Journal
JOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume 690, Issue 2, Pages 291-300Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2004.09.026
Keywords
phenyltrihydroborate; organohydroborate; hydroborate; crystal structure; zirconocene; titanocene
Categories
Ask authors/readers for more resources
The phenyltrihydroborate complexes, Cp2ZrCl{(mu-H)(2)BHPh}, 1, and CP2Zr{(mu-H)(2)BHPh}(2).(1/2 toluene), 2, were prepared from the reactions of Cp2ZrCl2 with one and two moles of LiBH3Ph. The Zr-H-B bonds in 2 are stable under vacuum at 100 degreesC for hours without significant decomposition. An inductive effect has been proposed for this strong interaction. This hydrogen bridge bond can be broken upon reacting with the Lewis base N(C2H5)(3) to produce (C2H5)(3)N.BH2Ph and the zirconium hydride compound Cp2ZrH{(mu-H)(2)BHPh}, 3. Compound 3 also can be prepared from the reaction of Cp2ZrHCl with LiBH3Ph. The reaction of 1 with the Lewis acid B(C6F5)(3) is solvent dependent, the metathesis product Cp2ZrCl{(mu-H)(2)B(C6F5)(2)}, 4, was formed in the toluene solution, whereas the ionic complex [Cp2ZrCl(OEt2)][HB(C6F5)(3)], 5, was isolated from the ether solution. The reaction of titanocene dichloride, Cp2TiCl2, with LiBH3Ph produced a 17-electron, paramagnetic complex, Cp2Ti {(mu-H)(2)BHPh}, 6. Single crystal X-ray structures of 1, 2, 3, 4, 5, and 6 were also determined. A coplanar structure of the four bridge hydrogens in 2 was observed. (C) 2004 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available