Chemistry Reference
In-Depth Information
FIGURE 1.14.
Transient spectra generated by ultrafast LFP (308 nm) of phenyl azide
in 100% formic acid with time windows (a) 0-0.95 ps, (b) 1-30 ps, and (c) 30-1000 ps.
Source
: Reprinted with permission from Ref. 57.
p!p
transitions at 259 nm (
f
0.0284), respectively,
which is in fair agreement with the experimental results. Based on these calculations,
the known spectrum of
N
-methyl-
p
-tolylnitrenium ion, and the absence of the
500 nm absorbing transient in ACN, the assignment of the 500 nm band to PhNH
þ
appears secure.
The lifetime of PhNH
þ
is 110
¼
0.2429) and 450 nm (
f
¼
14 ps in 100% formic acid, which is in excellent
agreement with the value estimated by Fishbein and McClelland in aqueous
solution.
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