Illustrated Glossary of Organic Chemistry
Anti:
Atoms,
groups
, or other portions of a
molecule
that point in opposite directions. These entities have a
dihedral angle
of more than 90
o
.
The two
methyl groups
are anti and
staggered
in the
anti-periplanar
conformation
of
butane
.
Verify the
CH
3
/
CH
3
dihedral angle
of 180
o
with a
molecular model
.
The
electrophilic addition
of Br
2
to an
alkene
is an
anti addition
.
Related terms:
Gauche
,
eclipsed
,
cis
,
trans
,
E
,
Z
,
syn addition
,
Newman projection
,
syn-periplanar
,
anti-Markovnikov addition
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