Cupric acetate hydrate

The crystal structure of cupric acetate hydrate, Cu2(CH COO)4 2H20, shows that the pairs of copper atoms are only 2.64 A apart.50 This distance corresponds to a bond with n = 0.33. The substance has anomalous magnetic properties that have been interpreted as representing a weak bond.51 Similar bonds have been reported for several crystals containing Ni, Pd, and other metal atoms. 

A basic copper chlorate is formed when soln. of potassium chlorate acidified with sulphuric acid are electrolyzed with an alternating current between copper electrodes (L. Rossi) 83 when the hydrate is heated above 100° (A. Wachter) when a soln. of copper chlorate be mixed with pieces of marble or urea, and heated in a sealed tube to 130° (L. Bourgeois) when the hydroxides of the alkalies or alkaline earths act on cupric chlorate soln., or copper hydroxide acts on soln. of potassium chlorate (A. Brochet) when hydrated cupric oxide or cupric hydroxide acts on cupric chlorate soln. (P. Sabatier) or when potassium chlorate acts on cupric acetate soln. (A. Casselmann), basic cupric chlorate is obtained. The basic chlorate forms bluish-green monoclinic prisms of sp. gr. 3 55 and composition 4Cu0.C1205.3H20, that is, Cu(C103)2.3Cu(0H)2, which A. Werner considers to be hexahydroxyl cupric chlorate ... 

Copper(II) acetate and, very probably, other copper salts of carboxylic acids are dimeric (Fig. 11-1). In the acetate hydrate, the two cupric ions have been shown to be linked by four acetate bridges. The... 

Catalyst, alumina, 34, 79, 35, 73 ammonium acetate, 31, 25, 27 boron tnfluonde etherate, 38, 26 copper chromite, 31, 32, 36, 12 cupric acetate monohydrate, 38, 14 cuprous oxide silver oxide, 36, 36, 37 ferric nitrate, hydrated, 31, 53 phosphoric acid, 38, 25 piperidine, 31, 35 piperidine acetate, 31, 57 Raney nickel, 36, 21, 38, 22 sulfuric acid, 34, 26 Catechol, 33, 74 Cetylmalonic acid, 34, 16 Cetylmalonic ester, 34,13 Chlorination, by sulfuryl chloride, 33, 45, 37, 8... 

Ciystals Cj of hydrated cupric acetate Cu(CjH30j) Hj0 4 . Crystals C3 of hydrated calcic acetate Ca(C2H303) H30 6 . Crystals D of cupri-calcic acetate CuCa(CJ3,02)3 6H30. The temperature 76 is the temperature of a quintuple point 3 in the neighborhood of this point the five curves of transformation tensions are arranged as shown in Fig. 52. 

To a solution of 612 mg (2.1 mmol) of androst-4-ene-3/5,17/ -diol in 15mL of CH,OH arc added 7g (0.14 mol) of hydrazine hydrate and 1.9 mg (0.01 mmol) of cupric acetate. The reaction mixture is stirred at r.t. for 7 h in an atmosphere of dry air, poured into dil HCI, then exiracted with F.t,0. The combined Ei,0 extract is washed with H,0. dried over Na,S04 and evaporated to give a crystalline residue yield 550 mg (90%). Recrystallization from EtOH gives pure material mp 163-164 C. 

Thiol protection. The phthalimidomethyl group, introduced to thiols under mild reaction conditions using this reagent, is removed by treatment with hydrazine hydrate followed by mercuric or cupric acetate. 

The scope of the catalytic potential of the cerium(III) ion was intimated by Pratt (1962) in an investigation of the addition of aromatic amines to quinones. Use of hydrated cerous chloride in place of cupric acetate as an oxygen carrier in the oxidation of byproduct hydroquinone resulted in improved yields and easier product separation from metal complexes. 

Preparation by decarboxylation of 2-(4-hydroxy-3-methoxy-benzoyl)benzoic acid in the presence of cupric acetate mono-hydrate in quinoline at 250-254° for 35 min (72%) [690],... 

C 2-Bromo-4-methylbenzaldehyde A 3-1. three-necked flask is equipped with an efficient stirrer, a dropping funnel (Note 2), and a thermometer. The aqueous 10% formaldoxime prepared in step A is placed in the flask, and to it are added 6 5 g (0.026 mole) of hydrated cupric sulfate, 1.0 g. (0 0079 mole) of sodium sulfite, and a solution of 160 g of hydrated sodium acetate in 180 ml. of water The solution is maintained at 10-15° by means of a cold-water bath and stirred vigorously. The neutral diazonium salt solution prepared in step B is slowly introduced below the surface of the formaldoxime solution (Notes 3 and 4). After the addition of the diazonium salt solution is complete, the stirring is continued for an additional hour and then the mixture is treated with 230 ml. of concentrated hydrochloric acid. The stirrer and the dropping funnel are replaced by stoppers, and the mixture is gently heated under reflux for 2 hours The flask is set up for steam distillation, and the reaction product is steam-distilled. The distillate is saturated with sodium chloride, extracted with three 150-ml portions of ether, and the ethereal extracts are washed successively with three 20-ml portions of a saturated sodium chloride solution, three 20-ml. portions of an aqueous 10% sodium bicarbonate solution, and again with three 20-ml portions of a saturated sodium chloride solution. 

Its expl props were not investigated (Refs 2 5) Cupric Perchlorates. No anhyd salt was prepd, but its hepta-, hex a-, tetra- and di-hydrates are known (Ref 5). The most common seems to be hexa-hydrate, Cu(CI0 ).6H20. It was first prepd in 1831 by Serullas by heating CuO with perchloric acid. Portillo Alberola prepd it in 1930 (Ref 3) by treating Cu carbonate with 30% perchloric acid. The ppt, W ashed with ale ether and dried in vacuum over PjOg, was It blue in color, mp 82° and decomposed at 120° (See also Refs 4 5) According to Ellern (Ref 6), a match can be produced which uses Cu (or Sr) perchlorate dissolved in triethanolamine and combined with cellulose acetate - with the regular matchheads affixed... 

Salts of Oxo Adds. The most familiar cupric compound is the blue hydrated sulfate, CuS04-5H20, which contains four water molecules in the plane with O atoms of S04 groups occupying the axial positions, and the fifth water molecule H-bonded in the lattice. It may be dehydrated to the virtually white anhydrous substance. The hydrated nitrate cannot be fully dehydrated without decomposition. The anhydrous nitrate is prepared by dissolving the metal in a solution of N204 in ethyl acetate and crystallizing the salt... 

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