Determination of relative acidity scales for some dipolar aprotic solvents by coulometry using a hydrogen-palladium electrode

Desiccant efficiency in solvent drying. 3. Dipolar aprotic solvents.

Spectroscopic determination of relative Brønsted acidity as a predictor of reactivity in aprotic ionic liquids.

A simple titration technique utilizing pyridine as a FTIR spectroscopy probe is demonstrated to successfully predict relative Brønsted acid-limited reaction rates in different ionic liquid (IL) environments. Relative acidity is shown to vary across three aprotic ILs in a manner that is specific to the particular acid-IL pairing.

Solution structures of ferrihaem in some dipolar aprotic solvents and their binary aqueous mixtures.

1. Conductivity and u.v. and visible spectroscopic techniques were used to investigate the solution structure of the prosthetic group of the ferric haemoproteins (ferrihaem) in dimethyl sulphoxide, NN-dimethylacetamide, NN-dimethylformamide and sulpholane, and certain of their aqueous mixtures. 2. In neutral or acid dimethyl sulphoxide, chlorohaemin is monomeric and completely dissociated into ...

Ionic Equilibria in Protic and in Dipolar Aprotic Solvents

Chemical interactions' as well as 'physical interactions' play an important part in solvation. Some equilibria are reversed on transfer froni protic to dipolar aprotic solvents and this behaviour can be interpreted and predicted through the solvent activity coefficients of the appropriate solutes. Some extrathermodynamic assumptions for the evaluation of single ion solvent activity coefficients...

Physical gelation of polar aprotic solvents induced by hydrogen bonding modulation of polymeric molecules.

Poly(aryl ether amide) containing o-nitroanilide forms a physical gel in polar aprotic solvents by solvent-induced change of hydrogen bonding modes, in which hydrogen bonding acceptor solvent molecules break intramolecular hydrogen bonding of o-nitroanilide and induce intermolecular hydrogen bonding.