Spectral and cyclic voltammetric studies on some intramolecularly hydrogen bonded arylhydrazones: Crystal and molecular structure of 2-(2-(3-nitrophenyl)hydrazono)-5,5-dimethylcyclohexane-1,3-dione

Synthesis, spectral and RAHB studies on some arylhydrazones of β-diketones: crystal and molecular structures of 2-(2-(3-pyridyl)hydrazono)-5,5-dimethylcyclohexane-1,3-dione and 2-(2-(2-methoxyphenyl)hydrazono)-5,5-dimethylcyclohexane-1,3-dione

“…There are two low intense signals in the higher frequency region of 14.79 and 15.53 ppm, respectively, due to intramolecularly hydrogen bonded NH protons. Among the two the one which is highly deshielded is assigned to dimedone fragment as reported earlier [19]. In all the cases the residual solvent signal at 1.5 ppm corresponding to water dissolved in CDCl of 117.5-152.6 ppm.…”

“…The preparation and the spectral analysis of 6 was reported already [19] and in view of its important biological application [11] the single crystal X-ray structural analysis alone is reported in this paper. Compounds 3 and 5 were purified by column chromatography using benzene as eluent.…”

Structure elucidation of the dye Acid Red 131: complete 1H, 13C and 15N NMR data assignment

“…The bands at 1596, 1616 and 1675 cm −1 can be attributed to the two ν(C O) and to the ν(C N) of the molecule. [12] The UV-visible absorption spectrum of Acid Red 131 in DMSO (not shown) displays two maxima of similar intensity at 536.0 and 564.4 nm, whereas the fluorescence emission maximum was found at 595.6 nm.…”

Crystal structure of 2-((dimethylamino)methylene)-5,5-Dimethylcyclohexane-1,3-dione, C11H17NO2

“…The inhibitory e ect of these products are a consequence of their aptitude to make complexes with Fe++ in the vigorous location of the enzyme. Cyclohexane-1,3-dione well known as ancestors of impending anti-diabetic drugs [7]. In continuation of our synthesis of biologically active heterocyclic compounds [8][9][10][11][12], we report herein the results of the synthesis and reactions of 5,5-dimethylcyclohexane-1,3-dione with dimethylformamidedimethylacetal (DMF-DMA).…”