The number of sigma and pi bonds in propane-1 | vedclass

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(B) The structure of propane$-1, 2, 3-$tricarboxylic acid is $HOOC-CH_2-CH(COOH)-CH_2-COOH$.Counting the bonds:$1$. There are $3$ carboxylic acid grou

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$19\sigma, 3\pi$

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(B) The structure of propane$-1, 2, 3-$tricarboxylic acid is $HOOC-CH_2-CH(COOH)-CH_2-COOH$.Counting the bonds:$1$. There are $3$ carboxylic acid groups $(-COOH)$,each containing one $C=O$ double bond. Thus,there are $3\pi$ bonds.$2$. Counting the $\sigma$ bonds:- $C-C$ bonds: $2$ (in the backbone) $+ 3$ (to carboxyl groups) $= 5 \sigma$ bonds.- $C-H$ bonds: $2$ (on $C_1$) $+ 1$ (on $C_2$) $+ 2$ (on $C_3$) $= 5 \sigma$ bonds.- $C=O$ bonds: $3 \sigma$ bonds.- $C-O$ bonds: $3 \sigma$ bonds.- $O-H$ bonds: $3 \sigma$ bonds.Total $\sigma$ bonds $= 5 + 5 + 3 + 3 + 3 = 19$.Therefore,the molecule has $19\sigma$ and $3\pi$ bonds.

The number of $\sigma$ and $\pi$ bonds in propane$-1, 2, 3-$tricarboxylic acid is:

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