21752-80-7Relevant articles and documents
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West,R.,Jones,P.C.
, p. 6156 - 6161 (1969)
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Visiting the Limits between a Highly Strained 1-Zirconacyclobuta-2,3-diene and Chemically Robust Dizirconacyclooctatetraene
Rei?, Fabian,Rei?, Melanie,Spannenberg, Anke,Jiao, Haijun,Baumann, Wolfgang,Arndt, Perdita,Rosenthal, Uwe,Beweries, Torsten
, p. 5667 - 5674 (2018)
The reaction of the allene precursor Li2(Me3SiC3SiMe3) with [Cp2ZrCl2] (Cp=cyclopentadienyl) was examined. The selective formation of hitherto unknown linear, allene-bridged dizirconocene complexes [(Cp2ZrCl)2{?μ-(Me3Si)C3(SiMe3)?}] and [(Cp2Zr)2{?μ-(Me3Si)C3(SiMe3)?}2] was observed. Upon σ coordination of the allenediyl unit to {Cp2Zr}, pyrophoric Li2(Me3SiC3SiMe3) is tamed stepwise to yield a surprisingly robust 1,5-dizirconacyclooctatetra-2,3,6,7-ene with cumulated double bonds. This complex is unexpectedly inert against moisture, air, water and acetone. Surprisingly, it degrades under MS conditions to give the highly strained 1-zirconacyclobuta-2,3-diene. All compounds isolated have been fully characterised and the molecular structures are discussed. The stability and reactivity of these complexes are rationalised by DFT computations.
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Laguerre,M. et al.
, p. C34 - C36 (1978)
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Syntheses and Structure of 8-, 7-, and 6-Membered Silacycloallenes
Pang, Yi,Petrich, Scott A.,Young, Victor G.,Gordon, Mark S.,Barton, Thomas J.
, p. 2534 - 2536 (2007/10/02)
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