Illustrated Glossary of Organic Chemistry
1,2-shift:
The migration of an atom or
group
from one atom to the adjacent atom.
In this generic 1,2-shift atom X migrates from atom Y to atom Z.
In this
carbocation rearrangement
, a
1,2-H shift
converts a
1
o
carbocation
into a
3
o
carbocation
.
A
1,3-H shift
is generally forbidden. This
mechanism step
requires a
proton shuttle
.
Related terms:
1,3-shift
,
sigmatropic reaction
,
proton bus
,
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