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Explain why the given names in the following are wrong Give a correct name in each case: (a) 1-methylpentane (b) 2-ethylbutane (c) 2,3-dichloropropane (d) 1,1,,3-trimethylpropane (e) 3-bromo-2-methylpropane (f) i-chloro-1-methylpropan-2-ol (g) 3-propyl-4-methylbutan-1-oic acid (h) 4,4-dimethylbut-2-en-1ol (i) 1,1,2,2-tetramethylethane (j) 1,4-dihydroxybut -2-yne (k)2-keto-pentan-5-oic acid (l) 1-aminobutan-3-one. |
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Answer» (b) The longest cahin consists of five carbon atoms. The correct name is 3-methylpentane. (c) The NUMBERING has been DONE wrongly. The correct name is 1,2-dichloroprogane. (d) The length chain consists of five carbon atoms. the correct name is 2-methylpentane. (e) The numbering has been done wrongly the correct name is 1-bromo-2-methylpropane. (f) The longest chain has not been selected properly the correct name is 3-chlorobutan-2-ol. (G) The longest chain consists of 6-carbon atoms. the correct name is 3-ethylhexanoic acid (h) The longest chain consits of five carbon atoms. the correct name is 4-methylpent-2-en-1-ol (j) The longest chain consists of four carbon atoms. the correct name is 2,3-dimethylbutane. (j) -OH is a primary FUNCTIONAL group and not substituated. the c orrect name is but -2-yne-1,4-diol. (k) Carboxylic group is a principal functional group and numbering should be done from this end. the correct name of the compound is 4-0ketopentanoic acid. (l) Keto is a principal functional group and lowestnumber should be given to it. the correct name of the compound is 4-aminobutan-2-one. |
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