since $-H$ is pointing towards us,we reverse it to $R$. Thus,the configuration is $3R$.$5$. The complete name is $(2R, 3R)-3-$bromo$-2-$butanol.

Determine the $I.U.P.A.C.$ name of the given compound.

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