"Front Matter". In: Organosilanes in Radical Chemistry - Index of

198 Silyl Radicals in Polymers and Materials
O
O
24
25
N
CH 3
N CH 3
X
N
N
N
N
N
N
CH3 N CH 3
26, X = O, NH
8.3.3 OTHER USEFUL RADICAL REACTIONS
Silyl radicals (Si) obtained by reaction of 2 or 4 with thermally generated
t-BuO: radicals add readily to pyrazine and nitroalkanes to form the corresponding
adducts 27 and 28 for which EPR spectra have been recorded [13].
N
N
Si
R N O Si
O
27 28
Polysilanes 2 and 4 reacted with nitroxides (TEMPO) under free-radical
conditions and in the absence of molecular oxygen to give the corresponding
amine in good yields (Reaction 8.13) [15]. The propagation steps for these
radical chain processes are thought to be similar to those reported for the
analogous reduction using (Me3Si) 3SiH (see Section 4.3.4).
N
O
8.4 SILYLATED FULLERENES
2 or 4
PhC(O)OOBu-t
120 �C, 2h
N
H
85 - 88%
(8.13)
The chemical modification of fullerenes has received considerable attention in the
last decade in order to achieve new applications to material sciences [27]. Fullerene-bonded
polysilane derivatives might be expected to show high conductivity
since C60-doped polysilane is found to be a good photoconductor [28]. Therefore,
a variety of silylated derivatives have been obtained to date, although the available
methods are limited to the photoinduced addition of various silanes to C60.