Category: 111-87-5

Kazmierczak, Kamila published the artcileSupported Cobalt Catalysts for Acceptorless Alcohol Dehydrogenation, Related Products of alcohols-buliding-blocks, the main research area is cobalt catalyst acceptorless alc dehydrogenation; TiO2; acceptorless alcohol dehydrogenation; cobalt; heterogeneous catalysis; supported catalysts.

The acceptor-less dehydrogenation of 2-octanol was tested over cobalt supported on Al2O3, C, ZnO, ZrO2 and various TiO2 substrates. The catalysts were characterized by ICP, XRD and TGA-H2. For Co/TiO2 P25, the effects of passivation, aging (storage at room temperature), and in situ activation under H2 were investigated. The catalysts must be tested shortly after synthesis in order to prevent deactivation. Cobalt supported on TiO2 P25 was the most active and 69% yield of 2-octanone was obtained, using decane as a solvent. Selectivities for 2-octanone were observed in the range of 90% to 99.9%. Small amounts of C16 compounds were also formed due to aldol condensation/dehydration reactions. The catalysts exhibited higher conversion in the dehydrogenation of secondary alcs. (65-69%), in comparison to primary alcs. (2-10%). The dehydrogenation of 1,2-octanediol led to 1-hydroxy-2-octanone, with a selectivity of 90% and 69% for Co/TiO2 P25 and Co/TiO2 P90, resp.

ChemPlusChem published new progress about Aldol condensation. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Azadi, Mehdi published the artcileThe Effect of Dissolved Gases on the Short-Range Attractive Force between Hydrophobic Surfaces in the Absence of Nanobubble Bridging, Product Details of C8H18O, the main research area is force hydrophobic surface gas solubility.

The short-range attractive forces between hydrophobic surfaces are key factors in a wide range of areas such as protein folding, lipid self-assembly, and particle-bubble interaction such as in industrial flotation. Little is certain about the effect of dissolved (well-controlled) gases on the interaction forces, in particular in those systems where the formation of surface nanobubble bridges is suppressed. Here, we probe the short-range attractive force between hydrophobized silica surfaces in aqueous solutions with varying but well-controlled isotherms of gas solubility The first contact approach force measurement method using AFM shows that decreasing gas solubility results in a decrease of the force magnitude as well as shortening of its range. The behavior was found to be consistent across all four aqueous systems and gas solubilities tested. Using numerical computations, we corroborate that attractive force can be adequately explained by a multilayer dispersion force model, which accounts for an interfacial gas enrichment (IGE), that results in the formation of a dense gas layer (DGL) adjacent to the hydrophobic surface. We found that the DGL on the hydrophobic surface is affected only by the concentration of dissolved gases and is independent of the salt type, used to control the gas solubility, which excludes the effect of elec. double-layer interactions on the hydrophobic force.

Langmuir published new progress about Dielectric constant. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Product Details of C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Putra, T. W. published the artcileIntensification of biolubricant synthesis from waste cooking oil using tetrahydrofuran as co-solvent, Quality Control of 111-87-5, the main research area is intensification biolubricant synthesis waste cooking oil THF cosolvent.

In this study, biolubricant was synthesized through two stages of transesterification. The first transesterification was the reaction between waste cooking oil and ethanol using sodium hydroxide as catalyst to produce fatty acid Et esters (FAEE). The second transesterification was the reaction between FAEE and 1-octanol using potassium hydroxide as catalyst with THF as co-solvent to produce fatty acid octyl esters (biolubricant). This study was focused on the effect of THF as co-solvent in the second transesterification. Biolubricant yield of 94.42% was obtained at reaction conditions (temperature of 125°C, time of 180 min, reactant molar ratio of 1:4, catalyst amount of 1%-weight/weight, vacum pressure of 100 mmHg and co-solvent amount of 25%-weight/weight). The physicochem. properties of biolubricant were kinematic viscosities of 10.47 mm2/s and 2.75 mm2/s at 40°C and 100°C, viscosity index of 103 and acid number of 0.62 mg KOH/g.

IOP Conference Series: Materials Science and Engineering published new progress about Edible oils Role: RCT (Reactant), RACT (Reactant or Reagent). 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Quality Control of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Farsang, Evelin published the artcileAnalysis of non-ionic surfactant triton X-100 using hydrophilic interaction liquid chromatography and mass spectrometry, Related Products of alcohols-buliding-blocks, the main research area is Triton X 100 hydrophilic interaction liquid chromatog mass spectrometry; gradient optimization; hydrophilic interaction liquid chromatography; non-ionic surfactant; octylphenol–polyethoxylate.

It is well known that surfactants increase the solubility of hydrophobic organic compounds and cause adverse environmental effects. The removal of these compounds from the contaminated soil or ground-water is particularly difficult due to their water soluble feature. In this work, an ultra-high performance hydrophilic interaction liquid chromatog. method was developed for the separation of oligomers of Triton X-100 octylphenol-polyethoxylate non-ionic surfactant. Liquid chromatog.-mass spectrometry (LC-MS) was used to identify the Triton X-100 compounds There was a 44 mass unit difference between two adjacent peaks that is the molar mass of one ethylene oxide group (-CH2CH2O-). A quadratic retention model was applied for the estimation of retention of the examined non-ionic surfactant and the optimization of gradient elution conditions. The optimized method was suitable for the baseline separation of 28 Triton X-100 oligomers in five minutes.

Molecules published new progress about Hydrophilic interaction liquid chromatographic stationary phases. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Moore, Peter W. published the artcileHydrogen-Bonding Interactions in the Ley-Griffith Oxidation: Practical Considerations for the Synthetic Chemist, HPLC of Formula: 111-87-5, the main research area is aldehyde preparation hydrogen bonding Ley Griffith oxidation primary alc.

The Ley-Griffith oxidation, which is catalyzed by tetra-n-propylammonium perruthenate (TPAP, nPr4N[RuO4]), is a popular method for not only controlled oxidation of primary alcs. to aldehydes, but also a host of other synthetically useful transformations. While the fundamental reaction mechanism has recently been elucidated, several key hydrogen-bonding interactions between the reagents were implicated but not investigated. Herein the prevalence of H-bonding between the co-oxidant N-methylmorpholine N-oxide (NMO), the alc. substrate, water and the perruthenate catalyst is established. These observations help to rationalize the importance of drying the reagents and lead to several practical suggestions.

European Journal of Organic Chemistry published new progress about Aldehydes Role: SPN (Synthetic Preparation), PREP (Preparation). 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, HPLC of Formula: 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lagerspets, Emi published the artcileSchiff base Cu(I) catalyst for aerobic oxidation of primary alcohols, Application of n-Octanol, the main research area is copper Schiff base complex catalyst preparation; aldehyde preparation; alc aerobic oxidation copper Schiff base complex catalyst.

New copper(I)-Schiff base complexes were reported for the selective aerobic oxidation of primary alcs. to aldehydes RCHO [R = (CH2)6, Ph, (CH2)2Ph, etc.] under ambient conditions. Particularly, the copper(I) complex bearing N-(4-fluorophenyl)-1-(furan-2-yl)methanimine showed high activity in the series and gave near- quant. yields in the oxidations of benzyl alc. (99% yield in 1 h) and 1-octanol (96% yield in 24 h). Based on the X-ray structure determination, the complex had a square pyramidal coordination accomplished by two N-(4-fluorophenyl)-1-(furan-2-yl)methanimine ligands and bromide as a counter anion. The oxidation reactions were monitored with UV-vis and in situ ATR-IR spectroscopy to study the changes in the catalytic structure and to elucidate the catalytic properties and the mechanistic details. Accordingly, detachment of one of the N-(4-fluorophenyl)-1-(furan-2-yl)methanimine ligands from the complexes was related to the oxidation activity.

Molecular Catalysis published new progress about Aldehydes Role: SPN (Synthetic Preparation), PREP (Preparation). 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Application of n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yang, Wenjun published the artcileBasic Promotors Impact Thermodynamics and Catalyst Speciation in Homogeneous Carbonyl Hydrogenation, Recommanded Product: n-Octanol, the main research area is promotor thermodn homogeneous catalyst carbonyl hydrogenation.

Homogeneously catalyzed reactions often make use of additives and promotors that affect reactivity patterns and improve catalytic performance. While the role of reaction promotors is often discussed in view of their chem. reactivity, we demonstrate that they can be involved in catalysis indirectly. In particular, we demonstrate that promotors can adjust the thermodn. of key transformations in homogeneous hydrogenation catalysis and enable reactions that would be unfavorable otherwise. We identified this phenomenon in a set of well-established and new Mn pincer catalysts that suffer from persistent product inhibition in ester hydrogenation. Although alkoxide base additives do not directly participate in inhibitory transformations, they can affect the equilibrium constants of these processes. Exptl., we confirm that by varying the base promotor concentration one can control catalyst speciation and inflict substantial changes to the standard free energies of the key steps in the catalytic cycle. Despite the fact that the latter are universally assumed to be constant, we demonstrate that reaction thermodn. and catalyst state are subject to external control. These results suggest that reaction promotors can be viewed as an integral component of the reaction medium, on its own capable of improving the catalytic performance and reshaping the seemingly rigid thermodn. landscape of the catalytic transformation.

Journal of the American Chemical Society published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Recommanded Product: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

He, Xiaochun published the artcileSynthesis of Unsymmetrical N-Heterocyclic Carbene-Nitrogen-Phosphine Chelated Ruthenium(II) Complexes and Their Reactivity in Acceptorless Dehydrogenative Coupling of Alcohols to Esters, Formula: C8H18O, the main research area is tridentate phosphinophenyliminoimidazolylidene chelated ruthenacycle preparation catalyst dehydrogenative coupling alc; crystal structure tridentate phosphinophenyliminoimidazolylidene chelated ruthenacycle; mol structure tridentate phosphinophenyliminoimidazolylidene chelated ruthenacycle; ester preparation.

Two novel Ru complexes RuH(CO)Cl(PPh3)(κ2-CP) (1) and [fac-RuH(CO)(PPh3)(κ3-CNP)]Cl (2) bearing unsym. N-heterocyclic carbene-N-phosphine (CNP) were synthesized and characterized with 1H NMR, 31P NMR, and HRMS. The structure of complex 2 was further confirmed by single-crystal x-ray diffraction. An anion exchange experiment proved that complex 2 could transform into complex 1 in solution The two complexes exhibited a highly catalytic performance in acceptorless dehydrogenative coupling of alcs. to esters, and the excellent isolated yields of esters were given in a catalyst loading of 1% for para- and meta-substituted benzyl alcs. and long-chain primary alcs. Although some ortho-substituted benzyl alcs. displayed a relatively low reactivity due to the steric hindrance and the coordination of electron donor with the Ru center, the good product yields were still obtained by prolonging the reaction time. Especially, this system successfully realized the dehydrogenative cross-coupling to esters between two different primary alcs.

Organometallics published new progress about Aralkyl alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Formula: C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Fang, L. published the artcileNanoceria-promoted low Pd-Ni catalyst for the synthesis of secondary amines from aliphatic alcohols and ammonia, Synthetic Route of 111-87-5, the main research area is nanoceria palladium nickel catalyst secondary amine aliphatic alc ammonia.

This paper describes the preparation of bimetallic Pd-Ni catalysts supported over nanoceria with very low Ni and Pd loading (<0.5%) for the direct amination of aliphatic alcs. with NH3. Different metal impregnation methods were used for engineering the interaction between Pd, Ni and nanoceria. The as-prepared catalysts were characterized in detail by combining XRD, H2-TPR, H2-TPD, STEM-EDS-SDD and XPS. The sequence of impregnation of both metals and the Pd loading affected to an important extent the catalytic activity by conditioning the crystallite size and the Pd and Ni speciation, as well as the reducibility and reversible H2 storage properties. By optimizing the preparation protocols, a 0.5% Pd-0.5% Ni-Pd/CeO2 formulation prepared by sequential impregnation of the Ni and Pd precursors afforded 80% yield of dioctylamine at almost full conversion [TON = 1160 mmol per mmol (Ni + Pd)surface] in the direct amination reaction of 1-octanol with NH3 at 180° for 2 h. Metal leaching during the reaction could be completely avoided. The high catalytic performance of Pd-Ni induced by nanoceria places this catalyst among the best ever reported catalysts for the synthesis of secondary amines. Catalysis Science & Technology published new progress about Aliphatic alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Synthetic Route of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Liu, Hui-Min published the artcileDehydrogenation of Alcohols to Carboxylic Acid Catalyzed by in Situ-Generated Facial Ruthenium-CPP Complex, Related Products of alcohols-buliding-blocks, the main research area is carboxylic acid preparation dehydrogenation alcs facial Ruthenium phosphine catalyst.

A selective catalytic system for the dehydrogenation of primary alcs. to carboxylic acids using a facial ruthenium complex generated in situ from the [Ru(COD)Cl2]n and a hybrid N-heterocyclic carbene (NHC)-phosphine-phosphine ligand (CPP) has been first reported. The facial coordination model was unveiled by NMR anal. of the reaction mixture Such a fac-ruthenium catalyst system exhibited high catalytic activity and stability, and a high turnover number of 20 000 could be achieved with catalyst loading as low as 0.002 mol %. The exceedingly high catalyst stability was tentatively attributed to both the anchoring role of NHC and the hemi-lability of phosphines. The catalytic system also features a wide substrate scope. In particular, the facial coordination of CPP ligands was found to be beneficial for sterically hindered alcs., and ortho-substituted benzylic alcs. and bulky adamantanyl methanol as well as cholesterol were all found to be viable dehydrogenation substrates.

Journal of Organic Chemistry published new progress about Benzoic acids Role: SPN (Synthetic Preparation), PREP (Preparation). 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts