Tag: M.W=200-250

Gawryszewska, P. published the artcileInfluence of charge-transfer state on luminescence properties of Eu(III) complex with o-phenylenedioxydicarboxylic acid, Formula: C10H10O6, the publication is Journal of Luminescence (2007), 496-499, database is CAplus.

Na[Eu(C₁₀H₈O₆)₂(H₂O)₂].4H₂O (C₁₀H₈O₆ = 1,2-benzenedioxydiacetato) was synthesized. Absorption, emission, and excitation spectra at 293, 77 and 4 K as well as the luminescence decay time measurements were applied to characterize the photophys. properties of the crystals. Strong temperature dependence of the luminescence decay time suggests that the ligand-to-metal charge-transfer state of Eu(III) deactivates the ligand excited state so that the energy transfer from ligand triplet state to metal ion levels does not occur. A correlation between spectroscopic properties of the complex in solid state and in solutions was made. The study for different pH values and various metal:ligand molar ratios showed the existence of >1 form of the complex where ML and ML₂ forms dominated.

Journal of Luminescence published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C10H10O6, Formula: C10H10O6.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Xu, Li-Juan published the artcileNovel 1D chain coordination polymer constructed by neodymium(III) and natrium(I) with 1,2-phenylenedioxydiacetic acid, Category: catalysis-chemistry, the publication is Wuji Huaxue Xuebao (2009), 25(12), 2197-2201, database is CAplus.

A complex [NaNd(BDOA)₂(H₂O)₂]¡¤4H₂O (BDOA = 1,2-phenylenedioxydiacetate) was prepared by solvent method. The title complex was characterized by X-ray single-crystal diffraction. The complex belongs to triclinic system with space group P1?, a = 0.874 090(10) nm, b = 1.230 49(2) nm, c = 1.270 79(2) nm, ¦Á = 76.039 0(10)¡ã, ¦Â = 78.285 0(10)¡ã, ¦Ã = 84.489 0(10)¡ã, V = 1.297 21(3) nm³, Z = 2, F(000) = 726, R₁ = 0.023 4, wR₂ = 0.056 7. Two kinds of centers metal ions Nd³⁺ and Na⁺ ions are in the complex. Metal ions are connected into a 1D chain through water oxygen atoms, tridentate carboxylate oxygen and bidentate caboxylate oxygen atoms. Each Nd³⁺ ion is coordinated by four carboxylate oxygen atoms, four ether oxygen atoms from two BDOA ligands and two water mols. The Na⁺ is coordinated by four carboxylate oxygen atoms and two water mols. The adjacent 1D chains are connected by hydrogen bonds and ¦Ð-¦Ð stacking interactions into 3D supramol. structure.

Wuji Huaxue Xuebao published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C25H34N4O2S, Category: catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Corbierre, Muriel K. published the artcilePreparation of Thiol-Capped Gold Nanoparticles by Chemical Reduction of Soluble Au(I)-Thiolates, Recommanded Product: 2,4,6-Triisopropylbenzenethiol, the publication is Chemistry of Materials (2005), 17(23), 5691-5696, database is CAplus.

A novel preparation method of thiol-stabilized gold nanoparticles is described. Soluble Au(I)-thiolate complexes were prepared, isolated, and reduced with Superhydride (lithium tri-Et borohydride) in suitable inert solvents. The dimensions of the resulting gold nanoparticles were compared to those prepared using conventional methods (i.e., that use a mixture of Au(III) salts and thiols as the initial reagents). The sizes (and size dispersity) of the thiol-capped gold nanoparticles synthesized here are comparable to those prepared by the conventional methods used.

Chemistry of Materials published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, Recommanded Product: 2,4,6-Triisopropylbenzenethiol.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Della Monica, Francesco published the artcileCO₂ cycloaddition to epoxides promoted by bis-thioether-phenolate Fe(II) and Fe(III) complexes, SDS of cas: 22693-41-0, the publication is Molecular Catalysis (2018), 46-52, database is CAplus.

The synthesis and characterization of three new bis-thioether-phenolate monoanionic tridentate [SOS]-type ligands, and the synthesis of the corresponding Fe(II) and Fe(III) complexes are reported. Their application, in combination with tetrabutylammonium bromide (TBAB), as catalysts for the cycloaddition of CO₂ to a number of monosubstituted epoxides and cyclohexene oxide was investigated. For example, epichlorohydrin is converted in the corresponding cyclic carbonate, with a turnover frequency of 155 h^-1 (0.1 mol% of iron, 0.5 mol% of TBAB, 10 bar of CO₂). With the aim to obtain further information about the catalyst structure-activity relationship and the reaction mechanism, the reaction between the catalyst precursors and TBAB was investigated, suggesting the formation of an anionic metalate species in the case of the Fe(III) complexes that is supposed to be true catalyst. A mechanistic scenario explaining the different behavior of the Fe(II) and Fe(III) complexes is proposed.

Molecular Catalysis published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, SDS of cas: 22693-41-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Faivre-duPaigre, Roger published the artcileMorphological modifications produced in Italian ryegrass by 2,4-dichlorophenoxyacetic acid (2,4-D), 2-methyl-4-chlorophenoxyacetic acid (MCPA), and 2-methyl-4-chlorophenoxybutyric acid (MCPB), Product Details of C12H16O3, the publication is Compt. rend. (1961), 3107-9, database is CAplus.

Application of 1, 2, 5, or 10 kg./hectare of 2,4-D, MCPA, or MCPB to Lolium italicum after tillering produces anomalous growth of stems and heads. Stems show aberrant tillering at the base of the plants and at internodes, and curvature of nodes and internodes. Rachises may be bi- or trifurcated, elongated or shortened, or have spiral or sinuate conformations. Spikelets may vary in point of attachment, may be pedicellate, compound, or sterile. A single plant may show any or all of these modifications.

Compt. rend. published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C12H16O3, Product Details of C12H16O3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Cragg, R. Harry published the artcileContributions to Group IV organometallic chemistry. VII. The effect of electronegativity on substituent shifts in silicon-29 NMR, Synthetic Route of 312-40-3, the publication is Journal of Organometallic Chemistry (1984), 277(2), 199-201, database is CAplus.

Silicon-29 NMR shifts for silanes Me_2-nPh_nSiX₂ (X = H, Me, Ph, F, Cl, NR₂, OR; R = Me, Et, CHMe₂, Ph) indicate that the shifts on replacement of a Me by a Ph group are largely determined by the electronegativity and donor ability of X.

Journal of Organometallic Chemistry published new progress about 312-40-3. 312-40-3 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Difluorodiphenylsilane, and the molecular formula is C12H10F2Si, Synthetic Route of 312-40-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Hughes, David L. published the artcileFive-coordinate complexes [MoH(SC₆H₂R₃-2,4,6)₃(PR’Ph₂)] (R = Me or Prⁱ, R’ = Me or Et) and their reactions with nitrogen donors. Crystal structures of [MoH(SC₆H₂Prⁱ₃-2,4,6)₃(C₅H₅N)(PMe₂Ph)], [MoH(NC₅H₄S-2)₂(SC₆H₂Prⁱ₃-2,4,6)(PEtPh₂)] and [PPh₄][MoO(SC₆H₂Prⁱ₃-2,4,6)₄], Product Details of C15H24S, the publication is Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1995), 5-15, database is CAplus.

[MoH(SC₆H₂R₃-2,4,6)₃(PR’Ph₂)] (1) (R = Me or Prⁱ, R’ = Me or Et) were prepared by reaction of HSC₆H₂R₃-2,4,6 with [MoH₄(PR’Ph₂)₄] or trans-[Mo(N₂)₂(Pr’Ph₂)₄]. 1 (R = Prⁱ, R’ = Me) reacted with N-donor ligands L (py, 3-Mepy, 3,5-Me₂py or C₃H₃NS) to give [MoH(SC₆H₂Prⁱ₃-2,4,6)₃L(PMePh₂)] (2). The crystal structure of the analog [MoH(SC₆H₂Prⁱ₃-2,4,6)₃(py)(PMe₂Ph)] showed the compound to have a trigonal girdle of thiolate ligands with the pyridine and PMe₂Ph ligands in essentially apical positions. Reaction of 1 (R = Prⁱ, R’ = Et) with pySH-2 gave the seven-coordinate complex [MoH(SC ₆H₂Prⁱ₃-2,4,6)(pyS-2)₂(PEtPh₂)], shown by x-ray crystallog. to have an essentially pentagonal-pyramidal geometry with the hydride located in the equatorial plane. Spectroscopic data for the compounds are discussed in terms of their structures. 1 (R = Prⁱ, R’ = Et) exchanges hydride for deuteride on treatment with deuterium gas in benzene at 20¡ã. Treatment of 1 (R = Prⁱ, R’ = Me) in MeOH with LiBEt₃H, followed by [PPh₄]Cl, gave [PPh₄][MoO(SC₆H₂Prⁱ₃-2,4,6)₄], shown by x-ray crystallog. to have an anion with square-pyramidal geometry and an apical oxide-ligand.

Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, Product Details of C15H24S.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Santoro, Orlando published the artcileN-heterocyclic carbene copper(I) catalysed N-methylation of amines using CO₂, HPLC of Formula: 2909-77-5, the publication is Dalton Transactions (2015), 44(41), 18138-18144, database is CAplus and MEDLINE.

The N-methylation of amines using CO₂ and PhSiH₃ as source of CH₃ was efficiently performed using a N-heterocyclic carbene copper(I) complex. The methodol. was found compatible with aromatic and aliphatic primary and secondary amines. Synthetic and computational studies have been carried out to support the proposed reaction mechanism for this transformation.

Dalton Transactions published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C14H23N, HPLC of Formula: 2909-77-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Schmink, Jason R. published the artcilePalladium-Catalyzed Synthesis of Diarylmethanes: Exploitation of Carbanionic Leaving Groups, Product Details of C13H10F2, the publication is Organic Letters (2009), 11(12), 2575-2578, database is CAplus and MEDLINE.

A novel route to the synthesis of diarylmethanes via a Pd-catalyzed ¦Á-arylation of benzyl ketones is reported. By harnessing the inherent reactivity of enolates, it is possible to circumvent the need for a transmetalating reagent such as boron for the coupling. Addnl., the two Ph rings of the intermediate are exploited to stabilize the high-energy carbanionic leaving group in a straightforward synthesis.

Organic Letters published new progress about 457-68-1. 457-68-1 belongs to catalysis-chemistry, auxiliary class Fluoride,Benzene, name is Bis(4-fluorophenyl)methane, and the molecular formula is C13H10F2, Product Details of C13H10F2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Pshezhetskii, V. S. published the artcileRole of the cofactor in catalysis on macromolecular models of catalase, Application of N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, the publication is Doklady Akademii Nauk SSSR (1972), 204(6), 1492-5 [Biochem], database is CAplus.

The effects of the presence of H2O2 on the form of titration curves of HCl salts of H2NCH2CH2NH2, triethylenetetramine, BuNH2, and Me2NCH2CH2NMe2 were described graphically. Reduction of basicity of the 1st 2 amines was noted in the presence of H2O2 owing to formation of a complex between the reactants. The tertiary amines do not exhibit this behavior and do not form such a complex. The kinetic equations for complex formation were drawn up in general terms and applied to the specific cases above. Catalyzed decomposition of H2O2 over polymeric metal-containing complexes of polyacrylic and polymethacrylic acids in the presence of the 1st 2 amines was discussed. It was concluded that this consists of the interaction of the 2 complexes of H2O2 with the amines with the possibility of forming 2 H bonds between them. The order of such reactions is variable and dependent on pH as this affects the concentration of HO2-, which, along with the H2O2 complexes, undergo catalytic decomposition on the polymeric complexes. Rate constants were reported for decomposition of H2O2 on polymers of the above types in the presence of the 2 active amines and Fe(III).

Doklady Akademii Nauk SSSR published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C6H20Cl2N4, Application of N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia