Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    The mechanism of η(η5:η5-fulvalene)-di-μ-chloro-bis (η5-cyclopentadienyltitanium) formation in the system Cp2TiCl2 : LiAlH4 : Olefinic solvent (1980)
    Springer
    Transition metal chemistry 5 (1980), S. 5-10 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The reduction of Cp2TiCl2 with LiAlH4 in olefinic solvents at temperatures above 100° leads to the formation of µ-(η 5 :η 5-fulvalene)-di-µ-chloro-bis(η 5-cyclopentadienyl-titanium) (1) and finally to µ-(η 5 :η 15-fulvalene)-di-µ-hydrido-bis (η 5-cyclopentadienyltitanium). The first step of the reduction includes mainly the formation of the dimer of bis(η 5-cyclopentadienyl)titanium(III) chloride, (Cp2TiCl)2. The mechanism of its conversion into (1) involves the formation of an intermediate bis(η 5-cyclopentadienyl)titanium(III) hydride species which reacts immediately with the olefinic solvent to give bis(η 5-cyclopentadienyl)alkyltitanium(III) compounds. The formation of the fulvalene ligand in (1) is explained by the interaction of the alkyltitanium compound with the cyclopentadienyl ligands of (Cp2TiCl)2 resulting in hydrogen transfer to the olefinic solvent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01396856
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Preparation of μ-(η5:η5-Fulvalene)-di-μ-hydrido-bis(η5-cyclopentadienyltitanium) by the reduction of Cp2TiCl2 with LiAlH4 in aromatic solvents (1981)
    Springer
    Transition metal chemistry 6 (1981), S. 90-93 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary μ-(η5:η5-Fulvalene)-di-μ-hydrido-bis(η5-cyclopentadienyltitanium) (1) can be prepared by the reduction of Cp2TiCl2 with LiAlH4 in methylbenzenes and in tetralin at their boiling temperatures in yields greater than 90%. The reduction proceedsvia the bis(η5-cyclopentadienyl)titanium(III) chloride dimer which is further transformed into the unstable [Cp2TiH] species. Thermal decomposition of the latter accompanied by hydrogen evolution gives rise to (1). μ-(η5:η5-Fulvalene)-μ-hydrido-μ-chloro-bis(η5-cyclopentadienyltitanium), the first fulvalene containing compound observed in the system is formed by hydrido-chloro exchange of (1) with (Cp2TiCl)2 and aluminium chlorohydrides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00626113
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Copolymerization of 5-norbornen-2-yl acetate with cycloalkenes by the metathesis catalyst WCl6/(CH3)4Sn (1992)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 193 (1992), S. 95-99 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Ring-opening metathesis copolymerization of 5-norbornen-2-ylSystem. name: bicyclo[2.2.1]hept-5-en-2-yl. acetate (NBEAc; 80% endo) with cyclooctene (COE) and norborneneSystem. name: bicyclo[2.2.1]hept-2-ene. (NBE) was studied using WCl6/(CH3)4Sn as catalytic system. The copolymerization parameters (r1 = r2 = 1 for the NBEAc/NBE system and r1 = 1/r2 = 132 for the NBEAc/COE system) show that the reactivity of the monomers is not affected by the presence of an ester substituent but that it depends on the structure of the hydrocarbon cycle. Thus the well known inhibition effect of the ester group may be concluded not to lie in the propagation step of the catalytic cycle.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1992.021930109
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...