A study of the thermolysis of Dewar acetophenone to acetophenone is reported. This valence isomerization is found to proceed to a small degree (approx. 0.1%) via the non-adiabatic chemiexcitation of triplet acetophenone. Comparison of the activation param...

obtained from acetophenone and acetylene in a nitric environ- .... tion of acetophenone for several days at room temperature, there ...

... Agency (7508W) Reregistration Eligibility Decision (RED) Bromohydroxy- acetophenone (BHAP) Page 2. BHAP Page 3. ...

The effect of pressure, temperature, and solvent composition on the rate of the acidcatalyzed enolization of acetone and acetophenone, and the solvent deuterium isotope effect for the enolization of acetophenone, were measured by following the iodination....

The Environmental Criteria and Assessment Office, Office of Health and Environmental Assessment has investigated the health and environmental effects for acetophenone. Several quantitative toxicological estimates are presented that reflect evaluations of ...

Only the acetophenone gave a useful product. The condensation ... than acetophenone it would seem imprudent to advocate the widespread ...

Mar 30, 1978 ... 65 acetophenone with appropriate aryl compounds and ..... of the acetophenone is substituted in the para position ...

Acetophenones were screened for activity against positive phototaxis of Chlamydomonas cells, a process that requires co-ordinated flagellar motility. The structure-activity relationships of a series of acetophenones are reported, including acetophenones that affect flagellar motility and cell viability. Notably, 4-methoxyacetophenone, ...

Acetophenones were screened for activity against positive phototaxis of Chlamydomonas cells, a process that requires coordinated flagellar motility. The structure-activity relationships of a series of acetophenones are reported, including acetophenones that affect flagellar motility and cell viability. Notably, 4-methoxyacetophenone, ...

... This compound was condensed with acetophenone, 2-acetylpyridine, 4-acetyldiphenylether and phenylacetaldehyde yielding the corresponding ...

... compounds. Experimental results show that benzaldehyde and acetophenone are the products of primary reactions. Their ...

... In the absence of easily oxidized substrates this perester undergoes thermal fragmentation to yield quantitatively acetophenone and acetic acid. ...

A culture of Nocardia tartaricans ATCC 31190 was capable of catalyzing the conversion of ethylbenzene to 1-phenethanol and acetophenone while growing in a shake flask culture with hexadecane as the source of carbon and energy. This subterminal oxidative reaction with ethylbenzene appears not to have been previously reported for Nocardia species. When N. tartaricans was grown ...

Anaerobic ethylbenzene metabolism in the betaproteobacterium Aromatoleum aromaticum is initiated by anaerobic oxidation to acetophenone via (S)-1-phenylethanol. The subsequent carboxylation of acetophenone to benzoylacetate is catalyzed by an acetophenone-induced enzyme, which has been purified and studied. The same enzyme is involved ...

were a-methylstyrene, acetophenone, 2-phenyl-2-propanol (cumyl alcohol), and ... to the observed product acetophenone and CH3. The CH3 is largely con- ...

The Azine Bridge as a Conjugation Stopper: An NMR Spectroscopic Study of Electron Delocalization NMR spectroscopic data of symmetric and unsymmetric acetophenone azines are presented in support of this design concept. Previous structural, ab initio, and electrochemical studies have shown that the azine

The S2 from S0 photoexcitation spectrum of jet cooled acetophenone is presented. The observed homogeneously broadened linewidths indicate S2 lifetimes

From leaves of PENSTEMON WHIPPLEANUS A. Gray three iridoid glucosides and an acetophenone glucoside have been isolated which were proved to be 10- T-cinnamoylaucubin, eurostoside, mussaenoside and picein, respectively. PMID:17340348

This paper describes the effects of polarity of applied voltage on electrical conduction and space charge formation up to electric breakdown in one-sided acetophenone-coated low-density polyethylene (LDPE) film. At the field before electrical breakdown, negative space charge accumulation was formed in the bulk regardless of the polarity of electrode with ...

A process is described for extracting tetravalent plutonium from an aqueous acid solution with methyl ethyl ketone, methyl isobutyl ketone, or acetophenone and with the extraction of either tetravalent or hexavalent plutonium into menthone. (AEC)

Two new acetophenone derivatives were isolated from the roots of Euphorbia ebracteolata Hayata, their structures were elucidated as 2,4-dihydroxy-6-methoxyl-methylene-3-methyl-acetophenone (1) and 2-dihydroxy-6-methoxyl-methylene-3-methyl-acetophenone-4-O-beta-D-glucopyranoside (2) on the basis of chemical and spectroscopic methods ...

... The condensation of ketones (acetone, methyl ethyl ketone, cyclohexanone and acetophenone) in the presence of ZnCl2 + HCl and in the absence ...

... were obtained of the stimulated Raman effect of anisole, chlorobenzene, chloroprene, dichlorethane, acetophenone, acetylacetone, and chloroform ...

Chlorotrisylsilylenoid reacted with both acetophenone and benzil to give the corresponding 2,5-dioxasilolanes and silylethers, respectively. PMID:20563350

... The samples were esterified with alpha-Bromo-m-methoxy-acetophenone, separated by reversed phase chromatography and monitored at both ...

... of studies involving the generation of bivalent carbon derivatives by photochemical transformations of alpha-diazo acetophenone, beta, gamma ...

... it was shown that 33% emulsions of copolymers of methylmethacrylic (MA) with methylacrylic (MA) with the addition of acetophenone and other ...

... diffraction to determine structural dynamics of excited states and reaction products of isolated aromatic carbonyls, acetophenone and benzaldehyde ...

... Abstract : The far infrared spectra of benzaldehyde, pyridine carboxaldehydes, acetophenone, styrene, nitrobenzene, and some of the halogen ...

... for white mice: benzaldehyde 1240, pentafluorobenzaldehyde 320, benzoic acid 2800, pentafluorobenzoic acid 2500, acetophenone 970 ...

... Title : EFFECT OF PRESSURE ON THE ACID-CATALYZED ENOLIZATION OF ACETONE AND ACETOPHENONE IN VARIOUS ETHANOL-WATER ...

interface between acetophenone and glycerin is stressed by an elec- tric field. In general, the size of these deformations is also ...

A one-pot synthetic protocol of acetophenones from styrenes with molecular oxygen, visible light, and molecular iodine is reported. This procedure involves aerobic photo-oxidation and deiodination in one pot and provides the first report of metal-free direct syntheses of acetophenones from styrenes. PMID:21524090

Chlorinated acetophenones can originate from several sources: insecticides and as by-products of degradation of chlorosubstituted xanthones, PCPs, ethylbenzene, and styrene. This paper describes the isolation and characterization of a mixed culture which mineralizes 4-chloroacetophenone. Arthrobacter sp., found in the mixed culture, was found to utilize 4-chloroacetophenone ...

mice were used to test acetophenone versus propanol discrimination. Mice were housed in a temperature) and homecage (n 5 mice, 18 glomeruli). To evaluate odor discrimination between propanol and acetophenone. The following day, mice were presented with either 10 acetophenone-startle trials or 10 propanol-startle trials

The addition of carbon dioxide and water enhances acetophenone hydrogenation activity over an activated carbon-supported palladium catalyst, and 1-phenylethanol can be easily recovered without distillation and neutralization. Two liquid phases (water and acetophenone) are indispensable for enhancement of the hydrogenation rate. PMID:21952644

Acetophenone can be used as a fragrance ingredient in soaps, detergents, and perfumes; as a flavoring agent in foods, nonalcoholic beverages, and tobacco; and as a solvent for polymers. Acetophenone is used in perfumery industry, mostly in fragrances like honeysuckle and jasmine, flavors of almond, cherry and strawberry and in tobacco and vanilla works. It ...

A mutant derivative of a novel pseudomonad isolated from the soil accumulated acetophenone when supplied with cinnamic acid. The microorganism has been identified as an unclassified Pseudomonas sp., similar to Pseudomonas acidovorans. Mass spectrum analysis of the product acetophenone derived from catabolism of cinnamic acid in the presence of ...

Host location and colonization by bark beetles is dependent upon the relative and absolute amounts of attractant and antiattractant compounds available. Many investigations have lead to use of antiattractants for the management of these pests and have been especially focused on verbenone. However, recent studies have identified new antiattractants for several species of bark beetles. We report ...

The purpose of this investigation was to study the kinetics of the hydrogenation of acetophenone on KGA-43 catalyst, to establish a kinetic model for it, and to test the adequacy of the kinetic model for experiment. The kinetic studies of the hydrogenation of acetophenone on the new KGA-43 catalyst were conducted on a laboratory unit. Using the theory of ...

Alkali Ion-Controlled Excited-State Ordering of Acetophenones Included in Zeolites: Emission, Solid of the lowest triplet excited state of acetophenones included in zeolites has been inferred through steadyLiY and NaY zeolites, the emitting state is identified to have * character, whereas in NaRbY and NaCsY, two

In the acetophenone degradation process by electro-Fenton, the variation trend of fluorescence characteristics of dissolved organic matter (DOM) in acetophenone synthetic wastewater was detected by excitation-emission matrix (EEM) fluorescence spectra. The fluorescence spectra characteristics of acetophenone were studied, and the ...

... Title : The S sub 0 to S sub 2 Laser Photoexcitation Spectrum and Excited State Dynamics of Jet-Cooled Acetophenone. ...

... of two typical 'triplet quenchers', nickel dibutyldithiocarbamate (NiDBC) and the nickel complex of 2-hydroxy-4-methyl acetophenone oxime (NiOx). ...

... The characteristic emission spectra of a matrix of NE111 doped with benzophenone, acetophenone, and piperidine each at concentrations of 0, ...

... times to removet unreacted thiourea. ... changed a brown solid-like paste.) The reaction mixture became very sticky ... (1) Acetophenone oxime. 9 0 ...

monomers, which was not successful for the preparation of I was, h_0wever, successful with (phenylethynyi)trifluoromethyl- acetophenone. 12(Scheme ...

... AW, Tinuvin P, and oxanilide and may be applied to fabrics from an aqueous emulsion at 265 F by means of an acetophenone based carrier. ...

... ethers are oxidized as well, with the most unlikely case, the methyl ether of 2-phenyl-2-propanol, cleanly and rapidly yielding acetophenone. ...

... electrodes (6.4, 12.5, and 25 micrometers) in concentrated solutions of organic redox species (nitrobenzene, acetophenone and benzophenone ...

Acetophenone. Diphenyl ether. Biphenyl. Phenyl salicylate. Anthrone. Dioc tyl ph thalate. 9-fluorenone. The LC parameters used for this evaluation were as ...

... Methyl alcohol Ethanediol Ethyl alcohol 1s2 Propanediol 1-Propanol 1:3 Propanediol 2-Propanol Glycerol Acetophenone Glycerol monoacetate ...

acetophenone condensed with aniline in the presence of aniline hydrochloride to form 1,1-bis (4-aminophenyl)-1-phenyl-2 , 2, 2-trifluoroethane in good ...

sitizer, acetophenone. The syn- thesized adduct had a melting point of 345-356�C , whi is in agreement with literature data. The neutralization equivalent in ...

p- (p -2 -n-propoxyethoxybenz ylideneamino) acetophenone, and Francis and Luckhurst. (ref. 3) have obtained narrow EPR lines for an inorganic solute ...

We have used investigations of low-temperature photoluminescence and thermally stimulated luminescence to study the effect of acetophenone and pyrene dopants on the photochemical stability of poly(methylphenylsilane) (PMPS) films. We have established that pure PMPS films and acetophenone-doped PMPS films degrade on exposure to UV radiation due to breaking ...

... Pagination or Media Count : 4. Abstract : The half-wave reduction potentials of ten acetophenone derivatives have been determined in acetonitrile. ...

... 126.2 deg C) which was sensitive to atmospheric O. III was identical with a sample prepared from 7-phenyl-hepta-2, 4, 6-trienal and acetophenone. ...

Abstract: Linear free energy relationship between benzoyl and acetyl ion intensities in mass spectra of benzo- hide. and acetophenones explained by kinetic ...

of L. The formation of 2,4-diphenylpyrrole, l2, from - 2 and acetophenone, in the. 1 presence of sulfinate anion was recently reported (6). ...

The total synthesis of nomeolignans isolated from Krameria species, 2-aryl-5-(E)-propenylbenzofurans (5, 11), is described. The key step involves the one-pot reaction for 2-arylbenzofurans (2, 7) from 4-hydroxyphenylacetone with 4'-acetoxy-2-chloro-2-(methylthio)acetophenone (1) and 2-chloro-2-methylthio-(2',4',6'-trimethoxy)acetophenone (6) under ...

NRMRL-CIN-1649 Namboodiri**, V., Varma*, R.S., Sahle-Demessie*, E., and Pillia**, U. Selective Oxidation of Styrene to Acetophenone in Presence of Ionic Liquids. Green Chemistry (White, J.D. (Ed.), Great Britain: The Royal Society of Chemistry) 4 (2):170-173 (2002). EPA/600/J-02...

Bromohydroxyacetophenone is a microbiocide/microbistat registered by Buckman Laboratories. Three registered products, Busan 90, Busan 93, and Busan 1130, contain this active ingredient. The document presents the Agency's decision regarding the reregistrat...

The photochemical reaction of acetophenone and cyclohexane in the zeolite NaY occurs by combination of the geminate radical pairs to give products that reveal a significant amount of rotational fluidity, which was also documented by intermolecular nuclear dipolar interactions measurements using cross polarization ¹³C NMR (CPMAS) experiments.

A total of 120 fungal strains were isolated from soil samples and evaluated in the bioreduction of substituted acetophenones to the corresponding (R)-alcohols. Among these strains, isolate Trichothecium roseum EBK-18 was highly effective in the production of (R)-alcohols with excellent enantioselectivity (ee > 99%). Gram scale preparation of (R)-1-phenylethanol is reported. ...

The action of polyphosphoric acid on acetophenone produces two crystalline yellow hydrocarbons (A and B) of the formula C/sub 32/H/sub 24/; other products isolated are benzoic acid, dypnone, and a yellow substance (C) melting above 300 deg . The lower-melting yellow hydrocarbon (A) is isomerized to a colorless hydrocarbon (D). Studies of the reactions and spectra of ...

The influence of an external magnetic field on the electrochemical reduction of acetophenone (AP) at Pt and Au microdisk electrodes (radii = 0.1, 6.4, 12.5 and 25 micrometers) is described. Voltammetric measurements in CH3CN/(n-Bu4NPF6 solutions containin...

A high yield. four step synthesis process is disclosed for producing the monomer, 2,3-diphenyl-1,3-butadiene, wherein in step 1 acetophone pinacol is produced from the dimerization of acetophenone in 96% yield; in step 2 acetophenone pinacol is reacted wi...

Practical, cheap, and stereoselective synthetic methods were applied to the preparation of novel 1-(aminoalkyl)naphthol and gamma-aminoalcohol tridentate ligands. The ligands obtained were conveniently applied with good results as catalytic sources in the borane-mediated enantioselective reduction of acetophenone with borane dimethylsulfide. Conformational analysis through ...

The 1,4-dianions of acetophenone, para-substituted acetophenones, deoxybenzoin and dibenzyl ketone phenylhydrazone were prepared by treatment of the respective phenylhydrazone with two molecular equivalents of n-butyllithium in tetrahydrofuran-hexane at 0...

Photolysis of 2-diphenylmethoxyacetophenone (1) in deaerated acetonitrile at room temperature is expected to proceed via Norrish Type II reaction to generate benzophenone (2) and acetophenone (4) as the main isolated photoproducts. Although the acetophenone enol intermediate (3) is generally considered a putative intermediate that is a precursor of ...

Ninety isolates of microorganisms belonging to different taxonomical groups (30 bacteria, 20 yeast, and 40 fungi) were previously isolated from various samples. These isolates were screened as reducing agents for acetophenone 1a to phenylethanol 2a. It was found that the isolate EBK-10 was the most effective biocatalyst for the enantioselective bioreduction of ...

Acetophenone, ethyl butyrate and 2-phenyl ethanol were used as additives to media on which Tribolium castaneum (Herbst) and Lasioderma serricorne (Fabricius) were cultured for 65 days. Acetophenone and ethyl butyrate had a positive impact on the weight and multiplication of the insects. The weight and rate of multiplication was higher in feed media ...

The sulfur of acetophenone thiosemicarbazone {(Ph)(Me)C=N-NH-C(=S)NH(2); Haptsc} and two iodine atoms form an unusual heterobridge in the dinuclear complex [(Ph(3)P)Cu(mu-I)(2)(mu-S-Haptsc)Cu(PPh(3))] (1), leading to a short Cu--Cu distance of 2.504(1) Angstrom. This uncommon heterobridging is attributed to the presence of a methyl substituent at the Schiff base C2 carbon atom ...

This report describes the factors that determine the extent of sorption of organic compounds that are representative of coal conversion waste streams. The compounds, all radiolabeled, were acetophenone; 1-naphthol; pyrene; 7,12-dimethylbenz(a)anthracene; ...

... acetophenone to 1-phenylethanol was performed under an argon atmosphere ... (16). The Ru(bpy)32+/MV2+ couple is a paradigmatic electron donor/electron ... ...

The oral LD (Subscript 50) of the following compds. were detd. for white mice: benzaldehyde 1240, pentafluorobenzaldehyde 320, benzoic acid 2800, pentafluorobenzoic acid 2500, acetophenone 970, pentafluoroacetophenone 850, decafluorohydrobenzoin 485, dini...

aldehydes. No evidence of 1,4-type addition with cinnamaldehyde was observed. Remarkably, even acetophenone, Scheme 3. In combination with benzaldehyde and (E)-cinnamaldehyde, the anti aldol products 8 were

Presents procedures, experiments, demonstrations, teaching suggestions, and information on a variety of chemistry topics including, for example, inert gases, light-induced reactions, calculators, identification of substituted acetophenones, the elements, analysis of copper minerals, extraction of metallic strontium, equilibrium, halogens, and sodium amalgam/chlorine cells. ...

...305 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) TOXIC...following statement shall appear on each label as specified in § 721.72(b) and...iii) Industrial, commercial, and consumer activities. Requirements as...