Zinc acetate.dihydrate

A PEIT of 50/50 (molar ratio) composition is synthesized by a two-step reaction sequence as follows. In the first step, 97.10 g (0.5 mol) dimethyl terephthalate (DMT), 97.10 g (0.5 mol) dimethyl isophthalate (DMI), 136.55 g (2.2 mol) 1,2-ethanediol, and zinc acetate dihydrate ester interchange catalyst (2.7 x 10 4% mass of the total amount of DMI and DMT mixture) are weighed into a threenecked flask fitted with a mechanical stirrer, a nitrogen inlet, and a condenser. The medium is stirred for 2.0-2.5 h at 180-210°C under nitrogen. Ninety-two percent of the theoretical amount of methanol is removed by distillation. In the second step, antimony acetate polycondensation catalyst and trimethyl phosphate thermal stabilizer (9.9 x 10-4 and 1.5 x 10 3% mass of the total amount of DMI... 

Other Cu(II) Complexes Cu(II)-Doped Zinc Acetate Dihydrate... 

Table 13. Magnetic parameters of Cu(II)-doped zinc acetate dihydrate (data from Atherton and Horsewill215) Aj and a in MHz)...

Recently, the in situ thermal decomposition monitoring capability of TOF-SIMS has been reported, in which zinc acetate dihydrate, Zn(CH3COO)2 2H20 (77), decomposed to form ZnO nanoparticles. The only organozinc ions detected at room temperature were [ZnCH3]+ (in the positive-ion mode) and [OZnCHs] (in the negative-ion mode), both of relatively low abundances. 

Di-0-dichloroacetyl-l-0-benzyloxycarbonyl-(4,6-0-ethylidene)-p-D-glucopyranose Palladium on carbon 4 -Demethyl-epi-podophyllotoxin Zinc acetate dihydrate Boron trifluoride etherate Trimethylsilyl trifluoromethane sulfonate Celite/basic alumina column... 

Synthesis. Ammonium sulfite monohydrate, 4,4 -bipyridyl, 1,4-diazabicyclo[2.2.2]octane (DABCO), neodymium(III) nitrate hexahy-drate (Aldrich), 1,10-phenanthroline, ethylenediamine (SD Fine, India), and zinc acetate dihydrate (Qualigens, India) of high purity were used for the synthesis. 

Synthesis of ZnO Nanorods. In order to carry out the growth study in the absence of any capping agent, ZnO nanorods were prepared by the reaction of zinc acetate dihydrate (Zn(CH3-C00)2 2H20) and sodium hydroxide in ethanol at 100 °C under solvothermal conditions. The reaction was stopped at different times (I, 2, 3, 6, 12, 18, and 24 h), and the products were analyzed by TEM and SAXS. In a typical synthesis, Zn(CH3-... 

We have extended the method of solubilization of SWNTs to oxide nanorods. We prepared ZnO nanorods by the solvothermal decomposition of 250 mg (0.911 mmol) of zinc acetate dihydrate in the presence of 6 mL (0.102 mmol) of ethylene-... 

Zinc Acetate Solution (10%) Dissolve 120 g of zinc acetate dihydrate, Zn HsC E O, in 880 mL of water, and filter through Whatman No. 2V or equivalent filter paper before use. 

Ultraviolet Stabilizers. Four commercial UV stabilizers and zinc acetate dihydrate (U.S.P. grade) were added to various films during their preparation. Two were of the hydroxybenzotriazole type, one a hydroxybenzophenone, and another a hindered-amine type (Table I). 

Three 8-mil-thick cellulose acetate films containing (a) no stabilizer, (b) 0.5% UV-1A (hydroxybenzotriazole type), and (c) 1.0% UV-4 (zinc acetate dihydrate) were inserted into a Cary 17D UV/VIS/NIR Recording Spectrophotometer and their absorption/transmission curves run in the region of 250-500 nm. The film containing no stabilizer was run against air as the standard while films containing stabilizers were run against the unstabilized film as the standard. 

It was not possible to evaluate insoluble pigments such as zinc oxide for their effectiveness as UV stabilizers in the cellulose acetate films because the centrifugation necessary to remove air bubbles prior to film casting caused such insoluble materials to be distributed unevenly in the casting solution. Therefore, a soluble experimental stabilizer, zinc acetate dihydrate (UV-4) was chosen for this study. Although previous research... 

The hindered-amine type stabilizer was ineffective, and the zinc acetate dihydrate moderately effective, in protecting the wool fabrics. Further study is needed to determine the mechanisms by which the latter compound imparts photostabilization. 

Zinc acetate (1 %). Dissolve 1 g zinc acetate dihydrate, Zn(CH3COO)2.2H20, in water and dilute to 100 ml. 

ZnC4H10O6 zinc acetate dihydrate 5970-45-6 25.00 1.7350 1 5117 ZrBr4 zirconium bromide 13777-25-8 25.00 3.9800 1... 

LD50 (IP, mouse) 0.057g/kg Zinc acetate dihydrate ... 

Cadmium acetate-Zinc acetate. The catalyst, prepared by heating a mixture of 2.5 g. each of cadmium acetate dihydrate and zinc acetate dihydrate to remove the water of hydration, promotes addition of primary aliphatic amines to acetylene to give ethylidenimines. Thus ethylamine, heated with acetylene and catalyst in an autoclave at 120-140° for 29 hrs., afforded N-ethylethylidenimine (1). Catalyzed reaction... 

A decision is to be made as to the least expensive source of zinc. One source of zinc is zinc sulfate, ZnS04, and another is zinc acetate dihydrate, Zn(CH3COO)2 2H2O. These two sources of zinc can be purchased at the same price per kilogram of compound. Which is the most economical source of zinc and by how much ... 

Full processes for the preparation of aromatic isocyanates by DMC were also patented. In particular recently it was published a patent which claims an integrated process for the production of aromatic isocyanates without phosgene. In the examples the various phases of the process are repotted, starting form the reaction of the amine (TDA) with DMC to carbamate with zinc acetate dihydrate as catalyst, following a passivation treatment of the urethane catalytic residues and then pyrolysis of urethane in gas phase. 

For room-temperature reaction conditions without the addition of extra base, an appropriate metal salt (often the acetate) is chosen to drive the reaction and concentrated solutions are used. Terephthalic acid (254 mg, 1.53 mmol, Aldrich) is dissolved in 20 mL of DMF in a 50-mL Erlenmeyer flask, and zinc acetate dihydrate (718 mg, 3.27 mmol, Alfa Aesar) is dissolved in a separate container in 20 mL of DMF via vigorous shaking and sonication. The zinc salt solution is added dropwise to the terephthalic acid solution flask over 15 min while stirring with a Teflon-coated magnetic stirring bar. A white precipitate is formed almost immediately, and the solution is stirred for 45 min. Powder X-ray diffraction is used to confirm phase pure MOF-5. This procedure has successfully been scaled up to 3.37 g. 

The checkers used 0.223 g of 1,3,5-benzenetribenzoic acid, 0.894g of zinc acetate dihydrate, and 17 mL of DEF placed in a capped 25 mL vial. Trials with uncapped containers failed. The white product obtained was worked up using Schlenk techniques. 

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