Novel mu(3)-oxo complexes prepared from Cp*Zr(BH3R)(3) (R = H, CH3) and B(C6F5)(3) in diethyl ether

作者：Liu Fu Chen^*; Yang Chien Chan; Chen Shou Chon; Lee Gene Hsian; Peng Shie Ming

来源：Dalton Transactions, 2008, (27): 3599-3604.

DOI：10.1039/b719863a

From the reactions of Cp*ZrCl3 with 3 equiv. of LiBH3R (R = CH3, Ph), the organotrihydroborate complexes, Cp*Zr(BH3CH3)(3), 1, and Cp*Zr(BH3Ph)(3), 2, were isolated. One of the Zr-H-B bonding interactions in 2 could be described as an intermediate case between the bidentate and tridentate modes. Reactions of 1 and Cp*Zr(BH4)(3), 3, with Lewis acid B(C6F5)(3) in diethyl ether produced the novel 14-electron ionic compounds [(mu(3)-O)(mu(2)-OC2H5)(3){(Cp*Zr(OC2H5))(2)(BCH3)}][HB(C6F5)(3)], 4, and [(mu(3)-O)(mu(2)-OC2H5)(3){(Cp*Zr(OC2H5))(2)(BOC2H5)}][HB(C6F5)(3)], 5, respectively. These two unique compounds resulted from a sequential cleavage of Zr-H-B bonds of 1 and 3 and C-O bonds of ether followed by the formation of O-B bonds. The solid state single crystal X-ray analyses revealed that both compounds have similar structures. A mu(3)-oxygen bridges two zirconiums and a boron atom. The latter three atoms are further connected by three mu(2)-bridging ethoxy groups giving rise to three four-membered metallacycles within the structure of each cation.

• 出版日期2008
• 单位东华大学