Showing papers on "Butanone published in 1984"
TL;DR: Steam distillation, solvent extraction, and ion exchange procedures have been employed to isolate volatile organic acids, bases, and neutral compounds from process waters generated during the retorting of oil shale as mentioned in this paper.
Abstract: Steam distillation, solvent extraction, and ion exchange procedures have been employed to isolate volatile organic acids, bases, and neutral compounds from process waters generated during the retorting of oil shale. Gas chromatography was used for the analysis of the isolated components and for the direct analysis of the process waters. The use of these multiple isolation and analyses procedures has resulted in the determination of the following compounds with the amounts in ..mu..g/mL given in parentheses: 12C/sub 2/ to C/sub 10/ aliphatic acids (26 to 450); phenol (21); pyridine (5); five methyl substituted pyridines (3 to 19); aniline (2); isoquinoline (2); four C/sub 1/ to C/sub 4/ n-alkylamines (2 to 10); three C/sub 2/ to C/sub 4/ n-alkylnitriles (1 to 21); benzonitrile (3); formaldehyde (500); acetaldehyde (2); propanone (16); and butanone (6). The advantages of steam distillation and ion exchange for the isolation and eventual analysis for water containing complex mixtures of volatile acidic, basic, and neutral organic compounents are described.
31 citations
TL;DR: In this article, the cosolvent character of n-undecane(1)/butanone(2)/poly(dimethylsiloxane) (3) has been determined at 20.0°C, as the inversion in λ and the maxima in A2 and in [η, at o 10 ⋍0.65, seem to indicate.
24 citations
TL;DR: In the absence of nucleophiles, mild thermolysis of a cationic tungstenphosphabicycio[1.1.0] butanone complex yields a novel η 2 -phosphinocarbene complex as discussed by the authors.
19 citations
TL;DR: Etude dans un grand domaine de concentrations. Relaxation du polymere a l'etat fondu en fonction de la temperature as mentioned in this paper, et al.
Abstract: Etude dans un grand domaine de concentrations. Relaxation du polymere a l'etat fondu en fonction de la temperature
15 citations
13 citations
TL;DR: La reaction des complexes η 5 -C 5 H 5 (CO)[P(CH 3 ) 3 ]WC(R)CO avec R 2 PCl fournit a −78°C des rendements eleves de sels des cations tungstaphosphabicyclo [1.1.0] butanone as discussed by the authors
12 citations
TL;DR: In this paper, the laser-flash photolysis of propanone, butanone and 2-pentanone was carried out in dichloromethane (265 nm, 15 ns flash duration).
Abstract: The laser-flash photolysis of propanone, butanone, and 2-pentanone were carried out in dichloromethane (265 nm, 15 ns flash duration). The emission spectra (fluorescence, phosphorescence, and P-type delayed fluorescence) and the transient absorption spectra (triplet state and acetyl radical) were recorded. From the decays of the emission and the absorption, the unimolecular (triplet decay) and bimolecular (T–T annihilation and self quenching) reaction-rate constants were determined. Oxygen quenched the triplet states with a diffusion-controlled rate constant (kO2=ca. 3×10 dm3mol−1 s−1).
10 citations
Journal Article•
TL;DR: In this paper, the photoreaction of 2, 3-benzo-1, 1-dimethyl-1-sila-2-cyclobutene (9 or 10) with an aldehyde or ketone results in 1:1 cycloadduct of [4 + 2] type.
Abstract: The photoreaction of 2, 3-benzo-1, 1-diphenyl (or dimethyl)-1-sila-2-cyclobutene (9 or 10) with an aldehyde or ketone results in 1:1 cycloadduct of [4 + 2] type. In the reactions of 2, 3-benzo-1, 1-dimethyl-1-sila-2-cyclobutene (10) with acetone and butanone, another 1:1 adducts (13) were also formed, respectively. The following facts indicate that the formation of adduct involves an attack of a triplet carbonyl compound on the silicon of the benzosilacyclobutene, an process. (1) Even when the reaction of 9 with acetophenone was carried out under conditions such that more than 99% of incident light was absorbed only by acetophenone using the filter solution of aq. cupric sulfate, the same adduct was still formed. (2) When the reaction of 9 with acetone was carried out under oxygen atmosphere, only trace amount of adduct was formed.
6 citations
TL;DR: In this paper, a new spectrophotometric method for the determination of benzene in air is described, which is based upon the nitration of the benzene to m-dinitrobenzene and subsequent reduction to m -phenylenediamine.
2 citations