Which of the following pairs are metamers?

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Question

(C) Metamerism is a type of structural isomerism that arises due to the different distribution of carbon atoms on either side of a polyvalent function

Vedclass · Accepted Answer

Phenyl cyclohexanoate & Cyclohexyl benzoate

Vedclass · Answer

(C) Metamerism is a type of structural isomerism that arises due to the different distribution of carbon atoms on either side of a polyvalent functional group (such as $-O-$,$-S-$,$-NH-$,$-CO-$,etc.).In option $C$,the functional group is the ester group $(-COO-)$. In the first molecule,the phenyl group is attached to the carbonyl carbon,and the cyclohexyl group is attached to the oxygen atom (Phenyl benzoate).In the second molecule,the cyclohexyl group is attached to the carbonyl carbon,and the phenyl group is attached to the oxygen atom (Cyclohexyl benzoate).Since the distribution of alkyl/aryl groups around the polyvalent ester functional group is different,these are metamers.

Column $I$ (Compounds)	Column $II$ (Relation)
$(i)$ $CH_3-CH_2-C(CH_3)_2-Cl$ and $(CH_3)_3C-Cl$	$(P)$ Homologues
$(ii)$ $C_6H_5-O-CH_2-CH_3$ and $C_6H_5-O(CH_3)-CH_3$ (ortho-methylanisole)	$(Q)$ Functional group isomers
$(iii)$ $C_6H_5-O-CH_3$ and $2-methylphenol$	$(R)$ Metamers
$(iv)$ $CH_3-CH(CH_3)-CH_2-OH$ and $(CH_3)_3C-OH$	$(S)$ Position isomers

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