Reducing agents identification

TYZOR ET is reduced by sodium and ethanol to a dark-blue compound (182). Use of potassium as the reducing agent in the alcohol permits the isolation and identification of Ti(OC2H2)3 [22922-82-3] and Ti(OC4Hg)3 [5058-41-3] (183,184). The products precipitate as soUd alcoholates,... 

A conformational study of /3-arteether 11, by H and 13C NMR, showed that the solution of /3-arteether 11 is similar to that of its X-ray structure <1999J(P2)2089>. The interaction of artemisinin 1 with manganese tetraphenylpor-phorin, in the presence of a reducing agent, was studied by UV-visible (UV-Vis) and H NMR <1997CR59>. A series of rules using 1-D and 2-D NMR spectroscopy for identification of relative stereochemistry of substituted antimalarials, related to artemisinin 1, were reported <1997SPL241>. 

Characterization of unidentified peaks by their behavior against reducing agents and by interpretation of ESI-MS and ESI-MS-MS spectra More than 30 SE compounds detected, commercially available standards and ESI-MS analysis used for species identification... 

I.R., N.M.R. and Mass spectroscopy, which is quite useful from the angle of identification and characterization of reaction intermediates. In part III, detailed treatment of commonly used oxidizing and reducing agents along with involved reaction mechanism has been presented. 

Characteristic of an azo compound is the ease with which the molecule is cleaved at the double bond by reducing agents to give two amines. Since amines are colorless, the reaction is easily followed by the color change. The reaction is of use in preparation of hydroxyamino and similar compounds, in analysis of azo dyes by titration with a reducing agent, and in identification of azo compounds from an examination of the cleavage products. 

Identifications and analyses of azo dyes can be performed by several techniques. These are absorption spectroscopy (i.e., visible, UV, and IR spectroscopy), fluorescence analysis, and GC. Chemical testings involve reduction methods. Reducing agents such as zinc dust, stannous chloride, and sodium hydrosulfite can split the azo linkage, producing the diazonium and the coupling fragments. The cleaved products may be... 

In lesson C the student must know the definition of molarity and moles, the quantitative relationship of a chemical equation to determine quantities of reactants and products for reactions. Lesson D has the following objectives Assignment of oxidation numbers to elements according to a set of rules balancing oxidation-reduction equations by the half-reaction method and identification of oxidizing and reducing agents. 

A very thorough investigation by Kitson and Mellon reveals that hardly any ions cause interference and only chromate and dichromate ions were found to interfere in concentration equivalent to the phosphate concentra-tion.2 Reducing agents will reduce the complex to molybdenum blue, a feature actually used in some determinations. Organic ions such as citrate, tartrate, and oxalate will form a complex with molybdate. It should be kept in mind though that these compounds are reported as potential interferences in quantitative determination. Whether they could actually eliminate a false positive reaction in an identification is questionable. When used for quantitative determinations the color is reported to be stable for 3 h, while otiiers report a stability of 24 h. ... 

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