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(i) What is metamerism ? Give the structure and IUPAC name of metamers of 2-methoxy propane (ii) Explain the following reactions. 1. CH_(3)-CH_(2)OH overset("acidified")underset(Na_(2)Cr_(2)O_(7))to ? 2. CH_(3)-underset(OH)underset(|)(CH)-CH_(3) underset(Na_(2)Cr_(2)O_(7))overset("acidified")to ? 3. CH_(3)-CH_(2)-CH_(2)OH overset("PCC")to ? |
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Answer» Solution :Metamerism: It is a special type of isomerism in which molecules with same formula, same functional group, but different only in the nature of the alkyl group attached to oxygen. 1. `CH_(3)-OVERSET(CH_(3))overset(|)(O)-CH-CH_(3)""-=2-"methoxy propane"` 2. `CH_(3)-CH_(2)-O-CH_(2)-CH_(3)""-="Ethoxy ethane"` 3. `CH_(3)-O-CH_(2)-CH_(2)-CH_(3)""-=1-"methoxy propane"` Ethoxy ethane and 1 -methoxy propane are metamers of 2-methoxy propane. (ii) 1. `CH_(3)-underset("ethanol")(CH_(2)-OH)overset("acidified "Na_(2)Cr_(2)O_(7))underset((O))to underset("ethanal")(CH_(3)-CHO)overset("acidified "Na_(2)Cr_(2)O_(7))underset((O))to underset("ethanoicacid")(CH_(3)-COOH)` 2. `underset("Propan-2-ol")(CH_(3)-underset(H)underset(|)(CH)-CH_(3))overset("acidified "Na_(2)Cr_(2)O_(7))underset((O))to underset("Propanal")(CH_(3)-underset(O)underset(||)(C)-CH_(3))overset("acidified "Na_(2)Cr_(2)O_(7))underset((O))to underset("ETHANOIC acid")(CH_(3)-underset(O)underset(||)(C)-OH)` 3. `underset("Propan-1-ol")(CH_(3)-CH_(2)-CH_(2))-OH overset("PCC")tounderset("Propanal")(CH_(3)-CH_(2))-CHO` |
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