Tag: M.W:200-300

94-91-7, Name is N,N’-Bis(salicylidene)-1,2-propanediamine, molecular formula is C17H18N2O2, belongs to chiral-catalyst compound, is a common compound. In a patnet, once mentioned the new application about 94-91-7, Product Details of 94-91-7

Dioxoruthenium(VI) complexes are found to give low yield of epoxide but good yield of cyclohexenone.The complexes are electroactive giving metal centered RuVI/RuV couple.Cis-stilbene gives trans epoxide and benzaldehyde.Norbornene gives exo epoxy norbornene.The selectivity for allylic oxidation is high.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Product Details of 94-91-7. In my other articles, you can also check out more blogs about 94-91-7

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Chiral Catalysts,
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4488-22-6, Name is [1,1′-Binaphthalene]-2,2′-diamine, molecular formula is C20H16N2, belongs to chiral-catalyst compound, is a common compound. In a patnet, once mentioned the new application about 4488-22-6, Application In Synthesis of [1,1′-Binaphthalene]-2,2′-diamine

A new tertiary amine-based nucleophilic catalyst, derived from a simple combination of commercially available compounds, affords good to excellent kinetic resolution of racemic sec-alcohols.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Application In Synthesis of [1,1′-Binaphthalene]-2,2′-diamine. In my other articles, you can also check out more blogs about 4488-22-6

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Chiral Catalysts,
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The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.14098-44-3, Name is Benzo-15-crown-5, molecular formula is C14H20O5. In a Article，once mentioned of 14098-44-3, Computed Properties of C14H20O5

Crown ethers containing 3,4-thiophenediyl and 3,4-thiophenediylbis(methylene) subunits as a ring constituent were prepared starting from 2,5-bis(ethoxycarbonyl)-3,4-thiophenediol and 2,5-dichloro-3,4-bis(chloromethyl)thiophene, respectively.A Raney nickel desulfurization of the thiophene-containing crown ethers afforded crown ethers having two adjacent side chains, such as a methyl or ethoxycarbonylmethyl group.The extraction ability of these crown ethers towards alkali metal cations was also examined by the solvent extraction method.

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 14098-44-3 is helpful to your research., Computed Properties of C14H20O5

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Chiral Catalysts,
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The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.14098-44-3, Name is Benzo-15-crown-5, molecular formula is C14H20O5. In a Article，once mentioned of 14098-44-3, SDS of cas: 14098-44-3

The effect of {(1-x)N,N-dimethylacetamide (DMA) + xH2O} on the thermodynamics of benzo-15-crown-5 (B15C5) ether/Na+ complex formation at 298.15 K was investigated. B15C5/Na+ complexes were enthalpy stabilized and entropy stabilized in the mixed solvent DMA-water. The benzene ring was unable to form complexes with Na+ in {(1-x)DMA + xH2O}, {(1-x)dimethyl sulfoxide (DMSO) + xH2O}, and {(1-x)N,N-dimethylformamide (DMF) + xH2O}. A simple model was developed to describe the relationship between the thermodynamic functions of complex formation of crown ethers with Na+ and the structural and energetic properties of the mixed solvent. The effect decreased in the following series of solvents: DMA > DMF > DMSO or with the decrease in their hydrophobic properties. The enthalpy-entropy compensation for the complex formation process between the crown ethers (15C5 or B15C5) and Na+ appeared in the mixed water-organic solvent within the whole range of mixed solvent composition, if the structure of the mixed solvent was not disturbed by specific interactions between the molecules of crown ethers and those of mixture components.

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 14098-44-3 is helpful to your research., SDS of cas: 14098-44-3

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Chiral Catalysts,
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The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane, molecular formula is C10H20O5. In a Patent，once mentioned of 33100-27-5, Recommanded Product: 33100-27-5

Compounds, pharmaceutical compositions and methods for the therapeutic delivery of carbon monoxide to humans and other mammals that employ Mn complexes having CO ligands, and additional halogen, monodentate and/or bidentate ligands, wherein the additional ligands do not occupy trans positions relative to each other.

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 33100-27-5 is helpful to your research., Recommanded Product: 33100-27-5

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Chiral Catalysts,
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Reference of 33100-27-5. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane

Tungsten Alkyne Complexes, Synthesis, IR Spectra, 13C NMR Spectra, Crystal Structure Several tungsten alkyne complexes of the type C-H)>2 and C-R’)>2 have been prepared by reactions of WCl6 with the alkynes in the presence of C2Cl4.Treating with BrSiMe3 leads to corresponding bromo complexes, whereas reactions of NaF and KF, respectively, in acetonitrile solution in the presence of crown ethers yield the fluoro complexes C-R’)> and C-R’)>, respectively.All complexes were characterized by IR and 13C NMR spectroscopy.The crystal structures of C-H>*CH3CN and C-Se-n-C4H9)(CH3CN)> have been determined by X-ray methods. C-H)>*CH3CN: Space group P21, Z = 2 , 8555 observed unique reflexions, R = 0.034.Lattice dimensions at – 70 deg C: a = 1199.4(3), b = 893.4(2), c = 1351.8(3) pm, beta = 109.73(3) deg.The compound forms ion pairs via three K-F contacts with bond lengths of 262.0, 282.7, and 293.3 pm; the potassium ion is thus nine-fold coordinated by the six oxygen atoms of the crown ether molecule and by three fluoride ligands.The alkyne ligand is bonded side on to the tungsten atom of the C-H)>- unit with WC bond lengths of 202.4 and 202.6 pm, respectively. C-Se-n-C4H9)(CH3CN)>: Space group P21/a, Z = 4, 4595 observed unique reflections, R = 0.058.Lattice dimensions at -70 deg C: a = 1030.3(5), b = 1596.3(9), c = 1170.9(7) pm, beta = 104.28(3) deg.The compound has a molecular structure, in which the tungsten atom is seven-fold coordinated by four chloride ligands, by the two alkyne carbon atoms (WC bond lengths 200 and 203 pm), and in trans position to the latter by the nitrogen atom of the acetonitrile molecule with a W-N bond length of 226 pm.

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Chiral Catalysts,
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Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 14098-44-3, C14H20O5. A document type is Article, introducing its new discovery., Formula: C14H20O5

A new series of benzo-15-crown-5 adducts with hydrated lanthanide (La, Pr, Nd, Sm, Eu, Gd, Er) picrates has been obtained. Elemental analyses indicated that their stoichiometry is 1:2:3 (metal : benzo-15-crown-5 : picrate) except for the lanthanum adduct. X-ray structural analysis of the Nd, Sm and Er adducts revealed that Nd, Sm or Er ions coordinate directly with water molecules and the picrate anion. The benzo-15-crown-5 acts as a second-sphere ligand which associates with the Nd, Sm or Er ion through hydrogen bonding by coordinating water molecules. From investigation of the IR and UV-vis spectra of the adducts, it can be deduced that the adducts, except lanthanum, exhibit a similar molecular structure to that of the Nd, Sm and Er adducts. These new adducts may also be classified as supermolecules because each is an associate of two chemical species of hydrated lanthanide picrate and benzo-15-crown-5 held together by coordination water molecules. Copyright

Interested yet? Keep reading other articles of 14098-44-3!, Formula: C14H20O5

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Chiral Catalysts,
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In an article, published in an article, once mentioned the application of 14098-44-3, Name is Benzo-15-crown-5,molecular formula is C14H20O5, is a conventional compound. this article was the specific content is as follows.Application In Synthesis of Benzo-15-crown-5

Reaction of an aqua regia solution of gold metal with 15-crown-5 and its derivatives results in the formation of the hydrogen bonded aggregates [H7O3][AuCl4]·15-crown-5 1 and [H5O2][AuCl4]-(benzo-15-crown-5)2 2; complex 1 exhibits a complex, cross-linked structure in which the H7O3+ unit hydrogen bonds to two adjacent crown ethers and a chloride ligand of the anion; the AuIII centre also engages in long-range interactions wtih the crown oxygen atoms.

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Synthetic Route of 14098-44-3, An article , which mentions 14098-44-3, molecular formula is C14H20O5. The compound – Benzo-15-crown-5 played an important role in people’s production and life.

The solvent extraction of rubidium and caesium picrates has been studied at 25 deg C with mixtures of crown ether and tributyl phosphate (TBP) or trioctylphosphine oxide (TOPO) in benzene, and the adduct-formation constants in the benzene solution have been calculated. The crown ethers used in this work were 12-crown-4 (12C4), 15-crown-5 (15C5), and benzo-15-crown-5 (B15C5). The stoichiometric composition of any extracted complex under the present experimental conditions is alkali metal ion : crown ether : TBP or TOPO : picrate ion = 1:1:1:1. The TOPO complex is more extractable than the corresponding TBP complex. The extractability of the Rb+ complex is larger than that of the corresponding Cs+ complex. For both TBP and TOPO, the adduct-formation constant value sequences of Rb+ and Cs+ are B15C5>12C4>15C5> and 12C4>B15C5>15C5, respectively.

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Chiral Catalysts,
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Related Products of 33100-27-5. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane. In a document type is Article, introducing its new discovery.

A novel method has been developed to enhance the sensitivity and selectivity of the thermal lens detection of lanthanide Ions. In this method, the rare-earth ions were selectively extracted from water to organic solvent with the use of crown ether, e.g., 18-crown-6, 15-crown-5 as synergistic extractant. The thermal lens signal intensity of the extracted ions in the organic phase can be enhanced up to 24-fold. This enhancement is due to the fact that the thermal lens signal is dependent on the thermooptical properties of the solvent, and water is a poor thermooptical solvent (low dn/dT and high thermal conductivity, k, values), whereas organic solvents are good themooptical media (high dn/dT and low k values). The well-defined cavities of the crown ethers restrict their complex formation (and hence solvent extraction) only with the rare-earth ions whose sizes are comparable to their cavities, and this is the origin for the improvement in the selectivity. For Instance, with the use of 18-crown-6, up to 41% of the Er3+ ion can be extracted from water to chloroform, whereas the extraction yield for the Pr3+ ion, under the same experimental conditions, was only 28%. The thermal lens technique was used to determine the stoichiometry of the extracted ion pair complexes.

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Chiral Catalysts,
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