Affiliation:
1. Faculty of Chemistry, University of Bielefeld, Universitätsstrasse 25, D-33615 Bielefeld, Germany.
Abstract
The reaction of decamethylsilicocene, (Me
5
C
5
)
2
Si, with the proton-transfer reagent Me
5
C
5
H
2
+
B(C
6
F
5
)
4
–
produces the salt (Me
5
C
5
)Si
+
B(C
6
F
5
)
4
(2), which can be isolated as a colorless solid that is stable in the absence of air and moisture. The crystal structure reveals the presence of a cationic π complex with an η
5
-pentamethylcyclopentadienyl ligand bound to a bare silicon center. The
29
Si nuclear magnetic resonance at very high field (δ = – 400.2 parts per million) is typical of a π complex of divalent silicon. The (η
5
-Me
5
C
5
)Si
+
cation in 2 can be regarded as the “resting state” of a silyliumylidene-type (η
1
-Me
5
C
5
)Si
+
cation. The availability of 2 opens new synthetic avenues in organosilicon chemistry. For example, 2 reacted with lithium bis(trimethylsilyl)amide to give the disilene
E
-{(η
1
-Me
5
C
5
)[N(SiMe
3
)
2
]Si}
2
(3).
Publisher
American Association for the Advancement of Science (AAAS)
Reference28 articles.
1. Spectroscopic identification of the SiH+ molecule: The A1Π–X1Σ+ system
2. N. Grevesse, A. Sauval, Astron. Astrophys.9, 232 (1970).
3. P. D. Singh, F. G. Vanlandingham, Astron. Astrophys.66, 87 (1978).
4. P. J. Bruna, S. D. Peyerimhoff, Bull. Soc. Chim. Belg.92, 525 (1983).
5. Ab initio configuration interaction study of the electronic spectrum of SiH+
Cited by
198 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献