2- ethyl triethyl ammonium

The residue then was dissolved in 30 ml of 0.04 M aqueous triethyl-ammonium bicarbonate buffer (pH 7.5), (resulting pH 5.6). It was chromatographed on a DEAE cellulose column (HCOJ form) (3.4 X 15.0 cm), with elution first with 500 ml of water and then with a linear gradient of trimethylammonium bicarbonate at pH 7.2 (0-0.07 M). XXVII was completely resolved from some of XXVIII which was formed under the above reaction conditions. However, it was still contaminated by small amounts of cAMP and ethyl 2-diazo-malonic acid. These impurities were apparently generated from the hydrolysis of some XXVII when the triethylammonium bicarbonate was removed. Pure samples of XXVII were obtained by preparative paper chromatography on either Whatman 40 or 3 MM paper with overnight development with ethanol 0.5 M ammonium acetate, pH 7.0 (5 2, v/v). 

TMA = tetra-methyl ammonium, TPA = tetra-propyl ammonium, Et-Py- = N-ethyl pyridinium, DIQ-6 = 1,6 hexa-methylene bis (trimethyl ammonium bromide), DIQ-6 = 1,6 hexa-methylene bis (benzyldimethyl ammonium bromide) and DIQ-6 = 1,6 hexa-methylene bis (triethyl ammonium bromide). 

The behaviour of selenium-containing acids might be expected to parallel that of the sulphur acids, but the position is not so clear. e-Alkyl esters are the products of similar alkylations of sodium salts by alkyl halides and are also produced from hydrogenphos-phonates and diselenides according to equation 19. The reaction between the triethyl-ammonium salt of (R)-(+)-0-ethyl ethylphosphonoselenoic acid and McjSiCl affords the laevorotatory O-silyl ester rather than the 5 e-silyl ester as demonstrated by NMR spectroscopy and also by alternative synthesis By contrast, the use of the sodium salt of the acid leads to the 5 -silyl ester. ... 

Fig. 10. 360 MHz iR-NMR spectrum of CMP-Neu5Ac (as triethylammonium-salt) dissolved in 2H2O, recorded at p2R 8 and 25 °C. Multiplets at 81.3 and 3.2 represent ethyl groups of triethyl ammonium counter ions.

MeCN/MeOH/ethyl acetate, 88 10 2 MeOH/MeCN/ CH2Cl2/hexane, 65 27 4 4 MeCN/MeOH/ CH2C12 (75 20 15) containing 0.1% BHT and 0.05% triethyl-amine (the MeOH contains 0.05 M ammonium acetate)... 

The infiuence of water on the reaction between ammonia and hydrogen chloride to form ammonium chloride may be taken up in the same way. Although very little is known of the way the water actually catalyzes the formation of ammonium chloride, the reaction considered in Chapter IV in the formation of tetraethylammonium iodide from triethyl amine and ethyl iodide in the presence of different solvents indicated the method of action of the catalyst. It was found that unsaturation of the solvent paralleled to a certain extent the increase in the velocity of the reaction. Ability to form addition compounds, intermediate or otherwise, seemed to be the controlling factor. Unfortunately, the composition of the intermediate addition compound is not so definite in the present case. In order... 

Tetraethoxysilane. See Ethyl silicate Tetraethylammonium bromide CAS 71-91-0 EINECS/ELINCS 200-769-4 Synonyms Ammonium, tetraethyl-, bromide Ethanaminium, N,N,N-triethyl-, bromide TEAB Tetrylammonium bromide N,N,N-Triethylethanaminium bromide Classification Nonaromatic amine Empirical CaH2oBrN Formula (C2Hs)4N Br ... 

Synonyms Protein hydrolysates, leather, N,N-diethyl, diethyl sulfate, quaternized Protein hydrolysates, leather, N,N,N-triethyl, ethyl sulfate Protein hydrolysates, leather, N,N,N-triethyl-, ethyl sulfate (salts) Triethonium hydrolyzed animal protein ethosulfate Definition Quaternary ammonium deriv. of hydrolyzed animal protein... 

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