1851-96-3Relevant academic research and scientific papers
Rates and Alkyl Group Size in Solvolysis of Alkyl Derivatives
Orlovic, Mirko,Kronja, Olga,Humski, Kresimir,Borcic, Stanko,Polla, Eugenio
, p. 3253 - 3256 (1986)
The logarithm of solvolysis rate constants in 80percent aqueous ethanol of 1,1-dimethyl-1-alkyl chlorides 1 and 1-phenyl-1-alkyl chlorides 2 decrease monotonically with increasing number of carbon atoms in the alkyl group.The first member of both series deviates from the corresponding correlation lines which have the some slope.In contrast, solvolysis rates in 80percent aqueous ethanol of 1-methyl-1-alkyl tosylates 3 do not depend upon the size of the alkyl group.The results are rationalized in terms of a mechanism that is very similar in reactions of series 1 and 2 but different from that of series 3.
Reductive Transformations, 19. Electron-Transfer-Induced Dimerization of β-Alkylstyrenes and the Structures of Resulting 1,4-Dilithiobutanes
Schade, Peter,Schaefer, Thomas,Muellen, Klaus,Bender, Dietmar,Knoll, Konrad,Bronstert, Klaus
, p. 2833 - 2842 (2007/10/02)
Upon reaction with lithium β-alkylstyrenes undergo dimerization of the resulting radical anions with the formation of 2,3-dialkyl-1,4-dilithio-1,4-diphenyl butanes 1-8.The structure and dynamic behavior of these dilithium organyls are investigated by cryoscopic measurements and 1H-, 13C-, and 6Li-NMR spectroscopy at different temperatures.The butane chain adopts a cisoid conformation; the two benzyl subunits chelate one lithium cation while the other is solvent-separated from the hydrocarbon frame.Depending on the size of the alkyl substitutents and the reaction temperature, the dimerization of the radical anions with the formation of two stereogenic centers can proceed diastereoselectively.Key Words: Lithium organyls/ 1,4-Dilithiobutanes, conformation of ,ion paris of, aggregation of
