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• W2313721876 abstract "The amine elimination reaction of (SBI)H2 (3, Me2Si(1-indenyl)2) and Zr(NMe2)4 (2) affords rac-(SBI)Zr(NMe2)2 (4) in 65% isolated yield. This reaction proceeds via initial formation of a mono(indenyl) intermediate, (η5-C9H6SiMe2C9H7)Zr(NMe2)3 (6). Intermediate 6 reacts reversibly with a second equivalent of 2 to form a binuclear complex, {μ-η5:η5-Me2Si(1-indenyl)2}{Zr(NMe2)3}2 (5), which was prepared independently by the reaction of 3 and 2 equiv of 2. Complex 6 also undergoes reversible intramolecular amine elimination to form rac-4 and meso-4. The equilibrium between 6 and 4 + NMe2H strongly favors 6. rac-4 is the kinetic product of the intramolecular amine elimination of 6, the thermodynamic rac-4/meso-4 ratio is 4/1, and the rac-4/meso-4 isomerization is catalyzed by NMe2H. Therefore, the removal of NMe2H from the reaction mixture is the most important factor in controlling the yield of 4 and the rac-4/meso-4 ratio. The molecular structures of rac-4 and meso-5 have been determined by X-ray crystallography. rac-4 is cleanly converted to rac-(SBI)ZrCl2 (rac-1, 100% NMR) by reaction with Me3SiCl and to rac-(SBI)ZrMe2 (rac-7, 92% isolated) by reaction with AlMe3." @default.
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• W2313721876 date "1996-09-17" @default.
• W2313721876 modified "2023-10-16" @default.
• W2313721876 title "Synthesis, Structure, and Reactivity of <i>rac</i>-Me₂Si(indenyl)₂Zr(NMe₂)₂" @default.
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• W2313721876 doi "https://doi.org/10.1021/om960104b" @default.
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