Tag: 100-200

On December 31, 2013, Zhang, Piyong; Yang, Hai-Jian; Xu, Lingxiao published an article.Product Details of 78-26-2 The title of the article was Solubilities and partial molar volumes of new CO2-philic propane derivatives in supercritical carbon dioxide. And the article contained the following:

Three new potent CO2-philic propane derivatives were designed and synthesized. Their structures were characterized by NMR, FTIR, and elemental anal. Phase behavior of the three compounds was investigated at T = (313, 323, 333, 343 or 353) K and pressures from (7.7 to 12.1) MPa in supercritical carbon dioxide. The measured solubility data were correlated using three models: Chrastil, Sung and Shim (SS), and Jouyban-Chan-Foster (JCF) semi-empirical models, and satisfied agreements were obtained. Solubility data were also utilized to estimate the partial molar volume V̅2 for each compound in the supercritical phase using the theory developed by Kumar and Johnston. The experimental process involved the reaction of 2-Methyl-2-propylpropane-1,3-diol(cas: 78-26-2).Product Details of 78-26-2

The Article related to supercritical carbon dioxide philic propane derivative molar volume solubility, Phase Equilibriums, Chemical Equilibriums, and Solutions: Phase Equilibriums, Solubility and other aspects.Product Details of 78-26-2

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On November 30, 2013, Cai, Zhuofu; Wang, Lihua; Yang, Hai-Jian; Zhao, Lu published an article.Product Details of 78-26-2 The title of the article was Solubility of 2-methyl-2-propyl-1,3-propanediol and its derivatives in supercritical carbon dioxide: measurement and mathematical modeling. And the article contained the following:

The modifications for the end group of 2-methyl-2-propyl-1,3-propanediol were achieved by reacting with Me oxalyl chloride and Me malonyl chloride to generate two new CO2-philic compounds: bis(methoxyoxalic)-2-methyl-2-Pr propylene glycol ester and bis(methoxymalonic)-2-methyl-2-Pr propylene glycol ester. After that, the solubilities of these 3 compounds were tested and compared in supercritical CO2 (scCO2) within the temperature range of (313-353) K and in the pressure range of (9.3-19.0) MPa. The influence of molar mass and end group on the solubility of compound was also studied. In addition, the exptl. solubility data were correlated according to Bartle, Chrastil and JCF model, and good consistencies were obtained. The average absolute relative deviation (AARD) of the measured values were (5.83, 8.98, 8.77)% when using Bartle’s method, (10.95, 7.53, 7.55)% for Chrastil’s method, and (6.89, 4.10, 4.19)% for the JCF method, resp. It is obvious that the JCF model was proven to be the best model because it had more adjustable parameters of temperature and pressure. Finally, the partial molar volumes V2 for each compound in the supercritical phase were estimated in accordance with Kumar and Johnston’s theory. The experimental process involved the reaction of 2-Methyl-2-propylpropane-1,3-diol(cas: 78-26-2).Product Details of 78-26-2

The Article related to methylpropylpropanediol derivative solubility supercritical carbon dioxide, Phase Equilibriums, Chemical Equilibriums, and Solutions: Phase Equilibriums, Solubility and other aspects.Product Details of 78-26-2

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On April 26, 2021, Rozanska, Xavier; Wimmer, Erich; de Meyer, Frederick published an article.HPLC of Formula: 2160-93-2 The title of the article was Quantitative Kinetic Model of CO2 Absorption in Aqueous Tertiary Amine Solvents. And the article contained the following:

Aqueous tertiary amine solutions are increasingly used in industrial CO2 capture operations because they are more energy-efficient than primary or secondary amines and demonstrate higher CO2 absorption capacity. Yet, tertiary amine solutions have a significant drawback in that they tend to have lower CO2 absorption rates. To identify tertiary amines that absorb CO2 faster, it would be efficacious to have a quant. and predictive model of the rate-controlling processes. Despite numerous attempts to date, this goal has been elusive. The present computational approach achieves this goal by focusing on the reaction of CO2 with OH- forming HCO3-. The performance of the resulting model is demonstrated for a consistent exptl. data set of the absorption rates of CO2 for 24 different aqueous tertiary amine solvents. The key to the new model’s success is the manner in which the free energy barrier for the reaction of CO2 with OH- is evaluated from the differences among the solvation free energies of CO2, OH-, and HCO3-, while the pKa of the amines controls the concentration of OH-. These solvation energies are obtained from mol. dynamics simulations. The exptl. value of the free energy of reaction of CO2 with pure water is combined with information about measured rates of absorption of CO2 in an aqueous amine solvent in order to calibrate the absorption rate model. This model achieves a relative accuracy better than 0.1 kJ mol-1 for the free energies of activation for CO2 absorption in aqueous amine solutions and 0.07 g L-1 min-1 for the absorption rate of CO2. Such high accuracies are necessary to predict the correct exptl. ranking of CO2 absorption rates, thus providing a quant. approach of practical interest. The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).HPLC of Formula: 2160-93-2

The Article related to carbon dioxide absorption tertiary amine solvent quant kinetic model, Phase Equilibriums, Chemical Equilibriums, and Solutions: Phase Equilibriums, Solubility and other aspects.HPLC of Formula: 2160-93-2

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On February 29, 2020, Trolleboe, Anastasia A.; Hartono, Ardi; Usman, Muhammad; Saeed, Muhammad; Svendsen, Hallvard F. published an article.Related Products of 2160-93-2 The title of the article was Vapour-liquid equilibria in pure N-Methyl-1,3-diaminopropane (MAPA), 1,3-diaminopropane (DAP), 2-(Isopropylamino)ethanol (IPAE), N-tert-Butyldiethanolamine (N-TBDEA) and their aqueous solutions. And the article contained the following:

New energy effective solvents are in demand to make global CO2 capture feasible. Phase change solvents seem to be one avenue to reach this goal. This paper presents new exptl. data and modeling results for four amines that have potential as new solvents in blends for post combustion CO2 capture. Both pure component data and data for amine-water solutions, based on ebulliometer measurements, are presented. The data were fitted to an Antoine equation and an NRTL model in two ways: first in a combined fit of both pure component and binary data and then in sep. fits to the individual data sets. The methods were compared and guidelines as to which method to use, based on available data, is provided. Data for 2-(Isopropylamino)ethanol (IPAE), N-tert-Butyldiethanolamine (N-TBDEA), N-Methyl-1,3-diaminopropane (MAPA) and 1,3-diaminopropane (DAP) from the literature were collected and compared with the new data sets. All data and model parameters are given. For all amines, the best fits provided good to excellent representations of the available data. The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).Related Products of 2160-93-2

The Article related to mapa dap ipae tbdea aqueous solution vapor liquid equilibrium, Phase Equilibriums, Chemical Equilibriums, and Solutions: Phase Equilibriums, Solubility and other aspects.Related Products of 2160-93-2

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On October 31, 1993, Stephenson, Richard M. published an article.Synthetic Route of 2160-93-2 The title of the article was Mutual solubilities: water + cyclic amines, water + alkanolamines, and water + polyamines. And the article contained the following:

Reciprocal solubilities for water + cyclic amines, water + alkanolamines, and water + polyamines were measured. Of the 24 cyclic amines studied, only furfurylamine and cyclohexylamine were consolute with water. Of 31 alkanolamines studied, 26 were miscible with water in all proportions, 3 were partially miscible at 0-90°, and 2 had lower critical solution temperatures of 13.6 and 30°. Of 27 polyamines studied, 24 were miscible with water in all proportions, only 1 was partially miscible at 0-90°, and 2 had lower critical solution temperatures of 3 and 57°. The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).Synthetic Route of 2160-93-2

The Article related to solubility water amine alkanolamine polyamine, Phase Equilibriums, Chemical Equilibriums, and Solutions: Phase Equilibriums, Solubility and other aspects.Synthetic Route of 2160-93-2

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On April 7, 2020, Joven-Sancho, Daniel; Baya, Miguel; Martin, Antonio; Orduna, Jesus; Menjon, Babil published an article.SDS of cas: 143-10-2 The title of the article was The First Organosilver(III) Fluoride, [PPh4][(CF3)3AgF]. And the article contained the following:

Organosilver(III) fluoride complexes have been assigned a key role in different fluorination processes. To the best of our knowledge, however, none of them seem to have been isolated or even detected thus far. Here we report on the successful synthesis of the trifluoromethyl derivative [PPh4][(CF3)3AgF], which has been isolated in high yield. The thermodn. stability of the Ag-F bond is shown by calculation and demonstrated by multistage mass spectrometry (MSn) under collision-induced dissociation (CID) conditions. Nevertheless, the substantial elongation found in the Ag-F bond (X-ray) is correlated with a marked nucleophilic character of the terminal F ligand. This Ag-F bond is, in fact, quite reactive: it suffers hydrolysis and is also solvolyzed by thiols. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).SDS of cas: 143-10-2

The Article related to crystal structure mol optimized organosilver fluoride preparation hydrolysis solvolysis, fluorides, high oxidation state, organosilver(iii), thiols, trifluoromethylation, Organometallic and Organometalloidal Compounds: Groups Ib, Iib – Cu, Ag, Au, Zn, Cd, Hg and other aspects.SDS of cas: 143-10-2

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Rozsar, Daniel; Formica, Michele; Yamazaki, Ken; Hamlin, Trevor A.; Dixon, Darren J. published an article in 2021, the title of the article was Bifunctional iminophosphorane catalyzed enantioselective sulfa-Michael addition to unactivated α,β-unsaturated amides.SDS of cas: 72364-46-6 And the article contains the following content:

The first metal-free catalytic intermol. enantioselective sulfa-Michael addition to unactivated α,β-unsaturated amides is described. Consistently high enantiomeric excesses, and yields were obtained over a wide range of alkyl thiol pronucleophiles and electrophiles under mild reaction conditions, enabled by a novel squaramide-based bifunctional iminophosphorane (BIMP) catalyst. Low catalyst loadings (2 mol%) were achieved on a decagram scale, demonstrating the scalability of the reaction. Computational anal. revealed the origin of the high enantiofacial selectivity, corresponding transition states, and provided substantial evidence for specific non-covalent activation of the carbonyl group of the α,β-unsaturated amide by the catalyst. The experimental process involved the reaction of (2-Fluorophenyl)methanethiol(cas: 72364-46-6).SDS of cas: 72364-46-6

The Article related to bifunctional iminophosphorane catalyst enantioselective sulfa michael addition, sulfa michael addition unsaturated amide mol modeling, Aliphatic Compounds: Amides, Amidines, Imidic Esters, Hydrazides, and Hydrazonic Esters and other aspects.SDS of cas: 72364-46-6

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Campbell, Stewart John; Darwish, David published an article in 1976, the title of the article was Asymmetric induction in the Sommelet rearrangement of chiral benzylsulfonium salts.Synthetic Route of 58966-31-7 And the article contains the following content:

The Sommelet rearrangement of (+)-ethylmethyl-p-nitrobenzylsulfonium perchlorate (I) and (+)-ethylmethyl-p-chlorobenzylsulfonium perchlorate (II) are described. Elution of I through a hydroxide exchange resin generated ethylmethylsulfonium p-nitrobenzylide [(+)-III] which decomposed in methanol at room temperature to Et 2-methyl-5-nitrobenzyl sulfide and (+)-Me α-(2-methyl-5-nitrophenyl)ethyl sulfide with 18 to 20.3% asymmetric induction. Decomposition of II in NaOMe solution at 70° produced Et 2-methyl-5-chlorobenzyl sulfide and (+)-Me α-(2-methyl-5-chlorophenyl)ethyl sulfide with 21 to 25.5% asymmetric induction. The lower estimates of asymmetric induction for each sulfide were made by comparison with sp. rotations of authentic samples obtained by synthesis and resolution The higher estimates were obtained by the use of a chiral lanthanide shift reagent Eu(hfbc)3 with the sulfone derivatives of these chiral sulfides. The ylide (+)-III reacted with aldehydes to produce oxiranes with no induction of asymmetry. The experimental process involved the reaction of 1-(5-Chloro-2-methylphenyl)ethanol(cas: 58966-31-7).Synthetic Route of 58966-31-7

The Article related to asym sommelet rearrangement benzylsulfonium, sulfonium asym sommelet rearrangement, Physical Organic Chemistry: Rearrangements, Including Isomerization and Tautomerization and other aspects.Synthetic Route of 58966-31-7

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Jablonsky, Michal; Majova, Veronika; Strizincova, Petra; Sima, Jozef; Jablonsky, Jozef published an article in 2020, the title of the article was Investigation of total phenolic content and antioxidant activities of spruce bark extracts isolated by deep eutectic solvents.Recommanded Product: 111-29-5 And the article contains the following content:

Extracts from spruce bark obtained using different deep eutectic solvents were screened for their total phenolic content (TPC) and antioxidant activities. Water containing choline chloride-based deep eutectic solvents (DESs) with lactic acid and 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, and 1,5-pentanediol, with different molar ratios, were used as extractants. Basic characteristics of the DESs (d., viscosity, conductivity, and refractive index) were determined All the DESs used behave as Newtonian liquids The extractions were performed for 2 h at 60°C under continuous stirring. TPC was determined spectrophotometrically, using the Folin-Ciocalteu reagent, and expressed as gallic acid equivalent (GAE). The antioxidant activity was determined spectrophotometrically by 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay. The TPC varied from 233.6 to 596.2 mg GAE/100 g dry bark; radical scavenging activity (RSA) ranged between 81.4% and 95%. This study demonstrated that deep eutectic solvents are suitable solvents for extracting phenolic compounds from spruce bark. The experimental process involved the reaction of Pentane-1,5-diol(cas: 111-29-5).Recommanded Product: 111-29-5

The Article related to phenolic content antioxidant activity spruce bark deep eutectic solvent, Cellulose, Lignin, Paper, and Other Wood Products: Wood and Other Cellulosic Materials and other aspects.Recommanded Product: 111-29-5

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On June 15, 2022, Namdeo, Ashutosh; Jhaveri, Jainesh H.; Mahajani, S. M.; Suresh, A. K. published an article.COA of Formula: C3H6O4 The title of the article was Palladium catalyzed liquid phase oxidation of glycerol under alkaline conditions – Kinetic analysis and modelling. And the article contained the following:

Glycerol is a major byproduct of bio-diesel production and hence its utilization has been an area of high interest in the scientific community. Oxidizing glycerol to high-value products can improve the economics of bio-diesel production In the present work, we study glycerol oxidation in alk. medium using an activated carbon supported Palladium catalyst. Kinetic studies have been performed in a batch reactor to study the effect of different parameters such as NaOH concentration, temperature, and pressure. Our results point to product inhibition by adsorbing reactant and product species. We also observe a relative insensitivity of product yields at a given conversion, to the temperature Our observations further suggest that higher NaOH concentration gives better C3 selectivity while higher oxygen pressure results in lower C3 selectivity. Based on our own studies and the literature available, the most likely kinetic pathway and a kinetic model have been proposed. Our results suggest the possibility that C-C cleavage occurs directly from the primary intermediate aldehydic species, as a result of which, carbon chain scission products (including CO2) form from very early stages of the reaction. Various strategies such as pooling temperature data to estimate rate ratios prior to full parameter estimation, use of statistical significance tests to reduce model parameters etc have been used to arrive at a minimalistic model still capable of explaining all features of the oxidation Confidence bounds on the model parameters have been estimated The experimental process involved the reaction of 2,3-Dihydroxypropanoic acid(cas: 473-81-4).COA of Formula: C3H6O4

The Article related to glycerol palladium catalyst oxidation kinetics mechanism, Physical Organic Chemistry: Oxidation-Reduction, Including Dehydrogenation and Hydrogenolysis and other aspects.COA of Formula: C3H6O4

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