Electrophilicity parameters for 2-benzylidene-indan-1,3-diones—a systematic extension of the benzhydrylium based electrophilicity scale
作者:Stefan T. A. Berger、Florian H. Seeliger、Florian Hofbauer、Herbert Mayr
DOI:10.1039/b708025e
日期:——
Kinetics of the reactions of four 2-benzylidene-indan-1,3-diones (1a-d) with carbanions (2a-I) have been studied photometrically in dimethylsulfoxide solution at 20 degrees C, and the electrophilicity parameters E were determined by the linear free energy relationship log k(2)(20 degrees C) = s(N + E) (eqn (1)). The rate-determining step of these reactions is the nucleophilic attack of the carbon
Complexes cationiques η3-1′,2,3-[(methylene-2γ-butyrolactone)-yl-3]-(η5-cyclopentadienyl)carbonylnitrosyl molybdene: Synthese et etudes des additions nucleophiles stereoselectives
作者:C. Benamou、J. Benaim
DOI:10.1016/0022-328x(85)88114-6
日期:1985.2
Compound (η3-CH2H)(η5-C5H5)(CO)(NO)Mo is obtained when a carbonyl ligand of the molybdenumcomplex (η3-CH2H)(η5-C5H5(CO)2Mo is replaced by the isoelectronic nitrosyl cation. In a polar solvent containing the exo-endo conformers of η3-1′,2,3-(2γ-methylenebutyrolacton-3-yl)(η5-cyclopentadienyl)dicarbonyl molybdenum (I), the reaction is stereoselective and proceeds with conformational interconversion