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Triethylamine is the chemical compound with the formula N(CH 2 CH 3) 3, commonly abbreviated Et 3 N. Like triethanolamine and tetraethylammonium , it is often abbreviated TEA. [ 8 ] [ 9 ] It is a colourless volatile liquid with a strong fishy odor reminiscent of ammonia .
A higher value for pK aH corresponds to a stronger base. For example, the values pK aH (C 5 H 5 N) = 5.25 and pK aH ((CH 3 CH 2) 3 N) = 10.75 indicate that (CH 3 CH 2) 3 N (triethylamine) is a stronger base than C 5 H 5 N (pyridine).
The nitrogen atom in DIPEA is more hindered than the nitrogen atom in triethylamine. However, triethylamine is a slightly stronger base than DIPEA; the pK a values of the respective conjugate acids in dimethyl sulfoxide are 9.0 and 8.5, respectively. [10]
Triethanolamine is used primarily in making surfactants, such as for emulsifier.It is a common ingredient in formulations used for both industrial and consumer products. The triethanolamine neutralizes fatty acids, adjusts and buffers the pH, and solubilizes oils and other ingredients that are not completely soluble in wate
As the name suggests, a non-nucleophilic base is a sterically hindered organic base that is a poor nucleophile.Normal bases are also nucleophiles, but often chemists seek the proton-removing ability of a base without any other functions.
In the last step of the catalytic cycle the auxiliary base (usually triethylamine or pyridine) deprotonates the protonated DMAP, reforming the catalyst. The reaction runs through the described nucleophilic reaction pathway irrespective of the anhydride used, but the mechanism changes with the pKa value of the alcohol used.
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Triethylenetetramine (TETA and trien), also known as trientine when used medically, is an organic compound with the formula [CH 2 NHCH 2 CH 2 NH 2] 2.The pure free base is a colorless oily liquid, but, like many amines, older samples assume a yellowish color due to impurities resulting from air oxidation.