Ferric acetates

Reactions.—Add a few drops of alcohol to the same quantity of apetic acid, and an equal volume of concentrated sulphuric acid. Warm gently and notice the fruity smell of ethyl acetate. Neutralise a few drops of acetic acid by adding e.xcess of ammonia and boiling until neutral. Let cool and add a drop of ferric chloride. The red colour of ferric acetate is produced On boiling, basic ferric acetate is precipitated. 

Feiri-. ferric, ferri-, iron(III). -acetat, n. ferric acetate, iron(IIl) acetate, -ammonsulfat, n. ammonium ferric sulfate, -bromid, n. ferric bromide, iron(III) bromide, -chlorid, n. ferric chloride, iron(lll) chloride, -chlor-wasserstoff, -chlorwasserstoffsMure, /. fer-richloric acid. -cyan, n. ferricyanogen. -cyaneisen, n. ferrous ferricyanide (Turn-bull s blue), -cyanid, n. ferric cyanide, iron(III) cyanide ferricyanide. 

For Examples 5, 8, 12, 21, and 28, all first order, the logL values for Steps 1, 4, and 6 are too large. With Examples 8 and 12 one can obtain reasonable logL values by postulating (as was done in connection with similar examples listed in Table V) that the gas molecule does not lose all of its entropy upon adsorption. For Example 28 Kuriacose and Jewur (56) postulated a bimolecular surface mechanism, that is. Step 4. The L value for that step is very large the authors claimed that an intermediate is ferric acetate. If this is correct, one would indeed expect the L calculation to indicate that the reaction is more complex than any of our models. For... 

It does not seem probable that in this recipe the blood of the dove is red lead or cinnabar as interpreted in other connections by Yon Lippmann, for neither of these substances would be held in solution by vinegar. It is more probable that it is some vegetable red dye stuff. The value of the ferric acetate produced by the action of vinegar upon the Sinopian earth was perhaps that of fixing or rendering more permanent the color absorbed. Alkanna is the red dye from the roots of anchusa tinctoria. 

Ferric orthoarsenite cannot be prepared directly from ferric hydroxide and arsenious oxide.4 The brown product obtained by shaking freshly precipitated ferric hydroxide with an aqueous solution of arsenious oxide has been described 5 as a basic ferric arsenite of composition 4Fe203.As203.5H20. A similar substance is obtained by adding aqueous arsenious oxide or sodium arsenite to ferric acetate solution. If ferric chloride, sulphate or nitrate is used, the ferric salt is not completely precipitated. The product is oxidised in moist air, and decomposes when heated. It is very doubtful whether this is a chemical individual, however, for it has been shown that the removal of arsenious oxide from the solution by the ferric hydroxide is due to adsorption, the amount removed depending upon the conditions and the age of the adsorbent. This subject is discussed more fully on p. 154. 

The Ruff degradation,67 involving interaction of a salt of an aldonic acid, ferric acetate, and hydrogen peroxide, was employed in the synthesis of 5-deoxy-L-arabinose218 and 5-deoxy-L-Iyxose.219... 

FeCl3, red coloration, which on boiling yields brownish precipitate of basic ferric acetate. The red colour is destroyed by HC1, but not by HgCla. 

The thermodynamic stability of the binuclear site has been demonstrated by the spontaneous assembly of [Fe20(02CR)2L2] (13) from ferric salts in the presence of water, an alkyl carboxylate salt, and a tridentate nitrogen donor ligand L that can cap an octahedral face on iron (8). Suitable ligands include tris(pyrazolyl)borates and 1,4,7-triazacyclononanes. Structure (13) is in essence a portion of the basic ferric acetate structure. The complexes are excellent physical and structural models of the diiron sites and model some aspects of reactivity including redox activity and interconversion of the oxo and hydroxo bridge. 

Fe(C2H302)3 (aq.). Thomsen15 measured the heat of reaction of aqueous ferric sulfate with aqueous barium acetate to be 20.21. Ber-thelot5 measured the heat of reaction of aqueous ferric acetate with aqueous potassium hydroxide, and the reciprocal heats of mixing involving Fe, C2H302 , H% and Cl-. Data on the heat of dilution of aqueous ferric acetate were reported by Berthelot5... 

Two useful preparations of lower sugars by degradation of aldonic acids are discussed in the following Chapter. These are the traditional oxidation of salts of aldonic acids with hydrogen peroxide in the presence of ferric acetate (Ruff degradation) and the related oxidation of aldonic acids by hypochlorite, which was developed by Whistler and Schweiger.79... 

Other Papers.—Various iron species prepared by the vacuum pyrrolysis of acetyl-ferrocene-furfural resins at 400°C have been studied by Mossbauer spectroscopy. These consist of an amorphous glass-like carbon matrix containing free iron atoms, Fe+ ions, iron clusters, superparamagnetic iron, and ferromagnetic iron.333 The effect of pressure of up to 50kbar on the absorption spectra of five iron(m), two iron(n) and one mixed valence compound has been studied. In six of the compounds, but not in basic ferric acetate or soluble Prussian Blue, the observed pressure-induced bands were assigned to d-d transitions of converted iron(n) for the ferric compounds and to spin-forbidden d-d bands for the ferrous compounds. The charge-transfer band from iron(n) to iron(m) in soluble Prussian Blue showed a blue shift at pressures up to 7.2 kbar.334... 

Ethyl nitrate Iron-, ferric acetate, bisulfate, chloride, permanganate, sulfate... 

When ferric acetate solution is exposed to hydrogen gas at 850° C. and under 230 atmospheres5 pressure, ferric oxide is precipitated as an anhydrous red mass, insoluble in water but soluble in hydrochloric acid. At 400° C. and under a pressure of 420 atmospheres, metallic iron is obtained.1... 

Ferric arsenite, 4Fe203.As203.5H20, may be prepared by shaking freshly precipitated ferric hydroxide with an aqueous solution of arsenious oxide, or by adding sodium arsenite (or an aqueous solution of arsenious oxide) to ferric acetate. It is brown in colour, and oxidised by the air when moist.2... 

Cyanogen compounds, cf. table of organic compounds Ferric acetate, basic Fe(0H)(C4H30j4 190.95 brn., amor. 1.806 (A)... 

It maj- also be separated from solutions of uranium salts bj the addition of a little cerium salt and precipitation with aqueous hydrofluoric acid, or with oxalic acid or bj adding a small quantity of thorium nitrate and precipitating with t-nitrobenzoic acid. It may also be absorbed bj- charcoal,iDasic ferric acetate, and by various oxides, sulphides, sulphates, and gelatinous silica. In the case of charcoal the uranium X is completely removed from a solution of a... 

The decrease in the carbon content of aldose sugars may also be accomplished by another series of reactions. When the aldose is oxidized with mild oxidizing agents, the product is a mono-basic acid, containing the same number of carbon atoms. When this hydroxy mono-basic acid is treated with hydrogen peroxide, in the presence of ferric acetate, a second oxidation takes place, by which the secondary... 

IV). Calcium n-altronate may be converted not only to D-altrose, but it may serve also as a source of n-ribose if the cost of preparing ribose by other methods should make this desirable. The degradation of calcium n-altronate to n-ribose by means of hydrogen peroxide in the presence of ferric acetate as a catalyst has been described by Hudson and Richtmyer. 

The successful degradation of o[ -D-glucosaccharinic acid to a 1-deoxy-pentulose has apparently not been recorded. Experiments in the author s laboratory have indicated that the oxidation of calcium a -D-glucosac-charinate with hydrogen peroxide and ferric acetate (the Ruff degradation) proceeds normally to yield a reducing product. However, no crystalline derivative of the expected deoxypentulose has been obtained as yet. 

Catechu-tannic Acid.—This body, also known as catechin-red, is obtained by extracting catechu with cold water, or by heating catechin with water to 110°. It precipitates gelatine but not tartar-emetic, and gives a green coloration with ferric acetate. 

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