57070-99-2Relevant articles and documents
Substituted diaryldiazomethanes and diazofluorenes: Structure, reactivity and stability
Davis, Philip J.,Harris, Lawrence,Karim, Aman,Thompson, Amber L.,Gilpin, Martin,Moloney, Mark G.,Pound, Matthew J.,Thompson, Claire
supporting information; experimental part, p. 1553 - 1556 (2011/04/26)
The synthesis of several substituted diaryldiazomethanes and diazofluorenes, and an assessment of their structure, reactivity and stability, is reported.
A Relationship between Selectivity and Solvent Composition for Nucleophilic Attack on Carbocations in Alcohol-Water Mixtures
Bentley, T. William,Ryu, Zoon Ha
, p. 761 - 768 (2007/10/02)
Rate constants and products of solvolyses of p-methoxybenzyl chloride 1, chlorodiphenylmethane 2 (Y = Z = H), chloro(4-chlorophenyl)phenylmethane 2 (Y = H, Z= Cl) and chlorobis(4-chlorophenyl)methane 2 (Y = Z = Cl) are reported in ethanol- and methanol-water mixtures at 25 deg C.Product selectivities (S), defined by: S = / are related to four rate constants for reactions involving one molecule of solvent as nucleophile and another molecule of solvent as general base catalyst (e.g. kwa involves water as nucleophile and alcohol as general base, and kww, kaw and kaa are defined similarly).A linear relationship between 1/S and molar ratios of solvent 1/S = (kwa/kaw)(/) + kww/kaw is derived theoretically and validated experimentally for solvolyses of the above substrates from water up to 70percent alcohol-water-in this range of solvents, the contribution from kaa can be neglected.For solvolyses of p-methoxybenzyl chloride, S is independent of pH between pH 2 and 12, S decreases when acetone is added but increases if acetonitrile is added and for 90percent ethanol-water S increases with added LiCl and LiClO4 and increases further if acetonitrile is also present.