Tetraethylammonium chloride

Tetraethylammonium chloride hydrate [56-34-8] M 165.7, m dec>200 . Crystd from EtOH by adding diethyl ether, from warm water by adding EtOH and diethyl ether, from dimethylacetamide or from CH2CI2 by addition of diethyl ether. Dried over P2O5 in vacuum for several days. Also crystd from acetone/CH2Cl2/hexane (2 2 1) [Blau and Espenson J Am Chem Soc 108 1962 1986 White and Murray J Am Chem Soc 109 2576 1987]. 

FIG. 9 Upper potential values, a.sds lower potential values, b.sds of the first oscillation at the interface between phases o and wl of the octanol membrane (A), interfacial potential of a two-phase octanol-water system in the absence of SDS, c.sds (B) and those in the presence of 10 mM SDS (in the case of inorganic electrolyte, 1 mM), d.sds (C)- TMACI tetramethylammonium chloride TEACI tetraethylammonium chloride TPACI tetrapropylammonium chloride TBACI tetra-butylammonium chloride AcNa sodium acetate PrNa sodium propionate, BuNa sodium n-butyrate VaNa sodium w-valerate. (Ref 27.)... 

Isonitriles, Anthranilates, Tetraethylammonium chloride Bossio, R. et al., J. Heterocycl. Chem., 1995, 32 (4), 1115 A one pot synthesis of heterocycles involving the above reagents and catalyst sometimes showed an induction period followed by violent reaction. 

TEA chloride See tetraethylammonium chloride., te,e a klorjd ) technetium chem A transition element, symbol Tc, atomic number 43 derived from uranium and plutonium fission products chemically similar to rhenium and manganese isotope Tc has a half-life of 200,000 years used to absorb slow neutrons in reactor technology. tek ne-she-om ... 

Indium metal (0.3 g) is maintained at +50 V in a solution phase of 100 mL benzene-methanol (3 1, v/v) to which 2 g of tetraethylammonium chloride is added. The solvents are purified as described in Section A above. Chlorine is bubbled through the solution as in Section B. Under these conditions, a current of 30 mA is recorded. 

As further evidence of the importance of hydrophobic interactions in these systems, we examined the partition coefficient of methyl orange in the presence of water structure-forming and water structure-breaking salts above and below the transition temperature [70], Methyl orange is an easily detected, hydro-phobic dye which has been sulfonated to improve water solubility. Water structure-breaking salts like tetraethylammonium chloride (TEAC) are known to minimize hydrophobic interactions while water structure-forming salts like ammonium sulfate are known to increase hydrophobic interactions [165, 166]. 

Tetracyanoethylene, A 143 Tetraethylammonium bisulfate, A057 Tetraethylammonium chloride, A053 Tetraethylammonium formate, AQ.24 Tetraethylammonium hydroxide, AO56 Tetraethylthiuram disulfide, AS76... 

Iron halides react with halide salts to afford anionic halide complexes. Because iron(III) is a hard acid, the complexes that it forms are most stable with F and decrease in both coordination number and stability with heavier halides. No stable I complexes are known. [FeF5(H20)]2 is the predominant iron fluoride species in aqueous solution. The [FeF6]3 ion can be prepared in fused salts. Whereas six-coordinate [FeClJ3 is known, four-coordinate complexes are favored for chloride. Salts of tetrahedral [FeClJ can be isolated if large cations such as tetraphenylarsonium or tetraalkylammonium are used. [FeBrJ is known but is thermally unstable and disproportionates to iron(II) and bromine. Complex anions of iron(II) halides are less common. [FeClJ2 has been obtained from FeCl2 by reaction with alkali metal chlorides in the melt or with tetraethylammonium chloride in deoxygenated ethanol. 

In this study they condensed the a-glycosyl bromide (243) with the disaccharide (245) in the presence of silver carbonate — silver perchlorate to give the a-linked tri-saccharide (241) in 58% yield or the bromide (244) with the disaccharide (246) in the presence of the mixed silver catalysts to give the a-linked trisaccharide (242) in 63 % yield. In the earlier approach, the preparation of the P-chloride (237) required a previous treatment of the a-bromide with tetraethylammonium chloride under carefully controlled conditions. 

Tetraethylammonium chloride (C2H5)4N+Ch Aqueous solution (saturated) 43.54... 

Spirocyclization Enamides of 2-iodobenzoic acid such as 1 undergo spirocy-clization at 45-80° in CH3CN containing K2C03, (QHj NCl (1 equiv.), and catalytic amounts of Pd(OAc)2 in a 1 2 ratio. The tetraethylammonium chloride permits milder conditions and retards isomerization of the double bond. The reaction can be extended to enamides of type 2. 

Acetic anhydride Tetraethylammonium chloride Phosphorous oxychloride Triphenylmethyl chloride 1,3-Dichloro-l, 1,3,3-... 

Roberts E, Beeble VJ, Woods CG, Taylor GR. Potassium permanganate and tetraethylammonium chloride are a safe and effective substitute for osmium tetroxide in solid-phase fluorescent chemical cleavage of mismatch. NAR... 

Figure 4 A series of stacked plots demonstrating the increase in signal (d = 0) due to chloride (from sodium chloride) in DMSO-d6with increasing chloride concentration (20-3000 ppm). The signal at <5 ca. 70 is chlorine from tetraethylammonium chloride. Reproduced from Lim et al.26...

In a similar fashion, the absorption of DSCG was improved by the addition of tetraalkylammonium salts. The fat solubility of the salt correlated with its ability to improve penetration. That is, the rank order of lipophilicity and the ability to improve the permeation of DSCG is choline chloride, tetraethylammonium chloride, tetra-n-butylammonium chloride. 

Figure 25. Computed pair-correlation functions for tetraethylammonium chloride in water at 298 K where c2— 0-4 mol dm-3.

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