Category: 64519-82-0

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 64519-82-0, Name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, molecular formula is C12H24O11. In an article, author is Wang, Feng,once mentioned of 64519-82-0, Application In Synthesis of (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol.

Probing Intramolecular Interaction of Stereoisomers Using Computational Spectroscopy

Several model stereoisomers such as ferrocene (Fc), methoxyphenol, and furfural conformers are discussed. It was discovered that the Fc IR spectroscopic band(s) below 500cm(-1) serve as fingerprints for eclipsed (splitting 17 (471-488)cm(-1)) and staggered Fc (splitting is similar to 2 (459-461)cm(-1)) in the gas phase. It is revealed that in the gas phase the dominance of the eclipsed Fc (D-5h) at very low temperatures changes to a mixture of both eclipsed and staggered Fc when the temperature increases. However, in solvents such as CCl4, eclipsed Fc dominates at room temperature (300K) due to the additional solvation energy. Intramolecular interactions of organic model compounds such as methoxyphenols (guaiacol (GUA) and mequinol (MEQ)) and furfural, ionization energies such as the carbon 1s (core C1s), as well as valence binding energy spectra serve this purpose well. Hydrogen bonding alters the C1s binding energies of the methoxy carbon (C-(7)) of anti-syn and anti-gauche conformers of GUA to 292.65 and 291.91eV, respectively. The trans and cis MEQ conformers, on the other hand, are nearly energy degenerate, whereas their dipole moments are significantly different: 2.66 Debye for cis and 0.63 Debye for trans-MEQ. Moreover, it is found that rotation around the C-ring-OH and the C-ring-OCH3 bonds differ in energy barrier height by similar to 0.50 kcal.mol(-1). The Dyson orbital momentum profiles of the most different ionic states, 25a ‘ (0.35eV) and 3a ‘ (-0.33eV), between cis and trans-MEQ in outer valence space (which is measurable using electron momentum spectroscopy (EMS)), exhibit quantitative differences. Finally, the molecular switch from trans and cis-furfural engages with a small energy difference of 0.74 kcal mol(-1), however, at the calculated C-(3)(-H center dot center dot center dot O=C) site the C1s binding energy difference is 0.105eV (2.42 kcal mol(-1)) and the NMR chemical shift of the same carbon site is also significant; 7.58ppm from cis-furfural without hydrogen bonding.

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Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics

Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. In an article, author is Zhang, Junfeng, once mentioned the application of 64519-82-0, Name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, molecular formula is C12H24O11, molecular weight is 344.31, MDL number is MFCD00190708, category is Tetrahydropyrans. Now introduce a scientific discovery about this category, SDS of cas: 64519-82-0.

Ionomer dispersion solvent influence on the microstructure of Co-N-C catalyst layers for anion exchange membrane fuel cell

The controllable fabrication of non-precious metal cathode catalyst layer (CCL) to improve the water management is crucial to the performance of anion exchange membrane fuel cells (AEMFCs). Due to the higher porosity and larger particle size of M-N-C (M = Co, Fe) catalysts, compared with commercial Pt/C catalysts, the M-N-C layer is more complex. Here, we study the influence of solvent dispersion on the microstructure of Co-N-C CCLs. The solvent dielectric constants determine the aggregate size, while the relative volatilization rate dominates the final pore structure. The Co-N-C aggregate size in methanol is approximately two times larger than that in tetrahydrofuran or isopropanol. An interesting phenomenon is that ionomer tends to migrate and coalesce because of height differences in the CCL, demonstrating the importance of fast consolidation for achieving a homogenous ionomer distribution. By using ink containing tetrahydrofuran, the membrane electrode assembly from the Co-N-C CCL exhibits higher water adsorption ability in comparison with those using methanol, pmpanol, or isopmpanol solvents, leading to a power density of 181.7 mW cm(-2) at 50 degrees C, assembled with a commercial FAA-3-20 membrane. We anticipate our results can guide the design of Co-N-C CCLs with improved microstructure to achieve high performance AEMFCs.

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Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics

64519-82-0, Name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, molecular formula is C12H24O11, belongs to Tetrahydropyrans compound, is a common compound. In a patnet, author is Lange, Jean-Paul, once mentioned the new application about 64519-82-0, Quality Control of (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol.

Furfural to 1,4-Butanediol/Tetrahydrofuran – A Detailed Catalyst and Process Design

The feasibility to convert furan, a direct derivative of furfural, to a mixture of 1,4-butanediol (BDO) and tetrahydrofuran (THF) is demonstrated with industrially acceptable performances using mm-sized pellets of a carbon-supported RePd catalyst for 2000 h of operation. The reaction schemes were unraveled by spiking potential reaction intermediates and a full kinetic model was developed. Finally, we developed a comprehensive process flow scheme that integrates the conversion of furfural to furan, the recovery and purification of furan, its reductive hydration to BDO/THF as well as the recovery and purification of BDO and THF. This process concept appears economically viable at current furfural, BDO and THF market prices.

If you¡¯re interested in learning more about 64519-82-0. The above is the message from the blog manager. Quality Control of (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol.

Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics

Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 64519-82-0, Name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol. In a document, author is Chatani, Naoto, introducing its new discovery. Recommanded Product: 64519-82-0.

Co-2(CO)(8)-Catalyzed Reactions of Acetals or Lactones with Hydrosilanes and Carbon Monoxide. A New Access to the Preparation of 1,2-Diol Derivatives through Siloxymethylation

The Co-2(CO)(8)-catalyzed reaction of acetals with hydrosilanes and CO under mild reaction conditions (an ambient temperature under an ambient CO pressure), leading to the production of vicinal diols is reported. A siloxymethyl group can be introduced via the cleavage of one of two alkoxy groups in the acetal. The effects of the types of hydrosilanes, acetals, solvents, and reaction temperatures on the yield of siloxymethylation products were examined in detail. The reactivity for hydrosilanes is as follows; HSiMe3 > HSiEtMe2 > HSiEt2Me > HSiEt3. Hemiacetal esters are more reactive than dimethyl acetals. The polarity of the solvent used also has a significant effect on both the course of the reaction as well as the reaction rate. The site-selective siloxymethylation can be achieved in the case of cyclic acetals such as tetrahydrofuran (THF) and tetrahydropyrane (THP) derivatives, depending on the nature of the oxygen substituent attached adjacent to the oxygen atom in the ring. When 2-alkoxy THF or THP derivatives are used as substrates, the siloxymethylation takes place with cleavage of the ring C-O bond. In contrast, the reaction of 2-acetoxy THF or THP derivatives results in siloxymethylation with the cleavage of C-OAc bond. The ring-opening siloxymethylation of lactones was also examined.

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Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics

Synthetic Route of 64519-82-0, Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. 64519-82-0, Name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, SMILES is OCC(O)[C@@H](O)[C@H](O)[C@H](O)CO[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1, belongs to Tetrahydropyrans compound. In a article, author is Huang, Hui, introduce new discover of the category.

Thiamine-Mediated Cooperation Between Auxotrophic Rhodococcus ruber ZM07 and Escherichia coli K12 Drives Efficient Tetrahydrofuran Degradation

Tetrahydrofuran (THF) is a universal solvent widely used in the synthesis of chemicals and pharmaceuticals. As a refractory organic contaminant, it can only be degraded by a small group of microbes. In this study, a thiamine auxotrophic THF-degrading bacterium, Rhodococcus ruber ZM07, was isolated from an enrichment culture H-1. It was cocultured with Escherichia coli K12 (which cannot degrade THF but can produce thiamine) and/or Escherichia coli K12 Delta thiE (which can neither degrade THF nor produce thiamine) with or without exogenous thiamine. This study aims to understand the interaction mechanisms between ZM07 and K12. We found that K12 accounted for 30% of the total when cocultured and transferred with ZM07 in thiamine-free systems; in addition, in the three-strain (ZM07, K12, and K12 Delta thiE) cocultured system without thiamine, K12 Delta thiE disappeared in the 8th transfer, while K12 could still stably exist (the relative abundance remained at approximately 30%). The growth of K12 was significantly inhibited in the thiamine-rich system. Its proportion was almost below 4% after the fourth transfer in both the two-strain (ZM07 and K12) and three-strain (ZM07, K12, and K12 Delta thiE) systems; K12 Delta thiE’s percentage was higher than K12’s in the three-strain (ZM07, K12, and K12 Delta thiE) cocultured system with exogenous thiamine, and both represented only a small proportion (less than 1% by the fourth transfer). The results of the coculture of K12 and K12 Delta thiE in thiamine-free medium indicated that intraspecific competition between them may be one of the main reasons for the extinction of K12 Delta thiE in the three-strain (ZM07, K12, and K12 Delta thiE) system without exogenous thiamine. Furthermore, we found that ZM07 could cooperate with K12 through extracellular metabolites exchanges without physical contact. This study provides novel insight into how microbes cooperate and compete with one another during THF degradation.

Synthetic Route of 64519-82-0, The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 64519-82-0 is helpful to your research.

Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics

Chemistry, like all the natural sciences, SDS of cas: 64519-82-0, begins with the direct observation of nature¡ª in this case, of matter.64519-82-0, Name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, SMILES is OCC(O)[C@@H](O)[C@H](O)[C@H](O)CO[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1, belongs to Tetrahydropyrans compound. In a document, author is Wong, Jia Chyi, introduce the new discover.

Seventeen-Armed Star Polystyrenes in Various Molecular Weights: Structural Details and Chain Characteristics

Star-shaped polymers are very attractive because of their potential application ability in various technological areas due to their unique molecular topology. Thus, information on the molecular structure and chain characteristics of star polymers is essential for gaining insights into their properties and finding better applications. In this study, we report molecular structure details and chain characteristics of 17-armed polystyrenes in various molecular weights: 17-Arm(2k)-PS, 17-Arm(6k)-PS, 17-Arm(10k)-PS, and 17-Arm(20k)-PS. Quantitative X-ray scattering analysis using synchrotron radiation sources was conducted for this series of star polymers in two different solvents (cyclohexane and tetrahydrofuran), providing a comprehensive set of three-dimensional structure parameters, including radial density profiles and chain characteristics. Some of the structural parameters were crosschecked by qualitative scattering analysis and dynamic light scattering. They all were found to have ellipsoidal shapes consisting of a core and a fuzzy shell; such ellipse nature is originated from the dendritic core. In particular, the fraction of the fuzzy shell part enabling to store desired chemicals or agents was confirmed to be exceptionally high in cyclohexane, ranging from 74 to 81%; higher-molecular-weight star polymer gives a larger fraction of the fuzzy shell. The largest fraction (81%) of the fuzzy shell was significantly reduced to 52% in tetrahydrofuran; in contrast, the lowest fraction (19%) of core was increased to 48%. These selective shell contraction and core expansion can be useful as a key mechanism in various applications. Overall, the 17-armed polystyrenes of this study are suitable for applications in various technological fields including smart deliveries of drugs, genes, biomedical imaging agents, and other desired chemicals.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions. you can also check out more blogs about 64519-82-0. SDS of cas: 64519-82-0.

Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics

Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology. 64519-82-0, Name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, molecular formula is , belongs to Tetrahydropyrans compound. In a document, author is Veluswamy, Hari Prakash, SDS of cas: 64519-82-0.

Macroscopic Kinetic Investigations on Mixed Natural Gas Hydrate Formation for Gas Storage Application

Solidified natural gas (SNG) technology via clathrate hydrates is a promising technology for the long-term and large-scale storage of natural gas, owing to multifaceted benefits offered, including environmentally benign, compact, and safest mode of gas storage in comparison to conventional methods. In this study, we investigate the macroscopic kinetics of natural gas hydrate formation using a Cl (93%)-C2 (5%)-C3 (2%) gas mixture. The main objective is to examine the effect of the presence of low concentrations of higher hydrocarbons (ethane and propane) in influencing the natural gas hydrate formation kinetics along with the additional presence of a thermodynamic promoter, tetrahydrofuran. Experiments were performed to study the effect of pressure (driving force) on the mixed natural gas hydrate formation kinetics in an unstirred reactor configuration. Plausibility of the improvement in kinetics of mixed natural gas hydrate formation in the presence of an amino acid (kinetic promoter) was also attempted. Concentration of 300 ppm of tryptophan was found to be effective in enhancing the mixed natural hydrate formation kinetics at experimental conditions of 283.2 K and 5.0 MPa, albeit a minor drop in gas uptake. Results from this study will be helpful in advancing the SNG technology toward commercial implementation.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 64519-82-0, in my other articles. SDS of cas: 64519-82-0.

Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics

In an article, author is Lu, Yunfan, once mentioned the application of 64519-82-0, Name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, molecular formula is C12H24O11, molecular weight is 344.31, MDL number is MFCD00190708, category is Tetrahydropyrans. Now introduce a scientific discovery about this category, Formula: C12H24O11.

Preparation of dimer acid-based polyamide film by solution casting method and its properties optimization

The dimer acid-based polyamide (DAPA) was prepared by polymerization of dimer acid and ethylenediamine. And the film was prepared by the solution casting method, in which tetrahydrofuran was used as the solvent. Glycerol is introduced into the film by adding glycerol together with tetrahydrofuran and smearing it on the glassware before the film’s formation. The paper has evaluated the DAPA film packaging performance, which has rarely been studied, such as oxygen barrier property and optical properties. Through forming the film by the two means of adding glycerol, the paper has studied its property on the mechanic, morphology, oxygen barrier. The results of which show the differentiation of producing film in two ways. The tensile strength and elongation at break were increased by 80% and 228%. And the oxygen permeability was 0.00732 cm(2)/m(2).dpa. The thermal processability of the film has been improved. Compared with other bio-based film, the DAPA film with glycerol solution has excellent mechanical properties, barrier property, and optical properties.

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Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics

Electric Literature of 64519-82-0, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 64519-82-0, Name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, SMILES is OCC(O)[C@@H](O)[C@H](O)[C@H](O)CO[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1, belongs to Tetrahydropyrans compound. In a article, author is Kampars, Valdis, introduce new discover of the category.

Interesterification of rapeseed oil with methyl acetate in the presence of potassium tert-butoxide solution in tetrahydrofuran

Production of biodiesel (FAME) via transesterification of triglycerides with methanol in the presence of basic catalysts has largely increased over time despite the low value of the by-product glycerol. Interesterification of the same feedstock with methyl acetate allows to obtain biofuel with higher yield, as the by-product of this reaction, i.e. triacetin, can be included into the fuel composition. Investigation of interesterification with methyl acetate to oil molar ratio 18 at 55 degrees C during 1 h in presence of potassium tert-butoxide solution in tetrahydrofuran shows that after catalyst to oil molar ratio 0.1 slow increase of FAME and a decrease of triacertin content occur. Variation of catalyst to oil molar ratio does not allow to lower the content of intermediates below 19 wt%. An increase of methyl acetate to oil molar ratio from 18 to 65 reduces the mass fraction of intermediates to 9.5% and FAME to triacetin mass ratio to 5.2. The fuel characteristics of obtained products are close to or comply with the requirements of LVS EN 14214, excluding the requirements for FAME and intermediate content and density. The optimal region of methyl acetate to oil molar ratio as the reasonable compromise between the yield of the target products and removable excess of reactant could be from 24 to 40. (C) 2020 Published by Elsevier Ltd.

Electric Literature of 64519-82-0, The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 64519-82-0 is helpful to your research.

Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics

In an article, author is Hochma, Efrat, once mentioned the application of 64519-82-0, Formula: C12H24O11, Name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, molecular formula is C12H24O11, molecular weight is 344.31, MDL number is MFCD00190708, category is Tetrahydropyrans. Now introduce a scientific discovery about this category.

Dielectric behavior of thin films of unsaturated polyester-resin/carbon nanotube semiconductor composites

Since the discovery of carbon nanotubes (CNT), numerous studies have focused on the development of materials combining CNT with polymer composites to exploit both CNT’s remarkable characteristics and the complimentary properties of polymer thin films. In particular, unsaturated polyester resin (UPR) and CNT composite materials have not been studied before. Here we develop and characterize a UPR/CNT-based capacity resistor gas sensor and apply it on THF vapor. The CNT’s high aspect ratio provides the composite with better electrical and mechanical performance than other realizations, such as carbon black. We identify and quantify THF in a wide range of operation frequencies, under SATP conditions, as functions of the vertical distance, sample volume and operation frequency. High sensitivity, reversibility and fast response to the dielectric vapor exposure in microliter volumes are achieved. The results are also analyzed in terms of the possible mechanisms relating to THF/sensor interactions, with good correspondence between the model and measured data.

If you are interested in 64519-82-0, you can contact me at any time and look forward to more communication. Formula: C12H24O11.

Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics