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Inne
Alkylation of cyclopentadienyl rings in the reactions of nickelocene with organolithium compounds.
Autorzy
Rok wydania
1999
Czasopismo
Journal of Organometallic Chemistry
Numer woluminu
585
Strony
308-314
DOI
10.1016/S0022-328X(99)00241-7
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The reaction of nickelocene with tert-butyllithium has been studied. It was found that unstable species {CpNiC(CH3)3}, formed in this reaction, reacted further in two directions: β-H elimination and homolytic cleavage of Ni–C bond. Hydrogen elimination product formed trinickel cluster (NiCp)3CCH(CH3)2 1, while t-butyl radical alkylated cyclopentadienyl rings to form several compounds. One of these compounds, {Ni[C5H4C(CH3)3]}2[C5H5C(CH3)3] 3, has been isolated and fully characterised. The compound crystallizes from hexane in a triclinic crystal system and space group. Corresponding unit cell parameters were determined as a=7.520(2) Å; b=13.150(5) Å; c=13.625(4) Å; α=113.77(3)°; β=97.42(3)°; γ=90.02(3)°; V=1220.7(7) Å3; Z=2. It is the first example of alkylation of cyclopentadienyl rings bonded to nickel by organolithium compounds.
Słowa kluczowe
Nickel, Lithium, Cyclopentadienyl, Alkylation, Crystal structure
Adres publiczny
https://doi.org/10.1016/S0022-328X(99)00241-7
Strona internetowa wydawcy
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