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In the Ultraviolet (UV) Range, Pyrimidine Has Maximum Absorptions at 240

Question 50

Multiple Choice

In the ultraviolet (UV) range, pyrimidine has maximum absorptions at 240 nm and 280 nm, and the absorption at 280 nm is due to nonbonding electron excitation.  The nonbonding electrons on nitrogen in pyrimidine undergo which of the following transitions when absorbing UV light?


A) π → π*
B) n → π*
C) π* → π
D) π* → n

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