Page 137 - Arrow Pushing in Inorganic Chemistry A Logical Approach to the Chemistry of the Main Group Elements

4.8 CARBENE AND ALKENE ANALOGS 117

Ari-Pr 4
E = Ge
Ge
Ar H
i-Pr 4
i-Pr 4 Ar NH 2
E + NH 3 H H
i-Pr 4 Ar + N
E = Sn −
i-Pr Ar Sn Sn Ari-Pr 4
4
−
N +
H H
(4.50)
Ari-Pr 4
HX i-Pr
Ge i-Pr
Ar H
i-Pr 4
X = CN, N 3 X
i-Pr Ar
4
i-Pr Ar =
Ge 4
Ari-Pr
Ar 4
i-Pr 4 i-Pr
HBF 4
Ge i-Pr
Ar H
i-Pr 4
F
The diarylgermylene also reacts with H ,giving(i-Pr Ar) GeH .
4
2
2
2
REVIEW PROBLEM 4.14*
Suggest simple polar mechanisms for each of the above reactions of (i-Pr Ar) E
2
4
(E = Ge, Sn).

Another structural framework that is sterically hindered enough to afford genuine diva-
lent group 14 (Si, Ge, Sn) compounds is the following (Kira, N., et al. J. Am. Chem. Soc.
1999, 121, 9722):

Me 3 Si
SiMe 3

E

SiMe 3
Me 3 Si