CH1012
L1 /
‹#›
L1 /
8
COUPLING
1H
1H or proton NMR signals
are often complex signals
are often complex signals
13C
• 13C NMR signals are
observed as sharp
singlets under normal operating conditions.
(coupling to bonded
H spins is removed)
observed as sharp
singlets under normal operating conditions.
(coupling to bonded
H spins is removed)
Natural abundance 13C
of 1.1% means a very
low prob. of adjacent 13C-13C \ no coupling.
of 1.1% means a very
low prob. of adjacent 13C-13C \ no coupling.
We use proton
decoupling to remove J 1H13C
• Coupling of
adjacent
H spins gives these
complex patterns.
H spins gives these
complex patterns.
