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Derivce the sturcture of (i) 2-Chlorohexane (ii) Pent -4-en-2-ol (iii) 3-Nitrocyclohexene (iv) Cyclohex-2-en-1-ol (v) 6-Hydroxyheptanal |
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Answer» Solution :(i) 2-Chlorohexane : .hexane. indicates the PRESENCE of 6 carbon atoms in the chain. The functional group chloro is present at carbon 2. Hence, the structure of the compound is: `CH_(3)CH_(2)CH_(2)CH_(2)CH(Cl)CH_(3)` (ii) Pent -4-en-2-ol: .pent. indicates that parent hydrocarbon contains 5 carbon atoms in the chain. .en. and .ol. correspond to the functional groups C=C and `-OH` at carbon atoms 4 and 2 respectively. Thus, the structure is: `CH_(2) = CHCH_(2) CH (OH)CH_(3)` (iii) 3-Nitrocyclohexene : Six MEMBERED ring containing a carbon-carbon double bond is implied by cyclohexene, which is numbered as shown in (i). The prefix 3-nitro MEANS that a nitro group is present on C-3. Thus, complete structural formula of the compound is (ii). Double bond is suffixed functional group whereas `NO_(2)`is prefixed functional group therefore double bond GETS perference over `-NO_(2)` group:  (iv) Cyclohex-2-en-1-ol: .1-ol. means that a `-OH` group is present at `C-1` Oh is suffixed functional group and gets perference over C=C bond. Thus the structure is as shown in (II).  (v) 6-Hydroxyheptanal: .heptanal. indicates the compound to be an aldehyde containing 7 carbon atoms in the parent chain. The .6-hydroxy. indicates that -H group is present at carbon 6. Thus, the structural formula of the compound is: `CH_(3)CH (OH)CH_(2)CH_(2)CH_(2)CH_(2)CHO` carbon atom of -`CHO` group is included while numbering the carbon chain |
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