where π* is an index of the solvent dipolarity / polarizability, β is a measure of the solvent hydrogen-bonding acceptor (HBA) basicity, α is a measure of the solvent hydrogen-bonding donor (HBD) acidity and ν0 is the regression value of the solute property in cyclohexane as the reference solvent.
or as proposed for the SORs, where a lysine residue close to the metal site may act as a proton-donor or enhance the acidity of a water molecule in the site (see section 7).
The Cl− > H+/OH− selectivity of anionophores showed a consistent positive correlation with the degree of Cl− encapsulation and a negative correlation with the acidity of hydrogen-bond donors.
Oxidized sulfur ligands are weaker donors and can increase the Lewis acidity of the liganded metal center, which influences affinity and coordination.
These include the fluxes of electron donor and acceptor, the ionic flux, the acidity and alkalinity fluxes at anode and cathode respectively, the electron transport flux at the biofilm, and the reactant/product crossover flux.
A disadvantage of DESs using acids as hydrogen bond donor limits DESs' application in the catalysis of epoxides even in other biosynthesis because of comparative strong acidity.
Owing to their increased polarity and N H acidity, thioamides are better hydrogen-bond donors than amides, while the sulfur atom functions as a weaker hydrogen-bond acceptor.
This trend can be rationalized by the π-donor capability of phenoxide that reduces the Lewis acidity of the boron center.
13a, 15 The H-bond properties of TFE and HFIP are generally considered to originate from the strong inductive effect of fluorine, leading to statements in the literature such as "the ability of fluorine …… as an inductive activator of a H-bond donor group" 16 and "fluorination always increases H-bond acidity".
Though Eu III) prefers ionic binding with a strong acid ligand, it is also capable of weak binding with a neutral oxygen donor at pH 3 and 4. Sorption is affected by solution acidity despite the absence of ion exchange.
The correlative equations Q = f (acidity, basicity of the solvent) where Q = δE0f or log ks, Gutmann's donor (DN) and acceptor (AN)_ numbers and Reichardt Krygowski's BKT and ENT were presented.
