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Ferrocyanides

Another important reaction supporting nonlinear behaviour is the so-called FIS system, which involves a modification of the iodate-sulfite (Landolt) system by addition of ferrocyanide ion. The Landolt system alone supports bistability in a CSTR the addition of an extra feedback chaimel leads to an oscillatory system in a flow reactor. (This is a general and powerfiil technique, exploiting a feature known as the cross-shaped diagram , that has led to the design of the majority of known solution-phase oscillatory systems in flow... [Pg.1103]

Ferric chloride solution is then added to com ert the sodium ferrocyanide to the deep blue ferric ferrocyanide (or Prussian Blue), dilute sulphuric acid being also added to dissolve any ferrous and ferric hydroxides present in the other-... [Pg.321]

Add about 0 2 g. of ferrous sulphate crystals to the first portion of the filtrate contained in a boiling-tube. An immediate dark greenish-grey precipitate of ferrous hydroxide should occur if the mixture remains clear, add a few ml. of sodium hydroxide solution. Now boil the mixture gently for a few minutes to ensure formation of the ferrocyanide, cool under the tap, add one drop of ferric chloride solution, and then acidify... [Pg.322]

Upon boiling the alkaline ferrous salt solution, some ferric ions are inevitably produced by the action of the air upon the addition of dilute siilphurio acid, thus dissolving the ferrous and ferric hydroxides, the ferrocyanides reacts with the ferric salt producing ferric ferrocyanide (Prussian blue) ... [Pg.1039]

Benedict s quantitative reagent (sugar in urine) This solution contains 18 g copper sulfate, 100 g of anhydrous sodium carbonate, 200 g of potassium citrate, 125 g of potassium thiocyanate, and 0.25 g of potassium ferrocyanide per liter 1 mL of this solution = 0.002 g sugar. [Pg.1188]

Transition metals readily form complexes, such as [Fe(CN)6], the ferrocyanide ion, Ni(CO)4, nickel tetracarbonyl, and [CuC ], the copper tetrachloride ion. MO theory applied to such species has tended to be developed independently. It is for this reason that the terms crystal field theory and ligand field theory have arisen which tend to disguise the fact that they are both aspects of MO theory. [Pg.270]

Fe(CN)g] (ferricyanide ion) symmetry elements, 85 [Fe(CN)g] (ferrocyanide ion) molecular orbitals, 270ff FlCiiN (cyanopentaacetylene) interstellar, 120... [Pg.437]

Hexa.cya.no Complexes. Ferrocyanide [13408-63 ] (hexakiscyanoferrate-(4—)), (Fe(CN) ) , is formed by reaction of iron(II) salts with excess aqueous cyanide. The reaction results in the release of 360 kJ/mol (86 kcal/mol) of heat. The thermodynamic stabiUty of the anion accounts for the success of the original method of synthesis, fusing nitrogenous animal residues (blood, horn, hides, etc) with iron and potassium carbonate. Chemical or electrolytic oxidation of the complex ion affords ferricyanide [13408-62-3] (hexakiscyanoferrate(3—)), [Fe(CN)g] , which has a formation constant that is larger by a factor of 10. However, hexakiscyanoferrate(3—) caimot be prepared by direct reaction of iron(III) and cyanide because significant amounts of iron(III) hydroxide also form. Hexacyanoferrate(4—) is quite inert and is nontoxic. In contrast, hexacyanoferrate(3—) is toxic because it is more labile and cyanide dissociates readily. Both complexes Hberate HCN upon addition of acids. [Pg.434]


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A ferrocyanide

Aluminium ammonium ferrocyanide

Aluminium ferrocyanide

Aluminium potassium ferrocyanide

Ammonium ferric ferrocyanide

Ammonium ferrocyanide

Ammonium ferrocyanide hydrate

Barium acetate ferrocyanide

Bromate-sulfite-ferrocyanide reaction

Bromate/sulfite/ferrocyanide

Bromate/sulfite/ferrocyanide oscillator

Calcium ferrocyanide

Chromium ferrocyanide

Cobalt ferrocyanide

Copper ferrocyanide

Cupric ferrocyanide

Cuprous ferrocyanide

Cyanide ferrocyanide

Electrolytes ferrocyanide reaction

Ferri/ferrocyanide

Ferri/ferrocyanide redox couple

Ferri/ferrocyanide redox system

Ferri/ferrocyanide system, electrochemical

Ferric acetates ferrocyanid

Ferric ferrocyanide

Ferric ferrocyanide, detection

Ferric-ferrocyanide complex

Ferricyanide exchange 4 ferrocyanide

Ferricyanide/ ferrocyanide

Ferricyanide/ ferrocyanide reaction

Ferricyanide/ferrocyanide couple

Ferricyanide/ferrocyanide couple redox

Ferricyanide/ferrocyanide electrode

Ferricyanide/ferrocyanide/cyanide method

Ferrocyanide and Ferricyanide

Ferrocyanide bands

Ferrocyanide blue

Ferrocyanide catalysis

Ferrocyanide compounds

Ferrocyanide ions

Ferrocyanide oxidation

Ferrocyanide oxidation kinetics

Ferrocyanide peroxide

Ferrocyanide reaction

Ferrocyanide redox

Ferrocyanide solution

Ferrocyanide spectroscopy

Ferrocyanide treatment

Ferrocyanide, current-voltage

Ferrocyanide, cyclic voltammetry

Ferrocyanide, determination

Ferrocyanide-ferricyanide redox system

Ferrocyanide-ferricyanide system

Ferrocyanide-peroxide mixtures

Ferrocyanides constitution

Ferrocyanides stability

Ferrocyanides, crystallizing

Ferrous acid ferrocyanide

Hydrogen carbonyl ferrocyanide

Hydrogen ferrocyanide

Iron ferrocyanide

Lead ferrocyanide

Lithium ferrocyanide

Magnesium ammonium ferrocyanide

Magnesium ferrocyanide

Magnesium potassium ferrocyanide

Manganese ferrocyanide

Mercuric ferrocyanide

Mercuric potassium ferrocyanide

Nickel ferrocyanide

Oxidation of ferrocyanide

Potassium Ferrocyanide Hydrate

Potassium Ferrocyanide Hydrogen Carbonate

Potassium Ferrocyanide Iodide

Potassium Ferrocyanide Nitrate

Potassium Ferrocyanide Permanganate

Potassium Ferrocyanide Sulphate

Potassium Ferrocyanide Sulphide

Potassium acetate ferrocyanide

Potassium aluminum ferrocyanide

Potassium barium ferrocyanide

Potassium borates ferrocyanide

Potassium calcium ferrocyanide

Potassium carbonyl ferrocyanide

Potassium ferrocyanid

Potassium ferrocyanide

Potassium ferrocyanide hexacyanoferrate

Potassium ferrocyanide, reaction with

Potassium zinc ferrocyanide

Prussian blue = ferric ferrocyanide

Rate constants ferrocyanide

Redox ferricyanide/ferrocyanide

SUBJECTS ferrocyanide

Silver ferrocyanide

Sodium ferrocyanide

Vanadium ferrocyanides

Zinc ferrocyanide

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