Question

sir plz explain metamerism clearly with example

Answer 1

HI FRIEND!Compounds having the same molecular formula but different number of carbon atoms ( alkyl groups) on either side of functional group ( i.e., -O-,-S-, -NH-, -C(=O)-) are called metamers and the phenomenon is called metamerism. metamerism occurs amongst the members of the same homologus family.For example,
CH3CH2-O-CH2CH3 is metamer of CH3-O-CH2CH2CH3 OR CH3-O-CH(CH3)2
CH3CH2COCH2CH3 is metamer of CH3COCH2CH2CH3 OR CH3COCH(CH3)2
It may be noted that metamers may also be position isomers, e.g., pentan-2-one and pnetan-3-one may be regarded as position isomers as well as metamers.
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Answer 2

Answer:

Different compounds with the same molecular formula and the same functional having unequal distribution of carbon atoms on either side of the functional group is called metamerism and the isomers are known as metamers. For example, Ethoxyethane

(CH_3 - CH_2-O-CH_2 CH_3) and methoxypropane (CH_3-O-CH_2 - CH_2 - CH_2) have the same molecular formula C_4 H_10O and the same functional group ether but have different distribution of carbon atoms attached to etheral oxygen. These are metamers of each other.