Chemistry Reference
In-Depth Information
N
N
N
N
N
N
N*
237
233
N
*
FV
T
FV
T
*
N
*
*
N
N
N
N
N
234
236
235
Δ
+
*
N
*
*
*
NCN
CN
238
239
*
NC
*
N
CN
*
*
H
240
241
*
=
15
N or
14
N
SCHEME 8.37.
229
is also the
main product of FVT. Finally, one more signal observed in the ESR spectrum is
attributed to the phenyl carbene derivative
and
230
are the end products of matrix photolysis, and the nitrile
230
; this, too, corresponds to a Type II
ring opening (Scheme 8.36). An analogous ring opening is seen in 2-quinazolinyl
nitrene (Scheme 8.40).
61
231
8.4.2.4 9-Phenanthridinyl Nitrene and 9-Acridinyl Nitrene. FVT of tetrazolo-
phenanthridine
with Ar matrix isolation of the products (to generate the azide)
followed by irradiation at 254 nm gave rise to strong ESR signals belonging to at
least two different nitrenes; they are assigned to 9-phenanthridinyl nitrene
233
234
and
