4-(4-Ethyl­phenyl­diazen­yl)phenol

The crystal structure of the title compound, C14H14N2O, determined at 100 K, shows that the mol­ecules are not planar in the solid state, in contrast to other diazene (azobenzene) derivatives. The dihedral angle between the planes of the two aromatic rings is 42.32 (7)°. The mol­ecules are linked by inter­molecular O—H⋯N hydrogen bonds, forming an infinite one-dimensional chain

application on nylon 6 and wool

The synthesis of the dye o,o'-dihydroxyazo-HMFAN and its chromium and cobalt complexes, is described. These dyes have been applied to nylon 6 and wool fabrics. Dye exhaustion has been calculated according to the absorbances of the original and residual dyes in the dyebath. The fastness to light, washing and rubbing of the dyed fabrics have been measured. The spectral characterisation of these dyes is investigated by IR and UV/Vis spectroscopic techniques and thin-layer chromatography

Synthesis of HMFAN and its chromium and cobalt complexes and their application on nylon 6 and wool

The synthesis of the. dye o,o′-dihydroxyazo-HMFAN and its chromium and cobalt complexes, is described. These dyes have been applied to nylon 6 and wool fabrics. Dye exhaustion has been calculated according to the absorbances of the original and residual dyes in the dyebath. The fastness to light, washing and rubbing of the dyed fabrics have been measured. The spectral characterisation of these dyes is investigated by IR and UV/Vis spectroscopic techniques and thin-layer chromatography

metal complexes

A series of azo-metal chelate dyes have been synthesized by coupling substituted o-nitroaniline and p-t-/s-butylphenol. The spectral characterization of the azo dyes containing o-hydroxy group and azo-metal(II) chelate [metal(II): Cu, Ni, Co] dyes by IR spectra, UV-VIS spectra, NMR spectra, elemental analysis and magnetic susceptibility techniques are reported. The stoichiometry of the azo-metal chelates was determined by the spectroscopic titration method to be 1:2 (ML2)

Solvent extraction of Fe3+ cation by diazo-coupling calix [4] arenes

The solvent extraction of Fe3+ cations from the aqueous to the organic (chloroform) phase was carried out using p-tert-butyl calix[4]arene((1) under bar), calix[4]arene((2) under bar), diazo-coupling calix[4]arenes [p-(4-n-butylphenylazo)calix[4]arene ((3) under bar), p-(4-phenylazophenylazo)calix[4]arene((4) under bar), p-(4-acetanilidazo)calix[4]arene((5) under bar), p-(N'-2-thyazol-2ylsulphanylazo)calix[4]arene((6) under bar) and p-(2-thyazolazo)calix[4]arene((8) under bar) and the derivatives of phenol [2-(5-bromo-2-pyridylazo)-5-diethylaminophenol((8) under bar) (Bromo-PADAP) and 2-hydroxy-5-methylphenylazonapthol((9) under bar) (HMPAN)]. It was found that the compounds ((1) under bar-(9) under bar) showed the highest extractability toward Fe3+ at pH 4.5-5.4 Compound (5) under bar shows strong binding ability to Fe3+ ion. Based on the method of continuous variation, calixarene 5 formed a 1:1 complex with Fe3+ ion

Crystal Structure Of 2-Hydroxy-5-T-Butylazobenzene

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