2.6 UV/Vis Spectroscopy
53
a longest wavelength absorption maximum
400
500
600
700 nm
300
200
R I
O
R
Cl
R NO
n = 0 – 4
n = 0 – 4
(2.0)
(1.3)
n→σ* (2.6)
n→π* (1.7)
(4 – 5)
(2.4–4.1)
a
a
n→π* (conjugated systems)
π→π* (conjugated systems)
n→π*
π→π*
n→σ*
2.6 UV/Vis Spectroscopy
53
Compound Type Transition (log ε)
53
a longest wavelength absorption maximum
400
500
600
700 nm
300
200
R I
O
R
Cl
R NO
n = 0 – 4
n = 0 – 4
(2.0)
(1.3)
n→σ* (2.6)
n→π* (1.7)
(4 – 5)
(2.4–4.1)
a
a
n→π* (conjugated systems)
π→π* (conjugated systems)
n→π*
π→π*
n→σ*
2.6 UV/Vis Spectroscopy
53
Compound Type Transition (log ε)