KCET 2016 Chemistry Solved Paper

The IUPAC name of the given compounds,

4

C

H3−

3

C

H=

2

C

H−

1

C

H2−Br is 1-bromobut-2-ene. If the numbering of the carbon atoms starts from bromide attached carbon,that is

1

C

H3−

2

C

H=

3

C

H−

4

C

H2−Br, the numbering will be incorrect order of numbering because, functional groups are not getting least number.