The gas-phase elimination kinetic of 4-bromobutyric acid to give butyrolactone, and hydrogen bromide was studied using Density Functional Theory (DFT) and Mǿller-Plesset Perturbation Theory of Second Order (MP2) to investigate the more reasonable reaction mechanism. Good agreement of calculated activation parameters with the experimental values was obtained when using PBEPBE/6-31++G(d,p) level ...

The dehydrobromination reaction 2-(p-nitrophenyl)ethyl bromide + OH⁻ was investigated in several alkanediyl-α-ω-bis(dodecyldimethylammonium) bromide, 12-s-12,2Br⁻ (with s = 2, 3, 4, 5, 6, 8, 10, 12) micellar solutions, in the presence of NaOH 5 × 10⁻³ M. The kinetic data were quantitatively rationalized within the whole surfactant concentration range by using an equation based on the pseudophas...

A hydrophilic ionic liquid monomer (i.e. 1-(a-methyl acrylate)-3-vinylimidazolium bromide) was immobilized on carboxylated multi-walled carbon nanotubes (MWNTs) by ion exchange, then reversible addition–fragmentation chain transfer precipitation polymerization (RAFTPP) was performed in the presence of a template, imidacloprid. The obtained imidacloprid imprinted material showed a netlike struct...

The title complex, [Cu(2)Br(3)(C(11)H(9)N(2)O(2))](n), was one of three isolated by slow evaporation of an acetonitrile reaction mixture of CuBr(2) with di-2-pyridyl ketone (1:1 molar ratio). The title complex contains a 2:1 metal-to-ligand ratio of copper(II) with the hydrated form of the ligand, di-2-pyridylmethane-diol. The two copper centers are bridged by a bromide ion and the alk-oxy O at...

A novel and simple capillary ion chromatographic method for the determination of iodide is reported. Separation was achieved on a laboratory-made packed capillary column (100 mm × 0.32 mm i.d.) packed with triacontyl-functionalized silica, followed by a modification with hexadimethrine bromide, where 1 mM sodium chloride-acetonitrile (95:5, v/v) was used as the eluent and UV-absorbing analyte ...

Nitric oxide-releasing mesoporous silica nanoparticles (MSNs) were prepared using an aminosilane-template surfactant ion exchange reaction. Initially, bare silica particles were synthesized under basic conditions in the presence of cetyltrimethylammonium bromide (CTAB). These particles were functionalized with nitric oxide (NO) donor precursors (i.e., secondary amines) via the addition of amino...

lon-chromatography, a relatively new technique in a nal yti cal chemistry, has already shown great promise toward solving complex trace analysis problems, in particular the speciat ion and quantitation of allion~. It is especially attractive to the fi e ld of microanalysis. The method of sample preparation, however, is (Tucial in order to realize this capac it y. Existing microanalytical method...

The membrane potential of the human platelet was investigated using the membrane potential probes 3,3'-dipropyl-2,2'-thiadicarbocyanine iodide and tritiated triphenylmethylphosphonium bromide. The membrane potential in physiologic buffer was estimated to be 52-60 mV inside negative. The membrane was depolarized when extracellular potassium or hydrogen ion concentrations were increased. Changes ...

In the title compound, C(18)H(40)NO(2) (+)·Br(-), the ion pairs formed by the hydrogen-bonded bromide anions and organic cations are arranged into thick layers with the alkyl groups directed to the inside and the trimethyl-aminium groups and the bromide anions situated on the layer surface. The long alkyl chain in the cation adopts an all-trans conformation. In the crystal structure, molecules ...

The title complex, [AgBr(C7H7NS)(C18H15P)2], was obtained from the reaction of silver(I) bromide with benzene-carbo-thio-amide (C7H7NS) and tri-phenyl-phosphane (C18H15P) in the mixed solvent of aceto-nitrile and ethanol. The mononuclear complex exhibits a distorted tetra-hedral coordination geometry about the metal atom, arising from one S atom of a benzene-carbo-thio-amide ligand, two P atoms...