Studies on Analytical Methods of Manganese by Sodium Bismuthate. II-III. II. Colorimetric Determination of Chromium, Manganese and Chromium Simulta neously.

Cyclopentadienyl mesityl complexes of chromium(II) and chromium(III).

Chromium(III) mesityl complexes were synthesized by protonolysis of chromocene with 1,3-diisopropylimidazolium chloride or DBU hydrochloride, salt metathesis with MesMgBr, and single electron oxidation with iodine.

Dilead(II) chromium(III) hepta­fluoride

Single crystals of the title compound, Pb(2)CrF(7), were obtained by solid-state reaction. The monoclinic structure is isotypic with Pb(2)RhF(7) and is built up of CrF(6) (3-) octa-hedra isolated from each other, inserted in a fluorite-related matrix of PbF(6) distorted octa-hedra, and PbF(8) square anti-prisms sharing edges and corners. The seventh F atom is 'independent', connected only to th...

Simultaneous Determination of Iron(III), Iron(II), and Manganese(II) in Environmental Samples by Ion Chromatography

A chromatographic method was developed for simultaneous determination of Fe(III), Fe(II), Mn(II), and other transition metals. A high-performance polymer-coated silica-based cation exchange column was used for the separation of metals from hydrochloric acid-extracted environmental samples. After separation, the metals were mixed with PAR [4-(2-pyridylazo)resorcinol] and passed through a superco...

Flow-injection chemiluminescence determination of manganese(II) in natural water with solid sodium bismuthate as an oxidant.

Influence of Nitrogen Bases on Epoxidation of Cyclooctene with Sodium Periodate Catalysed by Manganese(III) Porphyrins

Effects of imidazoles and substituted pyridines and pure s-donors on the oxidation of cyclooctene with NaIO4 by 5,10,15,20-tetraphenylporphyrinato-manganese(III) acetate, Mn(TPP)OAc, and 5,10,15,20-Tetramesitylporphyrinato-manganese(III) acetate, Mn(TMP)OAc, catalysts in CH2Cl2-H2O solvent are studied. Coordination of the nitrogen donors to the Mn...