4-Methoxybenzohydroxamic acid

C14H12CINO3 iV-w-Chlorophenyl-/2- methoxybenzohydroxamic acid Extiaction-photometric Pd 131... 

The sensitivity of the method can be increased by addition of gelatine (e = 7.5-10 ) [51]. Hafnium has been extracted with CHCI3 from HCl medium as the chelate complex with N-tolyl-p-methoxybenzohydroxamic acid, and the XO added has given a mixed-ligand complex (e = 8.4-10 ) [52]. In a similar way Zr was determined with the use of tri-n-butylacetohydroxamic acid [53]. 

Gupta VK, Tandon SG. 1973. N-Arylhydroxamic acids as reagents for vanadium (V). Spectrophotometric determination of vanadium (V) with N-M-Tolyl-p-methoxybenzohydroxamic acid. Anal Chim Acta 66 39- 48. 

Formation constants of 3d metal ions with A-m-tolyl-p-substituted benzohydroxamic acids and of rare earths with thenoylhydroxamic acid have been determined. Formation constants of proton and metal complexes of iV-phenyl-2-thenoyl- and A-p-tolyl-2-thenoyl-hydroxamic acids have also been determined. In addition, study has been made of the mixed ligand complexes involving nicotine- and isonicotino-hydroxamic acids. A method of extraction and spectrophotometric determination of vanadium with chlorophenylmethylbenzohydroxamic acid has also been published. It may be mentioned that hydroxamic acids (in particular, the A-phenylbenzohydroxamic acid) have been widely used as analytical reagents for metal ions. Solvent extraction of titanium by benzo- or salicyl-hydroxamic acid in the presence of trioctylamine in the form of coloured complexes has been reported. A-w-Tolyl-p-methoxybenzohydroxamic acid has been used for extraction and spectrophotometric determination of Mo and W from hydrochloric acid media containing thiocyanate. 

JV-1 -Naphthyl-/7-methoxybenzohydroxamic acid, see H-00268 1-Naphthylmethylamine, N-00051 JV-1 -Naphthyl-o-methylbenzohydroxamic acid, w H-00290... 

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