Journal of Organometallic Chemistry p. 131 - 138 (1993)
Update date:2022-08-23
Topics:
Mashima, Kazushi
Yamanaka, Yoshimichi
Gohro, Yoshihiko
Nakamura, Akira
Treatment of Cp*TaCl4 with 4 equiv of phenylallylMgBr in THF afforded Cp*Ta(1-phenylallyl)2 (2), whose structure was characterized by a single crystal X-ray study as 16-electron two legged piano stool with two allyl moieties in supine-supine geometry.In this reaction, the starting TaV complex was reduced to a TaIII species accompanying the formation of reductive allyl-coupling products, diphenyl-1,5-hexadiene derivatives 3. ?-Donor molecules such as carbon monoxide, tert-butyl isocyanide, isocyanates and isothiocyanates induced the coupling reaction of two phenylallyl groups on tantalum to give 1,6-diphenyl-1,5-hexadiene (3a).The intermediate Cp*Ta(tert-BuNC)2(η2,η2-1,6-diphenyl-1,5-hexadiene) (5) was characterized by 1H NMR spectroscopy.Complex 2 was the catalyst precursor for the selective dimerization of isocyanates.Oxygen donor molecules such as DMSO and pyridine-N-oxide reacted with 2 to afford 1:1 adducts.One-electron oxidation of 2 with ferrocenium cation resulted in the formation of 1-phenyl-1-propene.The TaIV complexes,
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Doi:10.1021/ja01015a076
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(1995)Doi:10.1002/hlca.19380210147
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(1989)Doi:10.1021/ja01015a010
(1968)