Question

Write IUPAC names of the following: (i) CH\(_3\)CH = CH-CH\(_3\) Br
(ii) (CH\(_3\))\(_3\)-C-CH\(_2\)(Br)
(iii) CH\(_3\)CH\(_2\)-C-CH(Cl)CH\(_2\)CH\(_3\)
(iv) (CH\(_3\))\(_2\)CBrCH\(_2\)CH\(_3\)
(v) (CH\(_3\))\(_3\)Cl

Hint:

In IUPAC naming, the longest carbon chain is identified first, and the position of substituents is specified by the lowest possible numbers.

Answer 1

(i) CH\(_3\)CH = CH-CH\(_3\) Br:
This compound is a bromine-substituted alkene. The IUPAC name is 1-bromo-2-butene.
(ii) (CH\(_3\))\(_3\)-C-CH\(_2\)(Br):
This is a bromoalkane. The IUPAC name is 2-bromo-3-methylbutane.
(iii) CH\(_3\)CH\(_2\)-C-CH(Cl)CH\(_2\)CH\(_3\):
This compound is a chloroalkane with a substituent on the second carbon. The IUPAC name is 2-chloro-3-methylpentane.
(iv) (CH\(_3\))\(_2\)CBrCH\(_2\)CH\(_3\):
This is a bromoalkane. The IUPAC name is 3-bromo-2-methylbutane.
(v) (CH\(_3\))\(_3\)Cl:
This is a simple chloroalkane. The IUPAC name is tert-butyl chloride.