Category: 33100-27-5

《Chalcogen Bonding of SO2 and s-Block Metal Iodides Near Room Temperature: A Remarkable Structural Diversity》 was published in European Journal of Inorganic Chemistry in 2020. These research results belong to Dankert, Fabian; Feyh, Anne; von Haenisch, Carsten. Electric Literature of C10H20O5 The article mentions the following:

In this contribution the authors have systematically explored the coordination chem. of the iodide anion towards SO2. While employing large organocations like s-block metal complexes of crown-ethers, the authors discovered a remarkable structural diversity within the herein characterized compounds together with novel architectures of SO2 solvates. The observed O2S···I- interactions are strong enough to determine the crystal packing and dimensionality. In the light of chalcogen bonding, the small mol. SO2 is introduced as a supramol. synthon. In the light of a chem. in non-aqueous solutions, the ISO2- anion is revisited. Chalcogen bonding was established to form one-dimensional networks in the compounds [Li([12]crown-4)H2O]I·SO2 (1), [Na([15]crown-5)(SO2)I] (2), [K([18]crown-6)(SO2)I] (4), [NH4([18]crown-6)]I·SO2 (5), [Rb([18]crown-6)I(SO2)]·2SO2 (6) and [Cs([18]crown-6)(SO2)2I] (7) all of which were obtained by 1:1 complexation of the resp. iodide salt and resp. crown-ether in SO2 solution Two-dimensional networks were obtained within the alk. earth metal compounds [Mg([12]crown-4)2]I2·4SO2 (9) and [Ba2([18]crown-6)2(SO2I)(SO2)2I3]·SO2 (11). The iodosulfite ion ISO2- was obtained either by shielding Na+ ions with [12]crown-4, conversion of MgI2 with [15]crown-5, conversion of CaI2 with [18]crown-6 or conversion of BaI2 with [18]crown-6 (11, as aforementioned). [Na([12]crown-4)2]ISO2 (3), [Mg([15]crown-5)(ISO2)2] (8) and [Ca2([18]crown-6)(SO2I)3]I3 (10) were characterized. In these resp. compounds the S···I atom distances are considerably shorter than those previously reported. Exptl. data around the chem. of halosulfites is provided. Besides network structures and the iodosulfite formation, an SO2-rich aggregate could be observed An SO2 adduct of the composition [I2(SO2)5]2- is present in [Na([12]crown-4)2]I·2.75SO2 (3a). After reading the article, we found that the author used 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Electric Literature of C10H20O5)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Electric Literature of C10H20O5

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

《Quantum Chemical Modeling of the Adsorption of Crown Ethers of Different Structures on Surfaces of Lithium and Carbon》 was published in Russian Journal of Physical Chemistry A in 2020. These research results belong to Tulibaeva, G. Z.; Yarmolenko, O. V.; Shestakov, A. F.. Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane The article mentions the following:

Abstract: Theor. studies are performed of the adsorption of crown ethers of different structures (15-crown-5, dibenzo-18-crown-6 and 3-pentadecyl-2,4-dioxo-16-crown-5) on surfaces of lithium and carbon, the main anode materials in secondary lithium power sources. The energies of adsorption of these crown ethers and the bonding energies of lithium ions with crown ether in the free and adsorbed states are calculated using the PBE d. functional. It is shown that the mols. of 15-crown-5 and 3-pentadecyl-2,4-dioxo-16-crown-5 form flat structures, contributing to the stack folding of subsequent crown ether mols. There are steric hindrances for dibenzo-18-crown-6, since one of the benzene rings is oriented perpendicularly. It is found that 3-pentadecyl-2,4-dioxo-16-crown-5 promotes the transfer of lithium ion from the electrolyte volume to the surface of both lithium and carbon better than the other two crown ethers. In the experiment, the researchers used many compounds, for example, 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane

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

《Quantum Chemical Modeling of the Adsorption of Crown Ethers of Different Structures on Surfaces of Lithium and Carbon》 was published in Russian Journal of Physical Chemistry A in 2020. These research results belong to Tulibaeva, G. Z.; Yarmolenko, O. V.; Shestakov, A. F.. Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane The article mentions the following:

Abstract: Theor. studies are performed of the adsorption of crown ethers of different structures (15-crown-5, dibenzo-18-crown-6 and 3-pentadecyl-2,4-dioxo-16-crown-5) on surfaces of lithium and carbon, the main anode materials in secondary lithium power sources. The energies of adsorption of these crown ethers and the bonding energies of lithium ions with crown ether in the free and adsorbed states are calculated using the PBE d. functional. It is shown that the mols. of 15-crown-5 and 3-pentadecyl-2,4-dioxo-16-crown-5 form flat structures, contributing to the stack folding of subsequent crown ether mols. There are steric hindrances for dibenzo-18-crown-6, since one of the benzene rings is oriented perpendicularly. It is found that 3-pentadecyl-2,4-dioxo-16-crown-5 promotes the transfer of lithium ion from the electrolyte volume to the surface of both lithium and carbon better than the other two crown ethers. In the experiment, the researchers used many compounds, for example, 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane

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

The author of 《Mechanism of ε-caprolactone polymerization in the presence of alkali metal salts: investigation of initiation course and determination of polymers structure by MALDI-TOF mass spectrometry》 were Grobelny, Zbigniew; Golba, Sylwia; Jurek-Suliga, Justyna. And the article was published in Polymer Bulletin (Heidelberg, Germany) in 2019. Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane The author mentioned the following in the article:

Various alkali metal salts were applied as initiators for ε-caprolactone anionic ring-opening polymerization in THF at room temperature It was observed that potassium methoxide (MeOK), potassium isopropoxide (i-PrOK) and potassium tert-butoxide (t-BuOK) nonactivated or activated by 18-crown-6 (18C6) initiated polymerization mainly by deprotonation of the monomer. In the case of potassium hydride (KH), its basicity increased with the ability of the ligand for cation complexation. For example, KH without ligand or with weak ligands for K+ as 12C4 reacted exclusively by ring opening. However, in the presence of strong ligands, as 15C5, 18C6 or cryptand C222, basicity of H- increased with the ability of the ligand for cation complexation. In the last case, ∼ 32% of the monomer was deprotonated. In these systems, gaseous H2 evolved during the initiation. Deprotonation of the monomer by some initiators resulted in macromols. with reactive aldehyde group or lactone ring as starting groups. They took part in the reaction with potassium alkoxide active centers of growing chains leading to the formation of branched poly(ε-caprolactone)s. Sodium hydride (NaH) was inactive, but in the presence of 15-crown-5 or 18-crown-6 initiated polymerization exclusively by ring opening. MALDI-TOF mass spectrometry supported with 13C NMR and SEC was used for anal. of the polymers obtained. Mechanism of the studied processes was proposed and discussed. The experimental part of the paper was very detailed, including the reaction process of 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane

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

《Dinitrogen Activation by a Heterometallic VFe Complex Derived from 1,1′-Bis(arylamido)vanadocene》 was published in European Journal of Inorganic Chemistry in 2020. These research results belong to Hatanaka, Tsubasa; Kusunose, Hinano; Kawaguchi, Hiroyuki; Funahashi, Yasuhiro. Category: ethers-buliding-blocks The article mentions the following:

For dinitrogen activation mediated by a heterobimetallic VFe complex, synthesis and reduction of a novel iron complex having 1,1′-bis(mesitylamido)vanadocene were performed. Reaction of the vanadocene ligand 2 with iron dichloride afforded a heterobimetallic VFe complex 3, characterized by x-ray crystallog. study. The mol. structure of the complex 3 showed the short V-Fe distance of 2.6373(3) Å, indicative of the bonding interaction between two metals. Reduction of the complex 3 with KC8 under a nitrogen atm. was found to result in the formation of a three-coordinate iron dinitrogen complex 4, in which the dinitrogen moiety shows one of the longest N-N bond lengths for iron dinitrogen complexes. Reduction of the complex 3 under an argon atm. was performed to isolate a reduced species [K(thf)5][3] as a reactive intermediate, whose structure was also determined by x-ray crystallog. After reading the article, we found that the author used 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Category: ethers-buliding-blocks)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Category: ethers-buliding-blocks

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

《The Conveyor Belt Umbrella Sampling (CBUS) Scheme: Principle and Application to the Calculation of the Absolute Binding Free Energies of Alkali Cations to Crown Ethers》 was published in Journal of Chemical Theory and Computation in 2020. These research results belong to Hahn, David F.; Zarotiadis, Rhiannon A.; Hunenberger, Philippe H.. Product Details of 33100-27-5 The article mentions the following:

We recently introduced a method called conveyor belt (CB) thermodn. integration (TI) for the calculation of alchem. free-energy differences based on mol. dynamics simulations. In the present work, the CBTI approach is generalized to conformational free-energy changes, i.e., to the determination of the potential of mean force (PMF) along a conformational coordinate ξ of interest. The proposed conveyor belt umbrella sampling (CBUS) scheme relies on the parallel simulation of K replicas k = 0,1, …, K – 1 of the system, with K even. For each replica k, the instantaneous value of ξ is restrained to an anchor value λk. The latter anchor points are equally spaced along a forward-turn-backward-turn path (i.e., a CB) between two extreme values defining the ξ-range of interest. The rotation of the CB is controlled by a variable Λ (range from 0 to 2π) which evolves dynamically along the simulation. The evolution of Λ results from the forces exerted by the restraining potentials on the anchor points, taken equal and opposite to those they exert on the replicas. Because these forces tend to cancel out along the CB, the dynamics of Λ is essentially diffusive, and the continuous distribution of ξ-values sampled by the replica system is automatically close to homogeneous. The latter feature represents an advantage over direct counting (DCNT) and traditional umbrella sampling (TRUS), shared to some extent with replica-exchange umbrella sampling (REUS). In this work, the CBUS scheme is introduced and compared to the three latter schemes in the calculation of 45 standard absolute binding free energies. These correspond to the binding of five alkali cations to three crown ethers in three solvents. Different free-energy estimators are considered for the PMF calculation, and the calculated values are also compared to those of a previous study relying on an alchem. path, as well as to exptl. data. In the experiment, the researchers used many compounds, for example, 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Product Details of 33100-27-5)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Product Details of 33100-27-5

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

《Potentiometric screen-printed sensor for determination of oxybutynin hydrochloride》 was written by El-Attar, Rehab O.; Hendawy, Hassan A. M.; Khaled, Elmorsy. Application of 33100-27-5 And the article was included in Journal of the Iranian Chemical Society in 2020. The article conveys some information:

Abstract: The present work describes the fabrication of disposable screen-printed oxybutynin hydrochloride (OXB) potentiometric sensors. The electrode matrix composition was investigated on the basis of the effect of the nature and concentration of sensing ionophores, anionic sites, plasticizers and nanomaterials. Incorporation of single-walled carbon nanotubes (SWCNTs) as transducer and (2, 3, 6-tri-O-methyl)-β-cyclodextrin as mol. recognition elements in the electrode matrix improved both the sensitivity and selectivity of the sensor towards oxybutynin hydrochloride. The fabricated sensors showed Nernstian slope of 57.5 ± 1.0 mV decade-1 in the concentration range from 10-6 to 10-2 mol L-1 OXB with detection limit of 8 x 10-7 mol L-1. Moreover, the presence of SWCNTs in the electrode matrix enhanced the potential reading stability, response time (< 4 s) and increased life time of the sensors (5 mo). The developed sensors were successfully applied for determination of OXB in pharmaceutical formulations and biol. fluids with agreeable average recoveries compared with the official methods. The experimental part of the paper was very detailed, including the reaction process of 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Application of 33100-27-5)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Application of 33100-27-5

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

In 2022,Durrant, James P.; Day, Benjamin M.; Tang, Jinkui; Mansikkamaki, Akseli; Layfield, Richard A. published an article in Angewandte Chemie, International Edition. The title of the article was 《Dominance of Cyclobutadienyl Over Cyclopentadienyl in the Crystal Field Splitting in Dysprosium Single-Molecule Magnets》.Product Details of 33100-27-5 The author mentioned the following in the article:

Replacing a monoanionic cyclopentadienyl (Cp) ligand in Dy single-mol. magnets (SMMs) with a dianionic cyclobutadienyl (Cb) ligand in the sandwich complexes [(η4-Cb””)Dy(η5-C5Me4tBu)(BH4)]- (1), [(η4-Cb””)Dy(η8-Pn )K(THF)] (2) and [(η4-Cb””)Dy(η8-Pn )]- (3) leads to larger energy barriers to magnetization reversal (Cb”” = C4(SiMe3)4, Pn = 1,4-di(tri-isopropylsilyl)pentalenyl). Short distances to the Cb”” ligands and longer distances to the Cp ligands in 1-3 are consistent with the crystal field splitting being dominated by the former. Theor. anal. shows that the magnetic axes in the ground Kramers doublets of 1-3 are oriented towards the Cb”” ligands. The theor. axiality parameter and the relative axiality parameter Z and Zrel are introduced to facilitate comparisons of the SMM performance of 1-3 with a benchmark SMM. Increases in Z and Zrel when Cb”’ replaces Cp signposts a route to SMMs with properties that could surpass leading systems. In the experiment, the researchers used 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Product Details of 33100-27-5)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Product Details of 33100-27-5

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

《Control of Crystallinity and Stereocomplexation of Synthetic Carbohydrate Polymers from D- and L-Xylose》 was written by McGuire, Thomas M.; Bowles, Jessica; Deane, Edward; Farrar, Elliot H. E.; Grayson, Matthew N.; Buchard, Antoine. Quality Control of 1,4,7,10,13-PentaoxacyclopentadecaneThis research focused onxylose polymer crystallinity stereocomplexation; carbohydrates; polyether; polysaccharide mimics; ring-opening polymerisation; stereocomplex; xylose. The article conveys some information:

Manipulating the stereochem. of polymers is a powerful method to alter their phys. properties. Despite the chirality of monosaccharides, reports on the impact of stereochem. in natural polysaccharides and synthetic carbohydrate polymers remain absent. Herein, we report the cocrystn. of regio- and stereoregular polyethers derived from D- and L-xylose, leading to enhanced thermal properties compared to the enantiopure polymers. To the best of our knowledge, this is the first example of a stereocomplex between carbohydrate polymers of opposite chirality. In contrast, atactic polymers obtained from a racemic mixture of monomers are amorphous. We also show that the polymer hydroxyl groups are amenable to post-polymerization functionalization. These strategies afford a family of carbohydrate polyethers, the phys. and chem. properties of which can both be controlled, and which opens new possibilities for polysaccharide mimics in biomedical applications or as advanced materials. The experimental part of the paper was very detailed, including the reaction process of 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane

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

The author of 《Chain-growth horner-wadsworth-emmons condensation polymerization initiated with an aliphatic aldehyde》 were Sato, Keichiro; Goto, Eisuke; Ochiai, Yuto; Higashihara, Tomoya. And the article was published in Journal of Photopolymer Science and Technology in 2019. Safety of 1,4,7,10,13-Pentaoxacyclopentadecane The author mentioned the following in the article:

The effective initiation for the chain-growth Horner-Wadsworth-Emmons (HWE) condensation polymerization was succeeded by utilizing an aliphatic aldehyde. Due to the higher electrophilicity of the aliphatic aldehyde compared with the aromatic one, the reactivity of the initiation might be accelerated, producing uniform intermediates to result in the formation of well-defined poly(3-(2-ethylhexyl)thienylene vinylene) (P3EHTV). Consequently, P3EHTV possessed the predictable mol. weight and lower molar-mass dispersity (ETHM = 1.16) value than that of P3EHTV obtained by employing aromatic aldehyde compounds as the initiators. In this polymerization system, neither transition metals nor halogens are utilized to realize low environmental-load synthesis of well-defined π-conjugated polymers. The results came from multiple reactions, including the reaction of 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Safety of 1,4,7,10,13-Pentaoxacyclopentadecane)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Safety of 1,4,7,10,13-Pentaoxacyclopentadecane

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