Past IIT JEE Questions - IIT JEE 2009 P1 Q2

1

rickde ·2009-04-12 05:55:57

isn't priority of OH > halide

UP 0 DOWN 0
Post on FacebookPost anonymously?

23

qwerty ·2009-12-25 04:16:53

i found the following priority for selecting functional grps thru net
1] Carbocations
2] Carboxylic acid
3] Acid anhydride
4] Esters
5] Acyl halides
6] Amides
7] Nitriles
8] aldehydes
9] Ketones
10] Alcohols
11] Thiols
12] Amines
13] Ether
14] Sulphides
15] Alkenes
16] Alkynes
17]alkanes
18] Alkyl halides
19] Nitro grp

so we can seenitrile grp > OH grp > Br grp , for selecting functional grp
pls tell if there is any correction in it

UP 0 DOWN 0
Post on FacebookPost anonymously?

9

Celestine preetham ·2009-04-17 03:44:16

i thought phenol is a characteristic group by itself and hence ans shuld be A

but many ppl say B :(

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

Optimus Prime ·2009-04-17 03:27:58

no c

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

rickde ·2009-04-17 03:23:23

here we do not consider priority
so B is correct

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

Aditya ·2009-04-16 10:56:19

No dear...

Priority grp is used for the parent chain name...

Otherwise only lowest set of locants is considered!

UP 0 DOWN 0
Post on FacebookPost anonymously?

1

Shreyan ·2009-04-16 10:43:16

why shudn't it be D? please help...im really confused on this...
our chem sir says it shud be D bcoz priority of OH > Br...and lowest set of locants will not be used since different functional groups are present. lowest set of locants is used only to choose numbering for similar groups..