20982-51-8Relevant academic research and scientific papers
Ion-molecular reactions of free ethylsilicenium ions with alcohols in the gas phase
Kochina,Shchukin,Nefedov,Sinotova
, p. 885 - 888 (2007/10/03)
Ion-molecular reactions of free ethylsilicenium ions with methanol and isobutanol in the gas phase were studied radiochemically. Within the reaction time the ethylsilicenium ion completely isomerizes into the dimethylsilicenium ion. The reaction mechanism was suggested.
Comparison of ΔG°Acid (gas phase) and kinetic acidities measured in methanolic sodium methoxide
Koch, Heinz F.,Biffinger, Justin C.,Mishima, Masaaki,Mustanir,Lodder, Gerrit
, p. 614 - 617 (2007/10/03)
Hydron exchange rates, kexc (M-1s-1), using methanolic sodium methoxide were compared with ΔG°Acid, (kcal mol-1) (gas phase) for 9-phenylfluorene, C6H5CH(CF3)2, m-CF3C6H4CH(CF3)2, p-CF3C6H4CHClCF3, m-CF3C6H4CHClCF3, 3,5-(CF3)2C6H3CHClCF3, fluorene and C6F5H. There is a good linear correlation for p-CF3C6H2CHClCF3, m-CF3C6H4CHClCF3 and 3,5-(CF3)2C6H3CHClCF3, with the others falling off the line. The fluorinated benzyl compounds and pentafluorobenzene have near-unity isotope effects and therefore differ from the fluorenyl compounds. Although the acidity and the exchange rates for three of the compounds [9-phenylfluorene, C6H5CH(CF3)2 and p-CF3C6H4CHClCF3] are similar, the important proton-transfer step to form a hydrogen-bonded carbanion intermediate and the subsequent breaking of that weak bond to form a free carbanion in methanol differ significantly for the fluoernyl compound compared with the two fluorinated benzylic compounds.
Photochemically Induced Hydrogen Isotope Exchange between Naphthalene and Methanol in the Presence of Aliphatic Diamines
Gebicki, Jerzy,Kielbasinska, Elzbieta,Lisiecka, Mariola,Reimschuessel, Wladyslaw
, p. 85 - 89 (2007/10/02)
Studies on the photochemically induced hydrogen isotope exchange between methanol and naphthalene or naphthalene in the presence of α,ω-diaminoalkanes (R2N-(CH2)n-NR2; n = 1, 2, 3, 6, R = CH3 or C2H5), 1,4-dimethylpiperazine, 1,4-diazabicyclooctane (DABCO) and triethylamine are reported.The reaction mechanism involving radical ions formed by the solvation of the exciplex is discussed.
