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Tetramethylammonium hydrate

Tetramethylammonium Hydrate.—Palmaer 4 electrolyzed a solution of the hydrate in liquid ammonia in a Dewar vessel at about — 41°. Deep-blue rings having the color of a solution of sodium in liquid ammonia appeared at the cathode when the circuit was closed. A solution of free tetramethylammonium is probably formed, which could not be isolated. The chloride behaves like tetramethylammonium hydrate. [Pg.118]

To further probe the phase behavior of hydrated Nafion, Rollet et al. used a contrast matching method in the SANS analysis of Nafion membranes neutralized with tetramethylammonium ions. With 12 hydrogen atoms per counterion, the N(CH3)4+ ions... [Pg.313]

Caution. The use of predried tetramethylammonium hydroxide penta-hydrate has resulted in a serious explosion during the solid-phase metathesis of potassium superoxide with tetramethylammonium hydroxide pentahydrate. This can be avoided by using the pentahydrate as supplied without drying and by employing an increased amount of potassium superoxide. The latter can easily be separated during the liquid ammonia extraction. [Pg.37]

Aqueous solutions of molybdate and arsenate, pH 3-5, contain [AsMo903i(H20)3]3 and an As2Mo6 anion.71 The exact structure of the latter ion in solution is in some doubt, although the tetramethylammonium sodium salt contains the anion shown in Figure 15. Low angle X-ray scattering measurements of aqueous molybdoarsenate solutions are not compatible with this structure and the anion may be hydrated in a fashion similar to that observed for the analogous... [Pg.1042]

For describing the dissociation of fer-butyl-chloride (tButCl), we performed MC calculations on fBut+, CF and tetramethylammonium, (CH3)4N+ (TMA+). TMA+ is used as a benchmark because the experimental hydration energy of fBut+ is unknown. We calculated the solvated minimal energy reaction path (MERP) as obtained from the gas phase, i.e., the Cl atom is stepwise removed from the central carbon atom, while the geometry of the fBut group was optimized. [Pg.89]

Conjugated dienes can be reduced to monoolefins by treatment with hydrogen, hydrated cobalt chloride, potassium cyanide, potassium chloride, sodium hydroxide, and tetramethylammonium chloride or benzyltri-ethylammonium chloride as the phase-transfer catalyst. The hydridopen-tacyanocobaltate anion, HCo(CN)s3, is the probable metal catalyst (47-... [Pg.197]

Mootz D, Seidel R (1990) Polyhedral clathrate hydrates of a strong base phase relations of crystal structures in the system tetramethylammonium hydroxide-water. J Inclusion Phenom 8 139-157... [Pg.515]

McMullan RK, Mak TCW, Jeffrey GA (1966) Polyhedral clathrate hydrates. XI. Structure of tetramethylammonium hydroxide pentahydrate. J Chem Phys 44 2338 -2345... [Pg.528]

Harmon KM, Avci GF, Gabriele JM, Jacks MJ (1987) Hydrogen-bonding, Part 22. Re-evaluation of stoichiometry and structure of lower hydrates of tetramethylammonium hydroxide. J Molec Struct 159 255-263... [Pg.542]

Fig. 2.42. Orientational change of a water molecule in the first hydration shell of a tetramethylammonium ion (TMA ). (a) A water molecule in the first hydration shell is attached to the TMA ion by charge-electric dipole interaction, (b) Orientational change of a water molecule in the first hydration shell is complemented by formation of another hydrogen bond to an outer water molecule. (Reprinted from Y. Nagano, H. Mizuno, M. Sakiyama, T. Fujiwara, and Y. Kondo, J. Phys. Chem. 95 2536, 1991.)... Fig. 2.42. Orientational change of a water molecule in the first hydration shell of a tetramethylammonium ion (TMA ). (a) A water molecule in the first hydration shell is attached to the TMA ion by charge-electric dipole interaction, (b) Orientational change of a water molecule in the first hydration shell is complemented by formation of another hydrogen bond to an outer water molecule. (Reprinted from Y. Nagano, H. Mizuno, M. Sakiyama, T. Fujiwara, and Y. Kondo, J. Phys. Chem. 95 2536, 1991.)...
Mootz, D. and Staben, D., Clathrate hydrates of tetramethylammonium hydroxide - new phases and crystal-structures. Z. Naturforsch. B - Chem. Sci. 47, 263-274 (1992). [Pg.222]

An analysis of data for nitrogen-containing heterocyclic compounds and tetramethylammonium bromide has been made by Pottel and Kaatze in terms of a hydration sheath surroimding the solute molecule. [Pg.292]

Potassium sodium tetramethylammonium aluminum silicate hydrate,... [Pg.243]

K2Al4NNaO Sii4C4H,2 7H2O, Potassium sodium tetramethylammonium aluminum silicate hydrate, 22 65 K2Bi4N20,2C36H7j, Potassium,... [Pg.268]

The Li- and Na-NMR spectra are quite sensitive on the degree of hydration and the nature of the counterions (either SiO or (Al-O-Si) groups). The 13C-NMR analysis yields valuable information on the molecules incorporated into the zeolitic cages or channels during the synthesis. These molecules may remain intact (e.g. tetrapropylammonium in ZSM-5 or hexamethonium in ZSM-50) or are partially decomposed (e.g. tetramethylammonium in ZSM-39 and hexamethonium in ZSM-48 in presence of ammonium ions). [Pg.30]

The specific effects of salts come from differences in their screening ability. The larger size of the hydrated positively charged cation in the neutral salt, the more efficiently it can screen and the more rapid the gel time. The effect is particularly pronounced with large organic cations such as guanidine, tetramethylammonium, and tetraethanol-ammonium ions. [Pg.749]


See other pages where Tetramethylammonium hydrate is mentioned: [Pg.154]    [Pg.67]    [Pg.694]    [Pg.695]    [Pg.172]    [Pg.143]    [Pg.439]    [Pg.2360]    [Pg.27]    [Pg.1048]    [Pg.150]    [Pg.109]    [Pg.193]    [Pg.194]    [Pg.270]    [Pg.152]    [Pg.2359]    [Pg.126]    [Pg.71]    [Pg.348]    [Pg.20]   
See also in sourсe #XX -- [ Pg.118 ]




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Tetramethylammonium

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