نتایج جستجو برای: acetylacetone

تعداد نتایج: 451  

Journal: :Bulletin of the Chemical Society of Japan 1965

Journal: :Dalton transactions 2012
Yanfang Li Yang Liu Ming Zhou

Biscyclometalated iridium(III) complexes with an ancillary acetylacetone ligand, Ir(L)(2)(acac), (L = 2-(benzo[b]thiophen-2-yl)pyridine (btp), 1-phenylisoquinoline (piq), 2-phenylbenzothiazole (bt), 2-phenylpyridine (ppy), acac = deprotonated acetylacetone), demonstrate spectroscopic changes in their UV-Vis absorption and luminescent emission under acidic conditions. Such changes were found to ...

2013
Noha N. Atia Ashraf M. Mahmoud Salwa R. El-Shabouri Wesam M. El-Koussi

Two new, sensitive, and selective spectrofluorometric methods were developed for the determination of gemifloxacin mesylate (GFX) in tablets and spiked human plasma. Method A was based on measurement of the enhanced fluorescence spectral behaviour of GFX in a sodium dodecyl sulphate (SDS) micellar system. In aqueous solution of acetate buffer pH 5.5, the fluorescence intensity of GFX was greatl...

Journal: :Acta chimica Slovenica 2015
Rasoul Vafazadeh Naime Hasanzade Mohammad Mehdi Heidari Anthony C Willis

Two copper(II) complexes, cluster 1, and mononuclear 2, have been synthesized by reacting acetylacetone and benzohydrazide (1:1 ratio for 1 and 1:2 ratio for 2) with CuCl(2) in a methanol solution. In 2, which is a new complex, the ligand acts as a tetradentate which binds the metal ion via two amide-O atoms and two imine-N atoms providing an N(2)O(2) square-planar around the copper(II) ion. Th...

Journal: :Clinical chemistry 1971
F G Soloni

This rapid, simplified assay for serum triglycerides is based on the use of a more effective solvent extraction procedure, ethoxide transesterification, and color development with acetylacetone. No phospholipid adsorption step is necessary. The procedure requires less than 0.2 ml of serum, no expensive or elaborate apparatus, and 5 to 10 values can be obtained per hour, with better precision th...

Journal: :Crystal Growth & Design 2021

The ditopic molecule 3-(1,3,5-trimethyl-4-1H-pyrazolyl)acetylacetone (HacacMePz) combines an acetylacetone group suitable for deprotonation and O,O? coordination to a Pearson hard cation with softer N-donor site. Both binding modes were employed individually: the pyrazolyl moiety was coordinated ZnII, HgII, AgI, trivalent iron tris-chelating complex [Fe(acacMePz)3] isolated. CuII derivative sho...

Journal: :Dalton Transactions 2021

(N(nBu)4)[MIIIL(acac)2], M = Y, Gd, Tb and Dy, have been constructed by combination of two O donor ligands, bidentate acetylacetone tetradentate p-tert-butylcalix[4]arene.

Journal: :Clinical chemistry 1980
J M Meola T G Rosano T A Swift

We describe an assay for ethylene glycol in serum, which is based on the Hantzsch condensation reaction. Ethylene glycol is dehydrogenated by sodium periodate to form two molecules of formaldehyde, which is then combined with ammonium ion and acetylacetone to form a fluorescent diacetyllutidine derivative. The detection limit of this method is 50 mg/L. The procedure is sensitive, requires only ...

2013
P. HRNČIAR E. POLÁKOVA

Reactions of 2-X-2-(Y-phenyl)-l,3-indandiones (X = C1, Br; Y = H, p-N02, /?-CH30, m-CH30) with anions of acetylacetone, ethyl malonate nitromethane, and 2-nitropropane were carried out. It was found that the starting indandione was converted during the reaction into the anion of 2-(Y-phenyl)-l,3-indandione (/) and bis-2-(Y-phenyl)-l,3-indandione (II). The ratio of the products / and II was depe...

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