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The use of a water-soluble formazan complex to quantitate the cell number and mitochondrial function ofLeishmania major promastigotes [PDF]
Zeitschrift Für Parasitenkunde (Berlin, Germany), 1994 Udgivelsesdato: 1994-nullOne of the methods to quantitate Leishmania major promastigotes (LmP) has been to utilize the formation of a formazan dye, which in turn is produced via conversion of an artificial substrate, 3-(4,5-dimethylthiazol-2-yl)-2,5 ...
Arsalan Kharazmi, Kharazmi A
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Tetrahedron, 1997
Abstract The 1-aza-2-azoniaallene salts 3 react with 3-cyanoformazans 4–6 to give the corresponding 5-(1,5-diarylformazan-3-yl)triazolium salts 7–9 or the rearrangement derivatives 10–12 or the oxidation products 13–15. Reaction of 3a,d with the crown cyanoformazan 18 gave the corresponding crown-formazanyltriazolium salts 19a,d.
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Abstract The 1-aza-2-azoniaallene salts 3 react with 3-cyanoformazans 4–6 to give the corresponding 5-(1,5-diarylformazan-3-yl)triazolium salts 7–9 or the rearrangement derivatives 10–12 or the oxidation products 13–15. Reaction of 3a,d with the crown cyanoformazan 18 gave the corresponding crown-formazanyltriazolium salts 19a,d.
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Tetrazolium salts and formazans
2020Tetrazolium salts discussed here are of the 2-H type, and contain one or more five-membered heterocyclic rings, each of which carries a delocalized positive charge. Such a tetrazolium compound may be represented by a pair of Kekule forms. Tetrazolium salts can be reduced to formazans by a variety of mild reductants, including those of enzyme-catalyzed ...
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Organic formazan-based corrosion inhibitor for carbon steel in acidic medium: A synergistic experimental and theoretical study [PDF]
Results in ChemistryThis study presents the synthesis, characterization, and corrosion inhibition potential of a novel formazan derivative derived from a Schiff base precursor, offering a promising approach for carbon steel protection in acidic environments. The Schiff base
Luay Ali Khaleel +2 more
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The Formazan Reaction in Carbohydrate Research
1958Publisher Summary This chapter discusses the formazan reaction in carbohydrate research. A significant new method for preparing formazans is that of Ried and Hoffschmidt, which makes the heterocyclic formazans easily accessible by way of substituted esters of pyruvic acid.
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ChemInform Abstract: PYRIMIDINE FORMAZANS
Chemischer Informationsdienst, 1976AbstractAus den Pyrimidylhydrazonen (I) und Diazoniumsalzen (II) werden die Pyrimidylformazane (III) hergestellt und spektroskopisch auf die wahrscheinlichsten tautomeren Formen untersucht.
E. S. KARAVAEVA +3 more
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New Aspects of the Chemistry of Formazans
Russian Journal of General Chemistry, 2019Synthesis, structure, properties, and reactivity of verdazyls based on formazans, as well as of metalverdazyl complexes, formazanate BR2-complexes (R = F, H, Ph), and other Group 13 and 14 formazanate complexes, were considered. Special attention was focused on the study of redox-active formazanate ligands.
G. N. Lipunova +2 more
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Metal complex formazans. Part II. The reaction of copper salts with certain tetradentate formazans
Journal of the Chemical Society A: Inorganic, Physical, Theoretical, 19711,5-Di-(2-hydroxyphenyl)- and 1-(2-hydroxyphenyl)-5-(2-carboxyphenyl)-3-substituted formazans react with both cupric acetate and cuprous chloride in methanol to give square planar copper(II) complexes. In contrast, under comparable conditions, 1,5-di-(2-carboxyphenyl)-3-substituted formazans give copper(II) complexes containing two molecules of water ...
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Journal of the Royal Microscopical Society, 1967
SYNOPSISIn sections of fixed tissue, periodate‐oxidized mucosubstances that have been treated firstly with Phenylhydrazine and secondly at a pH near 9 with a diazonium salt, such as diazotized aniline or tetrazotized 3,3′‐dimethoxybenzidine, are converted into highly‐coloured derivatives which could be formazans, azo‐compounds, tetrazenes, or a mixture
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SYNOPSISIn sections of fixed tissue, periodate‐oxidized mucosubstances that have been treated firstly with Phenylhydrazine and secondly at a pH near 9 with a diazonium salt, such as diazotized aniline or tetrazotized 3,3′‐dimethoxybenzidine, are converted into highly‐coloured derivatives which could be formazans, azo‐compounds, tetrazenes, or a mixture
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Complexes with Carbazones, Thiocarbazones, and Formazans
1988Spectrophotometric studies on acetate-buffered solutions (pH 4.8) of Mn2+ ions and ligand 1, 2, or 3 at 25°C and ionic strength I=0.1(NaClO4) reveal the formation of the Mn(HL)+ complexes in each case which show the following absorption maxima λmax (in nm), the molar extinction coefficients loge e (in L·mol−1·cm−1), and the stability constants log K ...
L. J. Boucher +5 more
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