Copper calcium acetate

In the two examples of double-salt decomposition which have just been mentioned, sufficient water was yielded to cause a partial liquefaction but other cases are known where this is not so. Thus, when copper calcium acetate is heated to a temperature of 75°, although decomposition of the double salt into the two single salts occurs as represented by the equation ... 

As already mentioned, the decomposition of copper calcium acetate into the single salts and saturated solution is accompanied by a contraction, and it was therefore to be expected that increase of pressure would lower the transition point. This expectation of theory was confirmed by experiment, for van t Hoff and Spring found that although the transition point under atmospheric pressure is about 75°, decomposition of the double salt took place even at the ordinary temperature when the pressure was increased to 6000 atm. ... 

Lopez R. 1993. Improvement in measurement of spin-lattice relaxation time T in electron paramagnetic resonance application to diluted copper calcium acetate and a Fe203-doped borate glass. PhD dissertation, Universite Paul Sabatier, Toulouse, France [English translation by SK Misra]. In Biological magnetic resonance, vol. 25. Ed C Bender, L Berliner. New York Springer, 2006. 

Certain salts of divalent metals (e.g., lead and copper formate, calcium acetate) are exceptional in giving bright green fluorescences. In each case confirmatory tests must always be employed. 

AAS is used in a number of limit tests for metallic impurities, e.g. magnesium and strontium in calcium acetate palladium in carbenicillin sodium and lead in bismuth subgallate. It is also used to assay metals in a number of other preparations zinc in zinc insulin suspension and tetracosactrin zinc injection copper and iron in ascorbic acid zinc in acetylcysteine lead in bismuthsubcarbonate silver in cisplatinum lead in oxyprenolol aluminium in albumin solution and calcium, magnesium, mercury and zinc in water used for diluting haemodialysis solutions. 

The double acetate is prepared in the same general way as the double chloride but by dissolving one molecule of copper acetate with three molecules of calcium acetate. 

It exhibits a transition point at 76 to 78°. The blue double salt becomes moist in spots and changes into a green copper salt interspersed with needles of white calcium acetate. 

In tonnage production, acetaldehyde may be manufactured by (1) the direct oxidation of ethylene, requiring a catalytic solution of copper chloride plus small quantities of palladium chloride, (2) the oxidation of ethyl alcohol with sodium dichromate, and (3) the dry distillation of calcium acetate with calcium formate. 

Further studies on the supramolecular coordination chemistry of copper(II) focused on the synthesis of oligonuclear complexes by self-assembly with the pentadentate ligand (L3)2 with 2,6-pyridinyl-spacer [70]. To this end, H2L3 (4) was treated with calcium hydride and copper(II) acetate to give the metallocoronate [(Cac Cu2(L3)2 )(OAc)2] (5 Scheme 2). In the crystal, 5 is present as a dinuclear copper(II) coronate in which a calcium ion is encapsulated in the center two acetates act as counterions. 

Such a system is monovariant under a given pressure there exists a well-determined temperature for which it may exist in equilibrium this temperature is the tmnsformation point of the cupricalcium acetate under the given pressure if the temperature is less than the transformation point, the two simple salts combine and the cupricalcium acetate is formed if, on the contrary, the temperature is higher than the transformation point, the cupricalcium acetate decomposes and there is formed copper acetate and calcium acetate calcium acetate is uncolored, copper acetate green, and cupricalcium acetate blue, so that these transformations are accompanied by color changes which facilitate the study, as was first shown by Van t Hoff and Ch. van Deventer. Reicher has shown that the transformation point of cupricalcium acetate, at atmospheric pressure, is included between +76 C. and 78° C. 

The cisjtrans ratio of the cyclopropanes formed in this transformation depends to some extent on the nature of the salts and the solvent. A particularly high cisitram ratio was obtained when copper(II) acetate, calcium chloride, and ethanol were employed (no values given). Cyclopropane synthesis from active methylene compounds and nonactivated alkenes was also possible with the help of iodine and a base under phase-transfer conditions. Intra-and intermolecular reactions to give 6 and 5, respectively, have been carried out. The intramolecular reaction is nonstereospecific with respect to the C-C double bond. Although an iodo-substituted intermediate has been isolated in one case, all the details of the reaction mechanism are not yet clear. 

On the contrary, encapsulation of the larger K" " or NH4 ions should lead to the formation of metallacrown ether sandwich complexes (M+ MC= 1 2). Reaction of diethyl ketipinate H2L 13 with copper(ll) acetate in the presence of calcium nitrate affords green microcrystals 14 after crystallization from tetrahydro-furan/diethyl ether (Scheme 1). 

The cisjtrans ratio of the cyclopropanes formed in this transformation depends to some extent on the nature of the salts and the solvent. A particularly high cisjtrans ratio was obtained when copper(II) acetate, calcium chloride, and ethanol were employed (no values given).366... 

The salt obtained by evaporating the solution to dryness is called gray acetate of lime. Commercial acetic acid is obtained from the calcium acetate so prepared by distilling with concentrated hydrochloric acid in copper stills. The acid is a slightly-colored liquid which contains about 50 per cent of acetic acid. It may be further purified by redistilling over a little potassium bichromate, which oxidizes some of the impurities, and by filtering through charcoal. 

Reaction of ketipinate H2L 7 with copper(II) acetate in the presence of calcium nitrate leads to the trinudear metalla-coronate [Ca c... 

Fermented grape skins contain alcohol along with acetic acid, which is the product of the reaction of alcohol with oxygen of the air. The acetic acid reacts with copper to produce copper acetate. This substance is effective against fungi that attack grapes. Copper acetate can also be manufactured by reacting copper sulfate with calcium acetate or barium acetate. Both calcium sulfate and barium sulfate are insoluble and precipitate out copper acetate stays in solution. 

Related Reagents. Calcium Hydride Iron(III) Chloride-Sodium Hydride Lithium Aluminum Hydride Potassium Hydride Potassium Hydride-5-Butyllithium-(V,(V,(V, (V -Tetra-methylethylenediamine Potassium Hydride-Hexamethylphos-phoric Triatnide Sodium Borohydride Sodium Hydride-copper(II) Acetate-Sodium t-Pentoxide Sodium Hydride-nickel(II) Acetate-Sodium t-Pentoxide Sodium Hydride-palladium(II) Acetate-Sodium t-Pentoxide Tris(cyclopenta-dienyl)lanthanum-Sodium Hydride Lithium Hydride Sodium Telluride. 

Brophos A. See DEA-cetyl phosphate Brophos OL-2. See Oleth-2 phosphate Brophos OL-3. See Oleth-3 phosphate Brophos OL-3N. See DEA-oleth-3 phosphate Broprodifacoum. See Bromadiolone Brown M. See Direct brown 2 Brown acetate. See Calcium acetate Brown algae. See Algae, brown Brown copper oxide. See Copper oxide (ous) Brown HT... 

Cadmium calcium copper zinc chromate complex Dithiopyr Mercury chloride (ic) Phenylmercuritriethanolammonium lactate fungicide, vegetables Anisomycin Copper-ammonium acetate ... 

Sodium acetate trihydrate Sodium arsenate Sodium phosphate dibasic anhydrous Sodium stannate Tannic acid Titanium sulfate mordant, dyeing/printing fabrics Nickel sulfate Nickel sulfate hexahydrate mordant, dyeing fabrics Nickel sulfate Nickel sulfate hexahydrate mordant, dyeing leather Pyrogallol Titanium potassium oxalate mordant, dyeing textiles Albumen Aluminum diacetate Calcium acetate Chromium potassium sulfate Copper chloride (ic)... 

Predict whether or not a solid is formed when we mix the following identify any solid product by name and identify the reaction type (a) copper(ll) nitrate solution and magnesium metal (b) barium nitrate and sodium phosphate solutions (c) calcium acetate solution and aluminum metal (d) silver nitrate and sodium iodide solutions. 

Paris green, see Copper acetate arsenate(III) (1/3) Pawellite, see Calcium molybdate(VI)(2—)... 

Valentinite, see Antimony(III) oxide Verdigris, see Copper acetate hydrate Vermillion, see Mercury(II) sulflde Villiaumite, see Sodium fluoride Vitamin B3, see Calcium (+)pantothenate Washing soda, see Sodium carbonate 10-water Whitlockite, see Calcium phosphate Willemite, see Zinc silicate(4—)... 

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