Acid-Base Titrations in Nonaqueous Solvents

Chromatography and Analogous Differential Migration Methods

Treatment of iron(II) chloride or iron(II) bromide with 2 equiv of sodium quinaldate (qn = quinaldate or C10H6NO2−) yields the coordinatively unsaturated mononuclear iron(II) quinaldate complexes Na[FeII(qn)2Cl]·DMF and Na[FeII(qn)2Br]·DMF (DMF = N,N-dimethylformamide), respectively. When a similar synthesis is carried out using iron(II) triflate, a solvent-derived linear triiron(II) complex, [FeII3(qn)6(DMF)2], with two five-coordinate iron(II) centers and a single six-coordinate iron(II) center is obtained. Each of these species has been characterized using X-ray diffraction. The vibrational features of these complexes are consistent with the observed solid-state structures. Each of these compounds exhibits an iron(II)-to-quinaldate (π*) charge-transfer band between 520 and 550 nm. These metal-to-ligand charge-transfer bands are sensitive to substitution of the quinaldates as well as alteration of the first coordination sphere ligands. However, the 1H NMR spectra of these paramagnetic high-spin iron(II)...

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Synthesis and Characterization of Iron(II) Quinaldate Complexes

Spectrophotometric studies on the nature of iron complexes with pyridine- and quinoline-carboxylic acids

Polarographic reduction of 1,5-diaza-4,8-dihydroxy-10-N-butyl penanthrene 2,6-dicarboxylic acid (ICI 74,917); simultaneous reduction of two electroactive centres

Etude pH-metrique de l'acide quinaldique. Determination de la constante du couple acide/base (QH/Q−1), Ka = 1,2 · 10−5.

Étude analytique de l'acide quinaldique I

This paper completes the preceding one by a colorimetric study of iron quinaldate. The dissociation constant of this compound has been determined by calculation based on colorimetric data.

Étude analytique de l'acide quinaldique III. Étude d'un complexe interne de l'acide quinaldique: le quinaldate de fer

Continuing our work on quinaldic acid, we present in this paper a polarographic study of quinaldic acid in order to examine its reduction equations and in view of its polarographic determination.

Liliane Epars

Papers

Étude analytique de l'acide quinaldique I

Étude analytique de l'acide quinaldique III. Étude d'un complexe interne de l'acide quinaldique: le quinaldate de fer

Étude analytique de l'acide quinaldique II. Étude polarographique