(D) The $IUPAC$ names and bond counts for the given structures are as follows: $(i)$ $CH_3-CH(CH_3)-CH=CH-CH_2-CH=C(CH_3)-CH_2-CH_3$ $2,7-\text

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(D) The $IUPAC$ names and bond counts for the given structures are as follows: $(i)$ $CH_3-CH(CH_3)-CH=CH-CH_2-CH=C(CH_3)-CH_2-CH_3$ $2,7-\text{Dimethylnona}-3,6-\text{diene}$,$30 \sigma, 2 \pi$ $(ii)$ $CH_3-CH=CH-CH_2-CH=CH-CH(C_2H_5)-CH_2-CH_3$ $5-\text{Ethyldeca}-2,6-\text{diene}$,$33 \sigma, 2 \pi$ $(iii)$ $CH_2=C(CH_2-CH_2-CH_3)_2$ $2-\text{Propylpent}-1-\text{ene}$,$26 \sigma, 1 \pi$ $(iv)$ $CH_3-CH(C_4H_9)-CH=C(C_2H_5)-CH_2-CH(CH_3)_2$ $4-\text{Ethyl}-2,6-\text{dimethyldec}-4-\text{ene}$,$41 \sigma, 1 \pi$

Class 11 Chemistry 8-1.Organic Chemistry : Classification and Nomenclature of Organic compounds Nomenclature of organic compounds

Medium

Write $IUPAC$ names and calculate the number of $\sigma$ and $\pi$ bonds for the following compounds:
$(i)$ $CH_3-CH(CH_3)-CH=CH-CH_2-CH=C(CH_3)-CH_2-CH_3$
$(ii)$ $CH_3-CH=CH-CH_2-CH=CH-CH(C_2H_5)-CH_2-CH_3$
$(iii)$ $CH_2=C(CH_2-CH_2-CH_3)_2$
$(iv)$ $CH_3-CH(C_4H_9)-CH=C(C_2H_5)-CH_2-CH(CH_3)_2$

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Solution

(D) The $IUPAC$ names and bond counts for the given structures are as follows:

$(i)$ $CH_3-CH(CH_3)-CH=CH-CH_2-CH=C(CH_3)-CH_2-CH_3$	$2,7-\text{Dimethylnona}-3,6-\text{diene}$,$30 \sigma, 2 \pi$
$(ii)$ $CH_3-CH=CH-CH_2-CH=CH-CH(C_2H_5)-CH_2-CH_3$	$5-\text{Ethyldeca}-2,6-\text{diene}$,$33 \sigma, 2 \pi$
$(iii)$ $CH_2=C(CH_2-CH_2-CH_3)_2$	$2-\text{Propylpent}-1-\text{ene}$,$26 \sigma, 1 \pi$
$(iv)$ $CH_3-CH(C_4H_9)-CH=C(C_2H_5)-CH_2-CH(CH_3)_2$	$4-\text{Ethyl}-2,6-\text{dimethyldec}-4-\text{ene}$,$41 \sigma, 1 \pi$