Gas Chromatography of Catecholamines using Dimethyl Sulfoxide as an Effective Solvent for Trimethylsilylation.
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چکیده
منابع مشابه
DFT study of dimers of dimethyl sulfoxide in gas phase
Density functional (DFT) calculations at M05-2x/aug-cc-pVDZ level were used to analyze the interactions between dimethyl sulfoxide (DMSO) dimers. The structures obtained have been analyzed with the Atoms in Molecules (AIMs) and Natural Bond Orbital (NBO) methodologies. Four minima were located on the potential energy surface of the dimers. Three types of interactions are observed, CH•••O, CH•••...
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with the experimental log kobsd values. Application of the test to reactions with Ph2CHCl, which gives S N ~ kinetics and products with no evidence of radical-type products, gave linear Marcus-type plots and log ksET values corresponding to the experimental log kobsd values. It was concluded that the “SN2 reactions” of 9-R2N-Flions with Ph2CHCl are occurring by a radical pair mechanism. This ap...
متن کاملAmino Acid Analysis: Aqueous Dimethyl Sulfoxide As Solvent for the Ninhydrin Reaction
Methyl Cellosolve (the monomethyl ether of ethylene glycol) has been widely used as the organic solvent in ninhydrin reagents for amino acid analysis; it has, however, properties that are disadvantageous in a reagent for everyday employment. The solvent is toxic and it is difficult to keep the ether peroxide-free. A continuing effort to arrive at a chemically preferable and relatively nontoxic ...
متن کاملAmino Acid Analysis: Aqueous Dimethyl Sulfoxide As Solvent for the Ninhydrin Reaction
Methyl Cellosolve (the monomethyl ether of ethylene glycol) has been widely used as the organic solvent in ninhydrin reagents for amino acid analysis; it has, however, properties that are disadvantageous in a reagent for everyday employment. The solvent is toxic and it is difficult to keep the ether peroxide-free. A continuing effort to arrive at a chemically preferable and relatively nontoxic ...
متن کاملAmino acid analysis: aqueous dimethyl sulfoxide as solvent for the ninhydrin reaction.
Methyl Cellosolve (the monomethyl ether of ethylene glycol) has been widely used as the organic solvent in ninhydrin reagents for amino acid analysis; it has, however, properties that are disadvantageous in a reagent for everyday employment. The solvent is toxic and it is difficult to keep the ether peroxide-free. A continuing effort to arrive at a chemically preferable and relatively nontoxic ...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1967
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.15.1493