Acetate salts

Copper acetate, ferrous acetate, silver acetate [563-63-3] basic aluminum acetate, nickel acetate [373-02-4] cobalt acetate, and other acetate salts have been reported to furnish anhydride when heated. In principle, these acetates could be obtained from low concentration acetic acid. CompHcations of soHds processing and the scarcity of knowledge about these thermolyses make industrial development of this process expensive. In the eady 1930s, Soviet investigators discovered the reaction of dinitrogen tetroxide [10544-72-6] and sodium acetate [127-09-3] to form anhydride ... 

Acetates. Anhydrous iron(II) acetate [3094-87-9J, Ee(C2H202)2, can be prepared by dissolving iron scraps or turnings in anhydrous acetic acid ( 2% acetic anhydride) under an inert atmosphere. It is a colorless compound that can be recrystaUized from water to afford hydrated species. Iron(II) acetate is used in the preparation of dark shades of inks (qv) and dyes and is used as a mordant in dyeing (see Dyes and dye intermediates). An iron acetate salt [2140-52-5] that is a mixture of indefinite proportions of iron(II) and iron(III) can be obtained by concentration of the black Hquors obtained by dissolution of scrap iron in acetic acid. It is used as a catalyst of acetylation and carbonylation reactions. 

Amine salts, especially acetate salts prepared by neutralization of a fatty amine with acetic acid, are useflil as flotation agents (collectors), corrosion inhibitors, and lubricants (3,8). Amine acetates are commercially available from a number of suppHers Akzo Chemicals Inc. (Armac) (73) Henkel Corporation (formerly General Mills) (Alamac) (74) Jetco Chemicals Inc. (The Procter Gamble Company) (fet Amine) (75) Sherex (Adogen) (76) and Tom ah Products (Exxon Chemical Company) (Tomah) (77). 

Other materials based on EDA have also been suggested as fungicides. The most important of the imida2oline type (162) is 2-heptadecyl-2-imida2oline (163), prepared from EDA and stearic acid [57-11-4]. It is used as the acetate salt for control of apple scab and cherry leaf spot. A 2 1 EDA—copper sulfate complex has been suggested for control of aquatic fungi (164). 

Ethanol-water Minimum-hoiling azeotrope Ethylene glycol, acetate salts for salt process Alternative to azeotropic distillation, pressure swing distillation... 

The crude base is purified by converting 2g of base in toluene (3.3mL) into the acetate salt by heating at 65-70 with 0.46g of AcOH and the crystals are collected and dried (0.96g from two crops m 141-143 ). The acetate salt is dissolved in warm H2O, basified with aqueous NaOH and extracted with C6H6. The dried extract (MgS04) is evaporated in vacuum leaving a viscous oil which crystallises and can be distd. [Gottstein and Cheney J Org Chem 30 2072 1965.] The picrate has m 234-236 (from aq MeOH), and the formate has m 147-148° (from heptane). 

Formamidine acetate [3473-63-0] M 104.1, m 159-161"(dec), 164 (dec), pK j( 12. Unlike the hydrochloride, the acetate salt is not hygroscopic. It is recrystd from a small volume of acetic acid, by addition of EtOH and the crysts are washed with EtOH then Et20 and dried in a vac. [Taylor, Ehrhart and Karanisi Org Synth 46 39 7966.]... 

Chemical Designations - Syiwnyms Lead acetate trihydrate Neutral lead acetate Normal lead acetate Salt of Saturn Sugar of lead Chemical Formula Pb(C2H30i)2-3H20. 

To make the acetate salt, the bisacetamide (4.7 g) (0.01 mol) is dissolved in ethyl acetate to vuhich is added glacial acetic acid (OB g) (OjOI mol). Ether is added to precipitate the acetate as a gum vuhich is vuashed vuith hexane, and finally added to dry ether. Allovu to stand for crystallization. MP 141 °C. Analysis for nitrogen calc. 8.0% found 8.2%. 

A proposed mechanism of PET glycolysis would be (1) glycol diffusion into die polymer (2) swelling of the polymer, which increases the rate of diffusion and (3) reaction (transesterification) of the glycol hydroxy group at an ester group in die polyester chain.24 Since it is a transesterification process, metal acetate salts are effective catalysts. 

The Schiff reaction between chitosan and aldehydes or ketones yields the corresponding aldimines and ketimines, which are converted to N-alkyl derivatives upon hydrogenation with borohydride. Chitosan acetate salt can be converted into chitin upon heating [130]. The following are important examples of modified chitosans that currently have niche markets or prominent places in advanced research. 

One of the simplest ways to prepare a chitin gel is to treat chitosan acetate salt solution with carbodiimide to restore acetamido groups. Thermally not reversible gels are obtained by AT-acylation of chitosans N-acetyl-, N-propionyl- and N-butyryl-chitosan gels are prepared using 10% aqueous acefic, propionic and bufyric acid as solvents for treatment with appropriate acyl anhydride. Both N- and 0-acylation are found, but the gelation also occurs by selective AT-acylation in the presence of organic solvents. 

Cotton-like chitosan obtained by spinning chitosan acetate salt into a coagulating bath of ethylene glycol, ice and NaOH fibers washed with water and methanol. 

CN l-(N-methylglycine)-5-L-valine-8-L-alanineangiotensin II acetate (salt) hydrate saralasin... 

C8H12N2 99-98-9) see Methylthioninium chloride 4-ainino-l,3-dimethylbenzene (CgH N 95-6S-7) see Picotamide (5K,6S)-6-aniino-2,2-dimethyl-l,3-dioxepan-5-ol acetate (salt)... 

A buffer soiution must contain both the acid and its conjugate base, so at least two reagents must be added to water to prepare a buffer soiution. An acetate buffer can be prepared, for example, from pure water, concentrated acetic acid, and an acetate salt. The cation contained in the salt should not have acid-base properties of its own, so sodium acetate would be an appropriate choice, but ammonium acetate would not. 

More interesting was the elemental analysis of the residue. Whereas a 2 1 AcOH [DMEpy]l should have contained 33% iodine, the elemental analysis indicated the residue contained only 0.7% iodine. This clearly indicated that we no longer had an iodide salt, but more likely had an acetate salt, most likely a 2 1 mixture of AcOH [DMEpy] [OAc]. (The formation of a 2 1 salt would be typical of our experience with ionic liquids. In practice they normally tenaciously retain ca. 2 mol AcOH/mol of ionic liquid, a phenomena we noted in om earlier reports. (3) Closer comparison of the salt obtained and low levels of Mel detected in the effluent indicated that the amount of [DMEpy] [OAc] generated closely matched the total Mel (ca. 90-95% yield of Mel based on [DMEpy][OAc].) Further, the elemental analysis was unable to detect any Rh in the effluent, so we could conclude that there was no aspiration occurring. This clearly indicated that our ionic liquid loss was due to metathesis of the ionic liquid from the iodide to the acetate salt, likely due to reaction (23) which likely sublimed overhead. In principle, the miniscule amount of Mel and ionic liquid could be returned to the reactor to maintain the process. 

Acid-base disturbances associated with PN usually are related to the patient s underlying condition(s). However, acid-base abnormalities may develop as a result of changes in chloride or acetate concentrations in PN admixtures. Because acetate is converted to bicarbonate in the body, excessive acetate salts in PN can lead to metabolic alkalosis excessive chloride salts in PN can lead to metabolic acidosis. PN should not be used to... 

Iodide and acetate salts increase the rate of reaction of Li [1] with CH3I at 25 °C in acetic acid. The effects of water, LiBF4, and other additives are also reported. Iodide salts also promote catalytic methanol carbonylation at low water concentrations. In the case of Lil promoter, lithium acetate is produced. The promotional effects of iodide and acetate on both the model and catalytic systems are rationalized in terms of iodide or acetate coordination to (1) to yield five-coordinate RhI anions as reactive intermediates for rate-determining reactions with CH3I.11... 

We attempted the key intramolecular oxa-[3 + 3] annulation reaction of diketo-enal 8 under high-dilution conditions at room temperature using piperidinium acetate salt in THF. We were delighted upon the discovery of the formation of the desired... 

In the indirect polarimetry method [561] sodium is precipitated as the zinc uranyl acetate salt and the uranium present in the precipitate is determined... 

CAS 4368-28-9 39920-04-2 (Racemic mixture) 629653-73-2 (Acetate salt) 18660-81-6 (Citrate salt) 17522-62-2 (Formate salt) 4664-41-9 (Hydrobromide salt) 4664-40-8 (Picrate salt) 129497-92-3 (Trifluoroacetate salt)... 

Synthesis. The first example of a stable, soluble pz peripherally substituted with a heteroatomic moiety involved appended thioether groups, M[pz(.V-Mc)8, as reported in 1980 by Schramm and Hoffman (2) (Scheme 9, 45-48). Mg[pz(5 -Me)s], 46, was prepared in a 60% yield by a magnesium templated macrocyclization of dinitrile, 45. Demetalation with sulfuric acid gave H2[pz(5 -Me)8], 47 (65%) and remetalation with the anhydrous acetate salts of copper and nickel gave 48 (80%) and 49 (65%). 

Evidence has been presented that iodide salts can promote the oxidative addition of Mel to [Rh(CO)2l2]"> the rate-determining step in the Rh cycle [12]. The precise mechanism of this promotion remains unclear formation of a highly nucleophilic dianion, [Rh(CO)2l3]2 , has been suggested, although there is no direct spectroscopic evidence for its detection. Possible participation of this dianion has been considered in a theoretical study [23]. An alternative nucleophilic dianion, [Rh(CO)2l2(OAc)]2 , has also been proposed [31,32] on the basis that acetate salts (either added or generated in situ via Eq. 7) can promote carbonylation. Iodide salts have also been found to be effective promoters for the anhydrous carbonylation of methyl acetate to acetic anhydride [33]. In the absence of water, the catalyst cannot be maintained in its active form ([Rh(CO)2l2]") by addition of Lil alone, and some H2 is added to the gas feed to reduce the inactive [Rh(CO)2l4]. ... 

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