Tetrapropyl ammonium bromide

The preparation of a borosilicate molecular sieve (termed by the authors "borozeosilite") at relatively low pH, in the neutral to acidic range, has been reported (25). A reaction mixture comprising a silica source, boric acid, tetrapropyl-ammonium bromide and an ammonium fluoride salt was digested hydrothermally at 170°C. Subsequent calcination of the product in air at 550°C was performed to remove organic template and to provide the hydrogen form of the molecular sieve. 

Materials. The reagents Mo(CO)e, W(CO)6, iodine, tetrapropyl-ammonium bromide, tetrabutylammonium iodide, propionic acid, benzoic acid, pivalic acid, and 1,2-dibromoethane were obtained from commercial sources and used without purification. The solvents chlorobenzene, 1,2-dichloroethane, o-dichlorobenzene, toluene, decahydronaph-thalene (decalin), and cyclohexane were purged 10-30 min with a stream of dry nitrogen prior to use. Acetonitrile was dried over molecular sieves (4A) and also purged with nitrogen prior to use. Benzene used in the preparation of MoW(02CC( 113)3)41 was carefully dried and stored over calcium hydride, then vacuum distilled into the reaction vessel when needed. 

Ammonium, tetramethyl-, bromide. See Tetramethylammonium bromide Ammonium, tetramethyl-, hydroxide. See Tetramethylammonium hydroxide Ammonium, tetramethyl-, iodide. See Tetramethyl ammonium iodide Ammonium, tetrapropyl-, bromide. See Tetrapropyl ammonium bromide Ammonium, tetrapropyl-, iodide. See Tetrapropyl ammonium iodide Ammonium thiocyanate CAS 1762-95-4 EINECS/ELINCS 217-175-6 UN 9092 (DOT)... 

Tetrapropyl ammonium bromide CAS 1941-30-6 EINECS/ELINCS 217-727-6 Synonyms Ammonium, tetrapropyl-, bromide Tetra-n-propylammonium bromide N,N,N-Tripropyl-1-propanaminium bromide Empiricai Ci2H2sBrN Formuia (CH3CH2CH2)4N Br Properties Wh. to off-wh. cryst. solid sol. ( 21.5 C) > 100 mg/ml in water, DMSO, 95% ethanol, sol. 10-50 mg/ml in acetone sol. > 10% in chloroform m.w. 266.26 m.p. 270 C (dec.)... 

Tetra-n-propylammonium bromide. See Tetrapropyl ammonium bromide Tetrapropyl ammonium iodide CAS 631-40-3 EINECS/ELINCS 211-157-1 Synonyms Ammonium, tetrapropyl-, iodide 1-Propanaminium, N,N,N-tripropyl-, iodide Tetra-n-propylammonium iodide N,N,N-Tripropyl-1-propanaminium iodide Empirical C12H28IN... 

N,N,N-Tripropyl-1-propanaminium bromide. See Tetrapropyl ammonium bromide N,N,N-Tripropyl-1-propanaminium iodide. See Tetrapropyl ammonium iodide Tripropylsilane... 

Benzyl trimethyl ammonium hydroxide Cetrimonium bromide Dimethyl diallyl ammonium chloride Laurtrimonium bromide Laurtrimonium chloride Methyl tributyl ammonium chloride Tetrabutyl ammonium bromide Tetrabutyl ammonium chloride Tetrabutyl ammonium fluoride Tetra-n-butyl ammonium hydrogen sulfate Tetra-n-butyl ammonium hydroxide Tetrabutyl ammonium iodide Tetrabutylphosphonium acetate, monoacetic acid Tetrabutylphosphonium bromide Tetrabutylphosphonium chloride Tetraethylammonium bromide Tetraethylammonium hydroxide Tetrakis (hydroxymethyl) phosphonium chloride Tetramethylammonium bromide Tetramethylammonium chloride Tetramethylammonium hydroxide Tetramethyl ammonium iodide Tetraphenyl phosphonium bromide Tetrapropyl ammonium bromide Tetrapropyl ammonium iodide Tributylamine Tributyl phosphine Tributyl (tetradecyl) phosphonium chloride Trioctyl (octadecyl) phosphonium iodide catalyst, phase-transfer Tetraethylammonium chloride Tetraoctylphosphonium bromide Tri-n-butyl methyl ammonium chloride Tri methyl phenyl ammonium hydroxide catalyst, phenolics Triethylamine... 

Tetrapropyl ammonium bromide 1948-33-0 Avox TBHQ t-Butyl hydroquinone Eastman MTBHQ Embanox TBHQ Sustane TBHQ Tenox TBHQ Uantox TBHQ 1963-36-6... 

NCE = normal (1M KC1) calomel electrode, TMA = tetramethyl ammonium, TEA = tetraethyl ammonium, TPA = tetrapropyl ammonium, TBA = tetrabutylammonium, N = nitrate, B = bromide,... 

Mobile-phase modifiers. The modifiers that have been used with the AGP CSP encompass uncharged and charged compounds and include 2-propanol, N,N-dimethyIoctyIamine, tetrapropyl- and tetrabutyl-ammonium bromide, and octanoic acid (see Fig. 12). The addition of these modifiers to the mobile phase usually results in a decrease in the retention of solutes, with an accompanying decrease in enantioselectivity (a). However, in some instances, the addition of a modifier results in an increase in a. 

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