2.18 Write IUPAC name of following compounds
a) (CH3)3 C Br b) CH2=CH-CI c) CsH5-CH21
Answers
Explanation:
Answer
Solution:-
(i)CH
3
−
CH
∣
CH
3
−
CH
∣
Cl
−CH
3
The IUPAC name of the above compound is 2-chloro-3-methylbutane.
Here 2-chloro is for the chloride group (−Cl) attached at position C−2 while 3-methyl is for the methyl group (−CH
3
) attached at the position C−3 and butane is for the long chain of 4 carbon atoms.
Hence the IUPAC name of the above compound is 2-chloro-3-methylbutane.
(ii)CH
3
−CH
2
−
CH
3
∣
C
∣
CH
3
−
CH
2
∣
I
The IUPAC name of the above compound is 1-iodo-2,2-dimethyl butane.
Here 1-iodo is for the iodide group (−I) attached at position C−1 while 2,2-dimethyl is for the 2 methyl groups (−CH
3
) attached at the same position C−3 and butane is for the long chain of 4 carbon atoms.
Hence the IUPAC name of the above compound is 1-iodo-2,2-dimethyl butane.
(iii)CH
3
−
CH
∣
CH
3
−
CH
∣
Br
−CH
3
The IUPAC name of the above compound is 2-bromo-3-methylbutane.
Here 2-bromo is for the bromide group (−Br) attached at position C−2 while 3-methyl is for the methyl group (−CH
3
) attached at the position C−3 and butane is for the long chain of 4 carbons.
Hence the IUPAC name of the above compound is 2-bromo-3-methylbutane.
(iv)CH
3
−
C
2
H
5
∣
C
∣
Cl
−CH
2
−CH
3
The IUPAC name of the above compound is 3-chloro-3-methylpentane.
Here 3-chloro is for the chloride group (−Cl) attached at position C−3 while 3-methyl is for the methyl group (−CH
3
) attached at the position C−3 and pentane is for the long chain of 5 carbon atoms.
Hence the IUPAC name of the above compound is 3-chloro-3-methyl pentane.
(v)CH
3
−CH=CH−
CH
3
∣
C
∣
Br
−CH
3
The IUPAC name of the above compound is 4-bromo-4-methylpent-2-ene.
Here 4-bromo is for the bromide group (−Br) attached at position C−4 while 4-methyl is for the methyl group (−CH
3
) attached at the position C−4 and pent-2-ene is for the long chain of 5 carbon atoms havinf double bond at position C−2.
Hence the IUPAC name of the above compound is 4-bromo-4-methylpent-2-ene.
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Answer:
The IUPAC names of various compounds are given below