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Solid-State 29 Si NMR Study of RSiSiR: A Tool for Analyzing the Nature of the

Summary: Solid-State 29
Si NMR Study of RSiSiR: A Tool for Analyzing the Nature of the
Si-Si Bond
Victoria Kravchenko, Rei Kinjo, Akira Sekiguchi,*, Masaaki Ichinohe, Robert West,#
Yael S. Balazs, Asher Schmidt,*, Miriam Karni,*, and Yitzhak Apeloig*,
Department of Chemistry, Graduate School of Pure and Applied Sciences, UniVersity of Tsukuba,
Tsukuba, Ibaraki 305-8571, Japan, Organosilicon Research Center, Department of Chemistry, UniVersity of
Wisconsin, Madison, Wisconsin 53706-1396, and Schulich Faculty of Chemistry and the Lise Meitner-MinerVa
Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
Received August 18, 2006; E-mail: chrapel@tx.technion.ac.il; chrmiri@tx.technion.ac.il; sekiguch@chem.tsukuba.ac.jp;
The first stable disilynes, RSiSiR, R ) Si(CH(SiMe3)2)2(i-Pr)1
(1) and R ) SiMe(Si-t-Bu3)2
2 were recently synthesized after years
of frustrating attempts. 1 was characterized by X-ray crystallo-
graphy.1 1 is trans-bent (R ) 137.4) with r(Si1-Si1) ) 2.062 ,
significantly shorter than in RRSidSiRR (e.g., 2.15 for R )
SiMe3, R ) 2,4,6-triisopropylphenyl3). This is in line with earlier
theoretical (E ) Si-Pb)4 and experimental (E ) Ge-Pb)5 studies
showing that REER are trans-bent, in contrast to the linear geometry


Source: Apeloig, Yitzhak - Department of Chemistry, Technion, Israel Institute of Technology


Collections: Chemistry