86 research outputs found
How Electrophilic are Ferrocenylmethyl Cations? Kinetics of their Reactions with Nucleophiles and Hydride Donors
Second-order rate constants for the reactions of the ferrocenylmethylium ions 2a - e with silyl enol ethers, allylsilanes, allylstannanes, and hydride donors have been determined photometrically and conductometrically in dichloromethane. The ferrocenylmethylium ions 2a - d (fc-CHR+, R = H, Me, Ph, An) are slightly stronger electrophiles than the tropylium ion, and their electrophilic reactivities depend only slightly on the nature of R. The bis(ferrocenyl)methylium ion 2e is a considerably weaker electrophile, comparable to the tricarbonyl(cyclohexadienyl)iron cation
Studien �ber Tetrafluoroborate und Hydroxotrifluoroborate. VI. Zustandssysteme Bortrifluorid-Fluorwasserstoff-BF3 � ROH (R = H oder CH3)
Studien �ber Tetrafluoroborate und Hydroxotrifluoroborate. VIII. Bin�res System Metabors�ure-Fluorwasserstoff
Studien �ber Tetrafluoroborate und Hydroxotrifluoroborate. III. Tern�res System: Hydroxotrifluorobors�ure - Oxoniumtetrafluoroborat - Wasser
Studien �ber Tetrafluoroborate und Hydroxotrifluoroborate IV. Liquidus-Polytherme des quatern�ren reziproken Systems H3O(BF3OH) + HF ? H3O(BF4) + H2O
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