Question
The ____, in UV spectrum, tells us the extent of conjugation within conjugated systems.
Answer
The wavelength of maximum absorbance, in UV spectrum, tells us the extent of conjugation within conjugated systems.
In Summary: UV and visible spectroscopy can be used to detect electronic excitations in
conjugated molecules. With an increasing number of molecular orbitals, there is an increasing
variety of possible transitions and hence number of absorption bands. The band of longest
wavelength is typically associated with the movement of an electron from the highest occupied
to the lowest unoccupied molecular orbital. Its energy decreases with increasing conjugation.
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Infrared (IR) spectroscopy measures ____.
Molecular vibrations can be seen as ____.
To record an IR spectrum, i____e is measured.
The infrared light range runs from λ = ____.
The useful absorptions for infrared spectroscopy occur at wavelengths of ____ nm.
On an IR spectrum, we use an analog of ____ called wavenumber.