An amidinate-stabilized Germatrisilacyclobutadiene Ylide
Author
Yeong, Hui-Xian
Zhang, Shu-Hua
Xi, Hong Wei
Guo, Jing-Dong
Lim, Kok Hwa
Nagase, Shigeru
So, Cheuk-Wai
Date of Issue
2012School
School of Chemical and Biomedical Engineering
School of Physical and Mathematical Sciences
School of Physical and Mathematical Sciences
Abstract
The synthesis and characterization of new amidinate-stabilized germatrisilacyclobutadiene ylides [L3Si3GeL′] (L=PhC(NtBu)2; L′=ËL; Ë=Ge (3), Si (7)) are described. Compound 3 was prepared by the reaction of [LSi[BOND]SiL] (1) with one equivalent of [LGe[BOND]GeL] (2) in THF. Compound 7 was synthesized by the reaction of 2 with excess 1 in THF. The bisamidinate germylene [L2Ge:] (4) is a by-product in both reactions. Moreover, compound 7 was prepared by the reaction of 3 with one equivalent of 1 in THF. Compounds 3 and 7 have been characterized by NMR spectroscopy, X-ray crystallography, and theoretical studies. The results show that compounds 3 and 7 are not antiaromatic. The puckered Si3Ge four-membered rings in 3 and 7 have a ylide structure, which is stabilized by amidinate ligands and the electron delocalization within the Si3Ge four-membered ring.
Type
Journal Article
Series/Journal Title
Chemistry - a European journal
Collections
http://dx.doi.org/10.1002/chem.201102201
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