CH1012
                                         L1 /   
‹#›
                                         L1 /   
9
UV / VIS
Ultraviolet/Visible UV/Vis (l = 200 - 800 nm)
• UV / Vis absorption is due to an electronic excitation from:
  low E orbital ® high E orbital
UV absorption is most pronounced in conjugated multiple-bond systems ie. ones with alternating double – single bonds.
• The absorption corresponds to
a change in Eelectronic in the molecule.