Illustrated Glossary of Organic Chemistry
Wavenumber (cm
-1
):
The number of wavelengths per unit of distance. A unit of
photon
energy in
infrared spectroscopy
.
Infrared spectrum
of 2-
butan
one
. The
x
-axis correlates to
photon
energy, whose unit is cm
-1
.
Related terms:
Wavelength
,
λ
,
stretching frequency
,
mass spectrometry
,
m/z
,
NMR spectroscopy
,
chemical shift
,
ppm
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