169617-76-9Relevant academic research and scientific papers
Synthesis and structure of zirconium-group 13 heterobimetallic compounds
De Rege, Francis M. G.,Davis, William M.,Buchwald, Stephen L.
, p. 4799 - 4807 (2008/10/09)
The reaction of main-group (B, Al, and Ga) alkoxides with zirconocene complexes of benzynes was used to prepare novel zirconium-group 13 heterobimetallic compounds [R2E-(μ-OR′)(μ-1,2-aryl)Zr(η5-C 5H5)2] [E = B, R = Et, R′ = Me, aryl = phenyl (1); E = B, R = Me, R′ = Et, aryl = phenyl (2); E = B, R = Et, R′ = Me, aryl = 3-methoxyphenyl (3); E = Al, R = Et, R′ = Et, aryl = phenyl (5); E = Ga, R = Me, R′ = Me, aryl = 3-methoxyphenyl (6)] and [(EtO)2B(μ-1,2-naphthyl)Zr(η5-C5H 5)2(OEt)] (4). Complexes 3 and 4 have been characterized by X-ray crystallography. Compound 3 contains a dative bond from an oxygen lone pair of the methoxy ligand on the zirconium to an acceptor p-orbital on the boron atom (11B NMR; δ 8.26 ppm). In contrast, the weakly Lewis acidic boron center in 4 (11B NMR; δ 29.7 ppm) does not show a bonding interaction between the alkoxy ligand on the zirconocene fragment and the boron center.
