The photolysis of 1-benzyloxy-1,2,3-benzotriazole

1-Benzyloxy-1,2,3-benzotriazole was photolyzed and found to yield benzaldehyde and azobenzene as the principal products.     

The 1-alkoxy-1,2,3-benzotriazole system

The 1-alkoxy-1,2,3-benzotriazole system has been synthesized and defined on the basis of its physical and spectral properties. Bond orders and charge densities of the parent compound in the series 1-methoxy-1,2,3-benzotriazole have been calculated. All-valence-electron calculations with configuration interaction give a reasonable account of the observed absorption spectrum.     

The 5-chloro-1-alkoxy-1,2,3-benzotriazole system

The 5-chloro-1-alkoxy-1,2,3-benzotriazole system has been synthesized and characterized via its physical and chemical properties. HMO calculations predict the most reactive sites on the molecule.     

The 1-alkoxy-6-nitro-1,2,3-benzotriazole system

The 1-alkoxy-6-nitro-1,2,3-benzotriazole system has been synthesized and characterized via its physical and chemical properties. INDO/molecular orbital calculations provide a good account of the major bands in its ultraviolet absorption spectrum.     

The 1-alkoxy-4,5-dichloro-1,2,3-benzotriazole system

The 1-alkoxy-4,5-dichloro-1,2,3-benzotriazole system has been synthesized and characterized via its physical and chemical properties. INDO/S MO calculations provide a good account of the ultraviolet absorption spectrum.     

The 1-alkoxy-4-nitro-1,2,3-benzotriazole system

The 1-alkoxy-4-nitro-1,2,3-benzotriazole system was prepared using a phase transfer catalysis procedure. The physical and spectral properties of the system are reported. Molecular orbital calculations on the 1-methoxy derivative are used to explain the spectroscopic and electronic properties of the system.     

Solvent extraction of Au/III/ with 1,2,3-benzotriazole into n-butanol

Aqueous 1,2,3-benzotriazole/1,2,3-BT/ has been used for the extraction of Au/III/ from acidic medium into n-butanol. The extraction of Au/III/ was found to be better than 98% over the pH range 2.0–7.0 and an equilibration time of 2.0 min. The effect of anions and cations on the extraction coefficient has been studied. The stoichiometry of metal: reagent determined by the slope ratio method was found to be 13. Separation factor for many elements in the extraction of Au/III/ has been evaluated.     

Solvent extraction of Zn/II/ with 1,2,3-benzotriazole into n-hepatanol

A method based on solvent extraction has been developed for the radiochemical separation of Zn/II/ from other elements employing 1,2,3-benzotriazole as a complexing agent and n-heptanol as an extractant. Optimum conditions for the extraction have been established. The effect of various anions and cations on the extraction coefficient value of Zn/II/ has been studied. The stoichiometry of the metal to reagent determined by the method of substoichiometric extraction and slope-ratio method was found to be 12.     

Solvent controlled regioselective reaction of 1,2,3-benzotriazole (BtH) with pentafluorobenzene derivatives

Regioselective reaction of 1,2,3-benzotriazole (BtH) with pentafluorobenzene derivatives under base conditions was investigated and its regioselectivity strongly depends on solvent, base, and electron-withdrawing group at 4-position on the perfluorophenyl ring. Several Bt(N1)-substituted perfluorobenzenes were prepared by using this method.     

Solvent extraction of Cu/II/ with 1,2,3-benzotriazole into chloroform

1,2,3-Benzotriazole/1,2,3-BT/ has been used for the extraction of Cu/II/ into chloroform. The effect of various parameters on the extraction coefficient of Cu/II/ was evaluated. The stoichiometry of metal:reagent, determined by the method of substoichiometric extraction and slope ratio was found to be 12. Separation factor for a number of elements in the extraction of Cu/II/ has been evaluated.     

Solvent extraction of Fe/III/ with 1,2,3-benzotriazole into n-heptanol

A new and rapid method has been developed for the quantitative extraction of Fe/III/ with 1,2,3-benzotriazole /1,2,3-BT/ into n-heptanol. The extaction coefficient value of Fe/III/ between n-heptanol and an aqueous 1% solution of 1,2,3-BT was found to be better than 99% over the pH range of 7.3 to 8.0 for an equilibration time of 2.0 min. The effect of various other parameters on the extraction coefficient value of Fe/III/ such as solvents, anions and cations etc. has also been studied. The stoichiometry of the metal: reagent determined by the method of substoichiometric extraction and slope-ratio method was found to be 13. Separation factors for most of the elements studied were better than 10³.     

The photolysis of the l-cycloalkoxy-5-chloro-1,2,3-benzotriazole system

Three l-cycloalkoxy-5-chloro-1,2,3-benzotriazoles were photolyzed at 254 nm. The major photolytic pathway yielded the corresponding cyclic ketone and 4,4′-dichloroazobenzene.     

Determination of 1,2,3-benzotriazole in aqueous solutions and air by reaction-gas-liquid chromatography

A procedure is developed for the gas-chromatographic determination of 1,2,3-benzotriazole including preliminary derivatization with acetic anhydride in an aqueous solution followed by the extraction the derivative with toluene. The procedure is applied to the analysis of water samples, process solutions for treating metals, air of the working zone, and industrial emissions. Determination limits in water media are 0.01 mg/L and in the air of the working zone, 0.1 mg/m³.     

The synthesis of the 1- and 2-cycloalkyl-1,2,3-benzotriazole system

The first reported synthesis of 1- and 2-cycloalkyl-1,2,3-benzotriazoles is reported. Physical and spectral data of the system are reported. Molecular orbital calculations on the 1,2,3-benzotriazole anion show that N₁ is a more nucleophilic site than N₂.     

Modification of polyvinyl chloride with Na(K) salts of 1,2,4-triazole and 1,2,3-benzotriazole

Russian Journal of Applied Chemistry - The possibility of polyvinyl chloride modification by nucleophilic substitution of chlorine with sodium and potassium salts of 1,2,4-triazole and...