Search results for "Carbon disulfide"
showing 10 items of 14 documents
Studies on ultramicro- and trace analysis of organic substances
1965
Summary For the determination of about 1 μg hydrogen in nonvolatile organic compounds 10–40 μg of the substance are burnt at > 1000°C in a slow stream of oxygen. The water generated is converted to H 2 S by reaction with carbon disulfide in a flow of nitrogen at 500°C catalyzed by α-Al 2 O 3 . The hydrogen sulfide is argentimetrically titrated by a potentiometric method. The standard deviation of the method is ± 10 ng H. There are no interferences by N, S, and the halogens.
Eine einfache Synthese für N-[3-[3-(1-Piperidinylmethyl)-phenoxy]propyl]hydrazincarbothioamid
1985
Synthese par reaction one pot de l'amino-3″ propoxy-3' benzyl-1 piperidine avec CS 2 , l'iodomethane et l'hydrazine
Preliminary Results on the Use of Leather Chrome Shavings for Air Passive Sampling
2012
A new passive sampler based on low-density polyethylene (LDPE) layflat tube filled with chrome shavings from tannery waste residues was evaluated to determine volatile organic compounds (VOCs) in indoor and outdoor areas. VOCs were directly determined by head space-gas chromatography-mass spectrometry (HS-GC-MS) without any pretreatment of the sampler and avoiding the use of solvents. Limit of detection values ranging from 20 to 75 ng sampler−1and good repeatability values were obtained for VOCs under study with relative standard deviation values from 2.8 to 9.6% except for carbon disulfide for which it was 22.5%. The effect of the amount of chrome shavings per sampler was studied and resul…
Herstellung von 1,5‐Cyclooctadiin und 1,3,5,7‐Cyclooctatetraen aus 1,5‐Cyclooctadien
1994
Preparation of 1,5-Cyclooctadiyne and 1,3,5,7-Cyclooctatetraene from 1,5-Cyclooctadiene Bromination of 1,5-cyclooctadiene (1) and stepwise dehydro-bromination first with KOtBu and then with KOtBu/18-crown-6 yields 1,5-cyclooctadiyne (5). A prolonged interaction of the base causes a complete transformation to cyclooc-tatetraene (6). Diyne 5 and even more the intermediate enyne 4 are highly reactive dienophiles. The cycloadducts 10–14 formed with 1,3-cyclohexadiene, carbon disulfide, and tetraphenylcyclopentadienone were isolated and characterized. Treatment of 5 with titanium tetrachloride induces a vigorous polymerization.
Synthesis of Both Ionic Species of Ammonium Dithiocarbamate Derived Cholic Acid Moieties
2011
The reaction of 3-aminopropylamide of cholic acid with CS2 produced a bile acid derivative of dithiocarbamic acid which further formed an ammonium salt with another molecule of 3-aminopropylamide of cholic acid. The cationic 3-ammonium propylamide of cholic acid did not react further with CS2 and the formed salt was stable in the reaction mixture, even when excess CS2 was used. When the reaction was carried out in the presence of aqueous sodium hydroxide, only the bile acid derivative of sodium dithiocarbamate was formed. The dithiocarbamate derivatives were characterized by 1H- and 13C-NMR spectroscopy and ESI-TOF mass spectrometry.
Ex vivo emission of volatile organic compounds from gastric cancer and non-cancerous tissue
2018
The presence of certain volatile organic compounds (VOCs) in the breath of patients with gastric cancer has been reported by a number of research groups; however, the source of these compounds remains controversial. Comparison of VOCs emitted from gastric cancer tissue to those emitted from non-cancerous tissue would help in understanding which of the VOCs are associated with gastric cancer and provide a deeper knowledge on their generation. Gas chromatography with mass spectrometric detection (GC-MS) coupled with head-space needle trap extraction (HS-NTE) as the pre-concentration technique, was used to identify and quantify VOCs released by gastric cancer and non-cancerous tissue samples c…
Nonlinear refraction and absorption of spectrally tuneable picosecond pulses in carbon disulfide
2021
Abstract We analyze the spectral dependence of the nonlinear refractive index and nonlinear absorption coefficient of carbon disulfide (CS2) in the spectral range of 400–1100 nm using picosecond laser pulses. An increase of the nonlinear refractive index of CS2 at the shorter wavelength region compared with the near infrared region (9 × 10−14 cm2 W−1 (λ = 700 nm) and 4 × 10−14 cm2 W−1 (λ = 1000 nm), respectively) follows by a decrease of this parameter at the wavelengths below 600 nm. We compare the spectral dependences of the lower- and higher-order nonlinear absorption coefficients in carbon disulfide. The three-photon absorption coefficient was found to be maximal at λ = 1000 nm (β3PA = …
An experimental investigation of the nonlinear refractive index (n2) of carbon disulfide and toluene by spectral shearing interferometry and z-scan t…
2003
International audience; The recently proposed spectral shear interferometry and the well-known z-scan techniques were employed for the determination of the nonlinear refractive index n2 of CS2, toluene and fused silica. The determined n2 values by both techniques were found to be in very good agreement. In addition, the role of the repetition rate of the laser is also investigated revealing its importance for the correct determination of both the size and the sign of the nonlinearity.
CCDC 1946099: Experimental Crystal Structure Determination
2020
Related Article: Qiang Chen, Dieter Schollmeyer, Klaus Müllen, Akimitsu Narita|2019|J.Am.Chem.Soc.|141|19994|doi:10.1021/jacs.9b10957
CCDC 660922: Experimental Crystal Structure Determination
2010
Related Article: M.Ohba, K.Yoneda, G.Agusti, M.C.Munoz, A.B.Gaspar, J.A.Real, M.Yamasaki, H.Ando, Y.Nakao, S.Sakaki, S.Kitagawa|2009|Angew.Chem.,Int.Ed.|48|4767|doi:10.1002/anie.200806039