102434-74-2Relevant academic research and scientific papers
Relative Reactivities of Alkyl-Substituted Alkenes and Cycloalkenes towards Diarylcarbenium Ions
Mayr, Herbert,Pock, Rudolf
, p. 2473 - 2496 (2007/10/02)
The relative reactivities of alkyl-substituted alkenes 4 towards diarylmethyl cations 2 generated in situ from diarylmethyl chlorides 1 and Lewis acids were determined by competition experiments.The relative reactivities were almost independent of the nature of the Lewis acid. Eventual differences of the solvation free enthalpies of various activated complexes are, therefore, independent of the nature of the gegen ions.The rate acceleration by methyl groups - 6-50 by CH3 at the attacked vinylic position and approximately 104 at the developing carbenium centre - indicates a scarcely bridged transition state.
η2-BENZOPHENOZIRCONOCEN, EIN MODELL FUER DAS REACTIONSVERHALTEN EINES METALLAOXIRANS?
Erker, Gerhard,Rosenfeldt, Frank
, p. 29 - 42 (2007/10/02)
Thermolysis of η2-benzoyl(phenyl)zirconocene yields the η2-benzophenonzirconocene complex 2, isolated as a dimer. 2 exhibits an ambivalent reactivity pattern.The formation of five-membered metallacycles from 2 and olefinic hydrocarbons possibly proceeds analogous to reactions of "normal" metal-olefin ?-complexes.However, both reactions with the electron-deficient olefins dimethylfumarate and -maleate and the behavior towards electrophilic and protic reagents as well as aromatic hydrocarbons might be interpreted in terms of a metallaoxirane-character of 2.
