L1 /
3
CH1012
EQUIVALENT H ATOMS
• We do
not get coupling between the Hs in a group of equivalent
Hs.
• Equivalent hydrogens are those which by symmetry
or internal rotations occupy on average
the same chemical environment.
• In the following
molecule there are 2 groups
of equivalent hydrogens. Each group is
separated from by > 3 bonds from the other
group and so we do not get coupling
- we get two singlets (single peaks).
of equivalent hydrogens. Each group is
separated from by > 3 bonds from the other
group and so we do not get coupling
- we get two singlets (single peaks).
1-chloro-2-methylpropene 3-chloro-2-methylpropene
