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- W2312431569 abstract "The amine elimination reaction of Me2Si(1-indenyl)2 (1, (SBI)H2) and Hf(NMe2)4 (2) affords rac-Me2Si(η5-1-indenyl)2Hf(NMe2)2 (rac-3, rac-(SBI)Hf(NMe2)2) in 20% isolated yield. This reaction proceeds by initial formation of a mono(indenyl) intermediate, (η5-C9H6SiMe2C9H7)Hf(NMe2)3 (4), which reacts reversibly with a second equivalent of 2 to form a binuclear complex, {μ-η5:η5-Me2Si(1-indenyl)2}{Hf(NMe2)3}2 (5), and undergoes reversible intramolecular amine elimination to form rac-3 and meso-3. The novel C1-symmetric ansa-metallocene {Me2Si(η5-1-indenyl)(η3-2-indenyl)}Hf(NMe2)2 (6), in which one of the indenyl groups is bridged through the 2-position, is observed as a side product in the synthesis of 3. Complex 6 has been prepared in 21% isolated yield by thermolysis of 4 (or mixtures of 1 and 2) at 160 °C and can be converted to {Me2Si(η5-1-indenyl)(η3-2-indenyl)}HfMe2 (7, 100% NMR) by reaction with AlMe3. The molecular structures of rac-3 and 6 have been determined by X-ray crystallography." @default.
- W2312431569 created "2016-06-24" @default.
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- W2312431569 date "1997-06-01" @default.
- W2312431569 modified "2023-10-14" @default.
- W2312431569 title "Synthesis and Structures of <i>rac</i>-Me<sub>2</sub>Si(η<sup>5</sup>-1-indenyl)<sub>2</sub>Hf(NMe<sub>2</sub>)<sub>2</sub> and {Me<sub>2</sub>Si(η<sup>5</sup>-1-indenyl)(η<sup>3</sup>-2-indenyl)}Hf(NMe<sub>2</sub>)<sub>2</sub>" @default.
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- W2312431569 doi "https://doi.org/10.1021/om970242g" @default.
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