aprotic solvent

aprotic solvent

[ā′präd·ik ′säl·vənt]
(chemistry)
A solvent that does not yield or accept a proton.
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N-Methyl-2-Pyrrolidone, also referred to as N-Methylpyrrolidone, is an organic, colourless, polar aprotic solvent characterised by relatively lower volatility and higher flash point.
The solvent used was tetrahydrofuran, an aprotic solvent with dielectric constant (e) 7.
The present work deals with the electrochemical reduction of various carbonyl compounds such as (1) Acetone (2) Acetophenone (3) 4-Choloro benzaldehyde was carried out by using the weak acid (Phenol) in aprotic solvent for the synthesis of the Pinacol.
It is comprised of heating to a temperature between 130[degrees]C-180[degrees]C a mixture comprised of one or more ethylenically unsaturated monomers; an initiator system comprising a compound selected from the group consisting of persulfates, peroxides, diazos, and combinations thereof; a substantially aprotic solvent system; and maintaining the temperature of the mixture for a time sufficient to polymerize the monomers to a monomer to polymer conversion percentage of at least 95% by weight, wherein the polymer has a weight average molecular weight between approximately 900 and 7,000 Dalton, a hydroxyl number of at least 240 and an acid number greater than 240.
Any aprotic solvent (no groups that will react with the urethane)--aromatic hydrocarbons, aliphatic hydrocarbons, esters, and ketones--can be used.
The anion pi-radicals of four structurally-related 2-substituted fused-ring oxazoles have been electrochemically generated at a platinum electrode in an aprotic solvent.
Typically, PUDs and HPDs are prepared using an aprotic solvent such as N-methylpyrrolidone (NMP).
The compound 3, prepared directly before the oxidation, was dissolved in aprotic solvent (0.
All the measurements were carried out in aprotic solvent Hexamethylphosphortriamide (HMPA) at four different temperatures 5oC, 15oC, 25oC and 35oC.
The general principle of molecular imprinting is as follows: (1) Specific complex formed based on (non)-covalent bonding interactions between template molecule and polymerizable functional monomer in an apolar and aprotic solvent before polymerization by assembling the functional monomers around the template molecule; (2) A rigid and porous copolymer yields in the presence of crosslinker and initiator; (3) The distinct cavities remains in the copolymer with the removal of the target template, which is tailor-made complementary to the template molecule in size, shape and functionality.
However, membranes themselves are nearly always produced using costly, harmful and environmentally unfriendly aprotic solvents such as N-methyl-pyrrolidone (NMP), dimethylformamide (DMF), or dimethylacetamide (DMAC).