Number of sigma (sigma) and pi (pi) bonds in | vedclass

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(D) Aspirin is acetylsalicylic acid with the chemical formula $C_9H_8O_4$.Its structure consists of a benzene ring,a carboxylic acid group $(-COOH)$,a

Vedclass · Accepted Answer

$21$ and $5$

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(D) Aspirin is acetylsalicylic acid with the chemical formula $C_9H_8O_4$.Its structure consists of a benzene ring,a carboxylic acid group $(-COOH)$,and an ester group $(-OCOCH_3)$.Counting the bonds:$1$. The benzene ring has $6$ $C-C$ $\sigma$ bonds,$3$ $C-C$ $\pi$ bonds,and $4$ $C-H$ $\sigma$ bonds.$2$. The carboxylic acid group has $1$ $C-C$ $\sigma$ bond,$1$ $C=O$ $\sigma$ bond,$1$ $C=O$ $\pi$ bond,$1$ $C-O$ $\sigma$ bond,and $1$ $O-H$ $\sigma$ bond.$3$. The ester group has $1$ $C-O$ $\sigma$ bond,$1$ $C=O$ $\sigma$ bond,$1$ $C=O$ $\pi$ bond,$1$ $C-C$ $\sigma$ bond,and $3$ $C-H$ $\sigma$ bonds.Total $\sigma$ bonds = $6 (ring) + 4 (C-H) + 1 (C-C) + 1 (C=O) + 1 (C-O) + 1 (O-H) + 1 (C-O) + 1 (C=O) + 1 (C-C) + 3 (C-H) = 21$.Total $\pi$ bonds = $3 (ring) + 1 (C=O) + 1 (C=O) = 5$.Therefore,the number of $\sigma$ and $\pi$ bonds are $21$ and $5$ respectively.

Number of $\sigma$ (sigma) and $\pi$ (pi) bonds in aspirin are respectively . . . . . . .

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