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Electrochemistry and analytical application of the tin( IV ) complex of N ‐benzoyl‐ N ‐phenylhydroxamic acid in 2‐propanol solution
Author(s) -
Helms Ina,
Pietsch Antje,
Scholz Fritz
Publication year - 1995
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140070306
Subject(s) - aqueous solution , tin , chemistry , electrochemistry , horizontal scan rate , propanol , chloride , ion , benzoyl chloride , inorganic chemistry , nuclear chemistry , medicinal chemistry , cyclic voltammetry , organic chemistry , electrode , methanol
The tin( IV ) complex of N ‐benzoyl‐ N ‐phenyl‐hydroxamic acid (HX) and chloride ions [Sn IV X 2 Cl 2 ] 0 is reduced in 2‐propanol solution via two different pathways depending on the scan rate. At scan rates higher than 20 mV/s, the reduction proceeds via [Sn II X 2 Cl 2 ] 2− and [Sn 0 X(H 2 O) 2 ] − , and at slower scan rates the reduction proceeds via [Sn II XCl 3 ] 2− and [Sn 0 Cl(H 2 O) 2 ] − . This is the first time that experiments have indicated the existence of tin 0 complexes. The studied tin IV complex can be used for the determination of tin traces in aqueous solutions. Therefore the tin IV complex is preliminarily extracted from aqueous solution and the differential pulse anodic stripping voltammograms are recorded in the organic solution after addition of 2‐propanol. The 3σ limit of detection is 4 × 10 −8 mol/L.