aprotic

(redirected from Protic solvent)
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Related to Protic solvent: Polar solvent

aprotic

(eɪˈprəʊtɪk)
adj
(Chemistry) chem (of solvents) neither accepting nor donating hydrogen ions
References in periodicals archive ?
10,005,984 B2; Ecolab has patented a liquid cleaning composition comprising a nonionic surfactant; one or more coupling agents including a protic solvent, an aromatic sulfonate, or mixture thereof; a neutral salt; and a foam promotion or stabilizing agent comprising an alkyl dimethyl amine oxide and an olefin sulfonate.
Analysis of the reference data presented in Table 1 has shown that DMSO has a higher dielectric constant and a higher dipole moment than ethanol, but judging by the empirical parameter [E.sub.T.sup.N], its polarity is much lower than that of ethanol; besides, it is a hydrogen bond acceptor ([beta] = 0.73), while ethanol is a hydrogen bond donor ([alpha] = 0.86), i.e., it is a protic solvent. It is known that when solvent mixtures are used, selective solvation of the substance proceeds, i.e., the formation of a shell from the molecules of the preferred solvent near the solute molecule [24].
Mixtures of AN +3- HPN have great affinity to dissolve the alkali metal electrolytes because 3-HPN is a protic solvent and has great solubility property towards electrolytes [12].The aim of this work is to report the experimental data of densities and viscosities of alkali metal bromides in AN, 3-HPN and in a 50% AN +3-HPN mixture at different temperatures to determine the activation and thermodynamic parameters like energy of activation 6Ev , Gibbs energy change 6G and entropychange 6S .
The in-situ treatment of silica particles with hexamethylenedisilazane (HMDZ) under basic conditions, along with the addition of protic solvent such as ethyl alcohol, gave the hydrophobic silica nano particle sol-gel solution.
It was reported that, in polar protic solvent [22, 23], such as in H O, CH OH, the aggregation tendency of MPcs becomes stronger with increasing the polarity of solvents.
The lower regioselectivity refers to the possible influence of water as a protic solvent, shifting the selectivity toward [alpha]-oxidation, while [Et.sub.3]N has a tendency to shift the oxidation toward [gamma]-oxidation like in the case of t-BuOOH described above.
Ionic liquid possessing its low-toxic, stable, circulation usage characters, could catalyze the Michael-addition in hantzsch reaction procedure, employed to act both solvent and catalyst in the Hantzsch reaction as the result of the activity of the ionic liquid [Bmim]Cl*AlCl3 was much better than only protic solvent and aprotic solvent, so the reaction time could be shorten to less than 4 h and the yield were higher than that reported in literature[15-20].