Neutron scattering reveals the persistent three-dimensional hydrogen-bonding network between glycerol molecules in the 1 : 2 choline chloride/glycerol eutectic.

1:2 Choline chloride:urea and 1:1 choline chloride:oxalic acid deep eutectic solvents (DES) are compared at 338 K using liquid-phase neutron diffraction with H/D isotopic substitution to obtain differential neutron scattering cross sections and fitting of models to the experimental data using Empirical Potential Structure Refinement (EPSR). In comparison to the previously reported study of choline chloride:urea at 303 K, we observed significant weakening and lengthening of choline-OH•••Cland choline-OH•••hydrogen-bond acceptor correlations.

The initial stage of oxidation of phenols by alkaline ferricyanide appears to be a reversible reaction between the phenol anion and the ferricyanide ion, giving ferrocyanide and a mesomeric aryloxy-radical. Irreversible reactions then follow, giving mixtures of dimeric and polymeric products. Though the rate of oxidation is dependent upon the alkalinity of the solution and on the [Ferricyanide] /[Ferrocyanide] ratio, Fieser's theory 1 concerning a " critical oxidation potential " for attack on a phenol gives far too simple an interpretation of the reactions involved.New dimeric products, both of ketonic and of diphenolic type, have been obtained from a number of mono-and di-substituted phenols, and a-(4-hydroxy-3 : 5dimethylphenyl) benzyl alcohol has been obtained from 4-benzyl-2 : 6-dimethylphenol.