CH1012
L1 /
‹#›
L1 /
5
N + 1 RULE
Proton Coupled Spectrum
- CH3CHCl2
2 types of
equivalent hydrogens ® 2 signals
db 5.9, quartet, CH
da 2.0, doublet, CH3
(n + 1) Rule
An H (or equivalent Hs)
that has n equivalent
Hs on adjacent
carbon(s) will give an
NMR signal that is
split into a multiplet
with n+1 peaks
that has n equivalent
Hs on adjacent
carbon(s) will give an
NMR signal that is
split into a multiplet
with n+1 peaks
on
adjacent C
n=3,
n+1= 4
on
adjacent C
n=1,
n+1= 2
