Illustrated Glossary of Organic Chemistry
Pi
bond
(π
bond
):
A
bond
formed by the overlap of
p
orbitals
on adjacent atoms, perpendicular to any
sigma bond(s)
between the same atoms. Indicated in a
Kekule structure
or
bond-line structure
as an extra line parallel to the line which represents the
sigma bond
. A pi
bond
has two
orbital lobes
, one above and one below the plane of the
sigma bond
.
Pi
Bond
of
Ethylene
Kekule structure
Molecular model kit
Related terms:
Pi electron
,
pi antibonding molecular orbital
,
π* molecular orbital
,
σ bond
,
atomic orbital
,
s
orbital
,
molecular orbital
,
hybrid orbital
,
sp
3
,
sp
2
,
sp
Wikipedia entry
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