Factors affecting J value
1. Bond distance
2. Bond angle
How many types of coupling constant
1.1j CH
2. 2j GEMINAL
3. 3 j VICINAL
4. 4 J W
J values
O to 2 hz
2 to 4
6 to 8
8 to 12
12 t 16
16 to 18 hz
4j
2j sp2 carbon diastereotopic
3j vicinal on single bond ,cis ,Trans
2j geminal sp3
5H , multiplet
Monosubstituted benzene ring
Broad signal give by
Amine group
0 to 3 hz ke beech me kiss Tarah ke protons ke peaks dikae hai
Sp3 carbon se Jude EŴ group