Solution Found!
All of the following names are incorrect or incomplete. In
Chapter 4, Problem 5P(choose chapter or problem)
Problem 5P
All of the following names are incorrect or incomplete. In each case, draw the structure (or a possible structure) and name it correctly.
(a) 2-methylethylpentane
(b) 2-ethyl-3-methylpentane
(c) 3-dimethylhexane
(d) 4-isobutylheptane
(e) 2-bromo-3-ethylbutane
(f) 2-diethyl-3-methylhexane
Questions & Answers
QUESTION:
Problem 5P
All of the following names are incorrect or incomplete. In each case, draw the structure (or a possible structure) and name it correctly.
(a) 2-methylethylpentane
(b) 2-ethyl-3-methylpentane
(c) 3-dimethylhexane
(d) 4-isobutylheptane
(e) 2-bromo-3-ethylbutane
(f) 2-diethyl-3-methylhexane
ANSWER:
Answers:
(a) 2-methylethyl pentane
The name of the compound given is 2-methylethyl pentane.
The given name is incorrect as the substituent (-CH3,-C2H5) on the main carbon atom should be named according to alphabetical order that is it should be ethyl methyl pentane .
Also the location of one of the substituent on the main carbon atoms is not mentioned .
As both the methyl and ethyl groups (-CH3,-C2H5)are bonded to second carbon atom ,the correct name will be 2,2-ethyl methyl pentane .
(b) 2-ethyl-3-methylpentane
The name of the compound given is 2-ethyl-3-methylpentane .
The given name is incorrect because according to IUPAC rules we have to select the longest chain so the longest chain according this is shown in the figure .so the longest chain is hexane molecule
(c) 3-dimethylhexane
The name of the com