Month: December 2022

Jozwiak, Malgorzata published the artcileCompression of selected glymes in N,N-dimethylformamide + water. The hydration numbers and hydrophobic hydration process of glymes, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, the main research area is glyme DMF water hydrophobic hydration number compression process.

This paper presents the speed of sound in selected glymes (monoglyme, diglyme, triglyme and tetraglyme) in N,N-dimethylformamide + water mixed solvent at four temperatures: 293.15 K, 298.15 K, 303.15 K and 308.15 K. The data obtained were used to calculate the values of isentropic compressibility (κS) of glymes solutions and apparent molar isentropic compression (KS,Φ,m), as well as the limiting partial molar isentropic compression (K0S,m) of glymes in the mixed solvent (DMF + W). Changes in the obtained values of the physicochem. parameters, as functions of temperature or mole fraction of water in the mixed solvent, were analyzed in terms of the mol. interactions and structural differentiation of the investigated systems. The hydrophobic hydration process of the studied glymes is visible in the high water content area of the mixed solvent. The hydration number of glymes in water at four temperatures was calculated and analyzed.

Journal of Molecular Liquids published new progress about Compression. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Robba, A. published the artcileFingerprinting Mean Composition of Lithium Polysulfide Standard Solutions by Applying High-Energy Resolution Fluorescence Detected X-ray Absorption Spectroscopy, Safety of 2,5,8,11,14-Pentaoxapentadecane, the main research area is lithium sulfur battery polysulfide solution x ray absorption spectroscopy.

In a lithium/sulfur (Li/S) battery, the reduction of sulfur during discharge involves a particular mechanism, where the active material successively dissolves into the electrolyte to form lithium polysulfide intermediate species (Li2Sx), with x being a function of the state of charge. In this work, sulfur K-edge resonant inelastic X-ray scattering measurements were performed for the characterization of different Li2Sx polysulfide standard solutions High-energy resolution fluorescence detected X-ray absorption spectroscopy allowed clear separation the pre-edge absorption peak corresponding to terminal sulfur atoms from the main absorption peak due to internal atoms and allowed quant. evaluation of the evolution of the peak area ratio as a function of the polysulfide chain length. Results of this exptl. work demonstrate that the normalized area of the pre-edge is a reliable fingerprint of the Li2Sx mean chain length in agreement with recent theor. predictions. As a perspective, this work confirms that operando HERFD XAS can be used to differentiate mean polysulfide composition, which is key issue in the characterization of Li/S cells.

Journal of Physical Chemistry Letters published new progress about Composition. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Safety of 2,5,8,11,14-Pentaoxapentadecane.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Stjerndahl, Maria published the artcileCleavable Surfactants: A Comparison between Ester, Amide, and Carbonate as the Weak Bond, Name: 2,5,8,11-Tetraoxatridecan-13-ol, the main research area is ester amide carbonate hydrolysis gemini cleavable surfactant property.

Cleavable surfactants, i.e., surfactants in which a weak bond has deliberately been inserted into the mol., are of interest when remaining surface-active material at a surface can cause problems. Ester and amide bonds are established as week linkages in surfactants but these generate an acid when they hydrolyze. For some applications, acidic degradation products are unwanted. Surfactants with a carbonate bond between the polar headgroup and the hydrophobic tail are of interest for such purposes. In this article, we compare the phys.-chem. properties of nonionic carbonate surfactants with those of the corresponding ester and amide surfactants. The half-lives of the different cleavable surfactants are also compared and it was found that a carbonate bond is slightly more stable to alk. hydrolysis than an ester bond when present in otherwise identical structures. A nonionic gemini surfactant with a carbonate bond in the spacer, which on hydrolysis decomposes into two identical single-tailed nonionic amphiphiles, is also presented. The hydrolysis kinetics for this surfactant was studied in some detail and it was found that it degrades much faster at low temperature than at higher temperature This anti-Arrhenius type of hydrolysis kinetics is proposed to be due to the reverse solubility vs. temperature behavior of ethoxylated surfactants.

Journal of Surfactants and Detergents published new progress about Cloud point. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Name: 2,5,8,11-Tetraoxatridecan-13-ol.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Li, Jia published the artcileBoron-doped carbon microspheres as a new catalyst for rechargeable Li-CO2 batteries, Synthetic Route of 143-24-8, the main research area is boron doped carbon microsphere lithium battery electrochem property.

Li-CO2 batteries are thought to be a promising technol. for it can combine storing energy with mitigating the “”greenhouse effect””. However, CO2 electrochem. reduction reaction is known to be a kinetically sluggish one. Therefore, researchers are committed to exploring catalysts with high catalytic activity to drive the reaction. In this study, boron-doped carbon microspheres (B-CMs) with mesoporous structure and large sp. surface area were prepared using one-step impregnation followed by calcination. Active sites are increased by the pos. charged boron atoms in B-CMs, thus, endowing higher catalytic performance for Li-CO2 batteries. The Li-CO2 battery with B-CMs cathode exhibited excellent performance, delivering a high discharge capacity of 17,429 and 11,975 at the c.d. of 200 and 500 resp., and can stably run 90 cycles at the c.d. of 200 with a limited capacity of 1000.

Fullerenes, Nanotubes, and Carbon Nanostructures published new progress about Calcination. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Synthetic Route of 143-24-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Dziaduszek, Jerzy published the artcileAnorectal drug products for over-the-counter human use; final monograph, Synthetic Route of 637-58-1, the publication is Federal Register (1990), 55(150), 31776-83, database is CAplus.

Active ingredients and permitted combinations of active ingredients in over-the-counter anorectal products for external or intrarectal administration are given under the Federal Food, Drug, and Cosmetic Act. Classes of active ingredients include anesthetics, vasoconstrictors, protectants, analgesics, antipruritics, astringents, and keratolytics. Labeling of anorectal drug products is also considered.

Federal Register published new progress about 637-58-1. 637-58-1 belongs to ethers-buliding-blocks, auxiliary class Inhibitor, name is 4-(3-(4-Butoxyphenoxy)propyl)morpholine hydrochloride, and the molecular formula is C13H8BrIN2O2S, Synthetic Route of 637-58-1.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Flores-Alamo, Marcos published the artcileAnorectal drug products for over-the-counter human use; tentative final monograph, COA of Formula: C17H28ClNO3, the publication is Federal Register (1988), 53(157), 30756-84, database is CAplus.

Components of over-the-counter anorectal products suitable for external (topical) or intrarectal administration and allowed combinations of active ingredients and their labeling are given under the Federal Food, Drug, and Cosmetic Act. Classes of active ingredients include: local anesthetics, vasoconstrictors, protectants, analgesics, anesthetics, antipruritics, astringents, and/or keratolytic agents.

Federal Register published new progress about 637-58-1. 637-58-1 belongs to ethers-buliding-blocks, auxiliary class Inhibitor, name is 4-(3-(4-Butoxyphenoxy)propyl)morpholine hydrochloride, and the molecular formula is C12H10BFO3, COA of Formula: C17H28ClNO3.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Papez, Maja published the artcileAnorectal drug products for over-the-counter human use, Formula: C17H28ClNO3, the publication is Federal Register (2003), 68(165), 51167-51170, database is CAplus.

The Food and Drug Administration (FDA) is issuing, under the Federal Food, Drug, and Cosmetic Act, a final rule establishing that any over-the-counter (OTC) drug product containing a combination of hydrocortisone and pramoxine hydrochloride (HCl) for anorectal use is not generally recognized as safe and effective and is misbranded. This combination product is not currently marketed OTC. This final rule discusses data on the combination of hydrocortisone and pramoxine HCl that were still under review when an earlier final rule on OTC anorectal drug products was issued. This rule is part of FDA’s ongoing review of OTC drug products.

Federal Register published new progress about 637-58-1. 637-58-1 belongs to ethers-buliding-blocks, auxiliary class Inhibitor, name is 4-(3-(4-Butoxyphenoxy)propyl)morpholine hydrochloride, and the molecular formula is C10H13NO2, Formula: C17H28ClNO3.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Yeh, S. Y. published the artcileN-depyridination and N-dedimethylaminoethylation of tripelennamine and pyrilamine in the rat. New metabolic pathways, Application In Synthesis of 52818-63-0, the publication is Drug Metabolism and Disposition (1990), 18(4), 453-61, database is CAplus and MEDLINE.

N-(2-Dimethylaminoethyl)benzylamine and 2-benzylaminopyridine were identified as two new urinary metabolites of tripelennamine in the rat by GC/MS. 2-(4-Methoxybenzylamino)-pyridine and N-(dimethylaminoethyl)-4-hydroxybenzylamine were identified as new urinary metabolites of pyrilamine by GC/MS. Thus, in addition to N– and O-demethylation, hydroxylation, and glucuronidation, N-debenzylation, N-depyridination and N-dedimethylaminoethylation were shown to be novel pathways for metabolism of tripelennamine and pyrilamine. The mechanism for N-depyridination and N-dealkylation is discussed.

Drug Metabolism and Disposition published new progress about 52818-63-0. 52818-63-0 belongs to ethers-buliding-blocks, auxiliary class Pyridine,Amine,Benzene,Ether, name is N-(4-Methoxybenzyl)pyridin-2-amine, and the molecular formula is C3H5F3O, Application In Synthesis of 52818-63-0.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Williams, D. Lyn H. published the artcileS-Nitrosation of thiourea and thiocyanate ion. Nitrosyl thiocyanate and the S-nitroso-adduct of thiourea as nitrosating agents, Application In Synthesis of 14807-75-1, the publication is Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999) (1977), 128-32, database is CAplus.

The reaction between H2NCSNH2 (I) and PhN(Me)NO (II) in aqueous acid solution gave PhNHMe (III) and a S-nitroso intermediate (IV) which decomposed to form [(H2N)2C+S]2. The latter two products are the same as those from the reaction of I and HNO2. The nitrosoamine reaction was acid-catalyzed and was first order in both I and II. Added III reduced the reaction rate, showing that the formation of IV was reversible, i.e. it was capable of acting directly as a nitrosating agent. The reactivities (relative to III) of ‘various nitrite’ traps (NH3, H2NN+H3, H2NSO3H, H3N+OH, urea) towards IV were determined, the order of reactivity was the same as for the nitrosating agents NOCl, NOBr, and H2N+O2, but discrimination by IV was greater than for these, implying that IV is a less reactive species. Rate constant ratios obtained for NOSCN are similar to those of IV suggesting that they have almost the same reactivity as nitrosating agents.

Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999) published new progress about 14807-75-1. 14807-75-1 belongs to ethers-buliding-blocks, auxiliary class Salt,Thiourea,Amine,Aliphatic hydrocarbon chain, name is Formamidine disulfide dihydrochloride, and the molecular formula is C8H11BO2, Application In Synthesis of 14807-75-1.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Wheatley, P. J. published the artcileCrystallography of some cyanine dyes, Product Details of C2H8Cl2N4S2, the publication is Journal of the Chemical Society (1959), 3245-50, database is CAplus.

The cell constants and space groups of some cyanine dyes and their solvates were determined The structure of the unsolvated dye 3,3′-diethylthiacarbocyanine bromide was elucidated from 2 projections. The cation is planar with the conjugated chain in the extended form. The S atoms are cis with respect to this chain. Some curious properties of the crystals are described. The results of the structure determination are correlated with other properties of cyanine dyes.

Journal of the Chemical Society published new progress about 14807-75-1. 14807-75-1 belongs to ethers-buliding-blocks, auxiliary class Salt,Thiourea,Amine,Aliphatic hydrocarbon chain, name is Formamidine disulfide dihydrochloride, and the molecular formula is C8H10O2, Product Details of C2H8Cl2N4S2.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem