Zirconium-silene complex

Mori M (2005) Synthesis and Reactivity of Zirconium-Silene Complexes. 10 41-62... [Pg.292]

Mori M (2005) Synthesis and Reactivity of Zirconium-Silene Complexes. 10 41-62 Moriuchi T, Hirao T (2006) Ferrocene-Peptide Bioconjugates. 17 143-175 Morokuma K, see Musaev G (2005) 12 1-30... [Pg.282]

Possible Reaction Course for the Formation of Zirconium-Silene Complex. . 51... [Pg.41]

Abstract When Cp2ZrCl2 was treated with 2 equivalents of Me2PhSiLi, a zirconium-silene complex was formed. In the presence of alkyne, diarylalkyne reacted with silene coordinated with zirconium to give silazirconacyclopentene, which was hydrolyzed to give vinylsilane. On the other hand, dialkylalkyne inserted into zirconium-silene complex to give silazirconacyclopentene, which was hydrolyzed to give allylsilane. Formation of the zirconium-silene complex was monitored by H NMR spectra. [Pg.41]

Keywords Zirconium-silene complex Silene Azazirconacyclopropane Azazirconacyclopentene Cp2Zr (SiMe2Ph)... [Pg.41]

To examine the reactivity of a zirconium-silicon bond, Mori et al. synthesized a zirconium-silicon complex from Cp2ZrCl2 and Ph/BuSiLi (1 equiv.) and investigated the reactivity of this complex [ 14]. Furthermore, they found that the reaction of Cp2ZrCl2 with 2 equivalents of Me2PhSiLi gave disilylzirconocene, which was easily converted into a zirconium-silene complex via /J-hydrogen elimination (Scheme 1) [15]. This is the first example of the formation of an early transition metal-silene complex. In this chapter, the reactivity of the zirconium-silene complex is described. [Pg.45]

Scheme 9 Reaction of zirconium-silene complex and enyne...

Although silene is known to be unstable, this zirconium-silene complex is easily generated from disilylzirconocene 2a by -hydrogen elimination in situ. However, the isolation of the zirconium-silene complex is difficult, and it immediately reacts with alkyne to form the azazirconacyclopentene. [Pg.53]

To confirm the generation of a zirconium-silene complex, the reaction of Cp2ZrCl2 and Me2PhSiLi 8b in the presence of bis-4-methoxyphenylacetylene 14b was monitored by XH NMR (Scheme 12). [Pg.53]

Reactivity of Silazirconacydopentene Formed from a Zirconium-Silene Complex 2.4.1... [Pg.56]

The reaction of zirconium-silene complex 3 with alkyne was carried out, and it was clear that an alkyne having aryl or vinyl groups inserts into the zirconium-silicon bond of zirconium-silene complex 3, while an alkyne possessing two alkyl groups inserts into the carbon-zirconium bond of 3 (Scheme 11). [Pg.56]

A zirconium-silene complex was obtained during the course of our study on the synthesis of a zirconium-silyl complex. The zirconium-silene complex is formed from disilylzirconocene 2a, generated from Cp2ZrCl2 and 2 equivalents of Me2PhSiLi 8b. Zirconium-silene complex 3 should be in a state of equilibrium with zirconacyclopropane 3. The insertion of diaryl alkyne 14 or vinyl alkyne... [Pg.60]

Since zirconium-silene complex 3 could be easily synthesized in situ, the insertion of various compounds into the zirconium-silicon or zirconium-carbon bonds of silazirconacyclopropane 3 will be investigated in a future study, and it is expected that a novel carbon-carbon or carbon-silicon bond-forming reaction will be developed. [Pg.61]

Insertion reaction of alkyne and zirconium-silene complexes 883, which are generated from disilylzirconocenes 882 prepared from the reaction of zirconocene dichloride with 2equiv. of Me2PhSiLi, affords... [Pg.925]

Kuroda S, Sato Y, Mori M (2000) Reaction of silazirconacyclopentene formed from zirconium-silene complex and alkyne with isocyanide. J Organomet Chem 611 304-307... [Pg.71]

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