An Amidinate-Stabilized Germatrisilacyclobutadiene Ylide

作者：Yeong Hui Xian; Zhang Shu Hua; Xi Hong Wei; Guo Jing Dong; Lim Kok Hwa; Nagase Shigeru; So Cheuk Wai^*

来源：Chemistry - A European Journal, 2012, 18(9): 2685-2691.

DOI：10.1002/chem.201102201

• cyclobutadiene
• germanium
• N ligands
• silicon
• ylides

The synthesis and characterization of new amidinate-stabilized germatrisilacyclobutadiene ylides [L3Si3GeL%26apos;] (L=PhC(NtBu)2; L%26apos;=EL; E=Ge (3), Si (7)) are described. Compound 3 was prepared by the reaction of [LSi?SiL] (1) with one equivalent of [LGe?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.

• 出版日期2012-2
• 单位南阳理工学院