Tag: M.W:200-300

Reference of 29841-69-8, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.29841-69-8, Name is (1S,2S)-(-)-1,2-Diphenylethylenediamine, molecular formula is C14H16N2. In a Article£¬once mentioned of 29841-69-8

Dielectric anisotropy of a homochiral rare-earth metal complex

A homochiral rare-earth metal Tb complex that exhibited a very large dielectric anisotropic property with a temperature-independent feature is obtained. Our findings on high-dielectric anisotropy will provide a new impetus in this field of materials science. The Royal Society of Chemistry.

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Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Related Products of 153-94-6, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.153-94-6, Name is H-D-Trp-OH, molecular formula is C11H12N2O2. In a Review£¬once mentioned of 153-94-6

Molecularly imprinted polymers for biomedical and biotechnological applications

This survey covers main advances in the preparation and application of molecularly imprinted polymers which are capable of specific recognition of biologically active compounds. The principles underlying the production of highly efficient and template-specific molecularly imprinted polymers are discussed. The focus is on the imprinting of highly structured macromolecular and supramolecular templates. The existing and potential applications of molecularly imprinted polymers in various fields of chemistry and molecular biology are considered.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Synthetic Route of 29841-69-8, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.29841-69-8, Name is (1S,2S)-(-)-1,2-Diphenylethylenediamine, molecular formula is C14H16N2. In a Article£¬once mentioned of 29841-69-8

Chiral diphenylselenophosphoramides: A new class of chiral ligands for the titanium(IV) alkoxide-promoted addition of diethylzinc to aldehydes

Chiral C2-symmetric diphenylselenophosphoramides 1 and 2 were prepared from the reaction of diphenylselenophosphinic chloride with (1R,2R)-(-)-1,2-diaminocyclohexane and (1R,2R)-(+)-1,2-diphenylethylenediamine, respectively, in high yields. Another novel chiral ligand 3 was prepared from the reaction of diphenylselenophosphinic chloride with (R)-(+)-1,1′-binaphthyl-2,2′-diamine using butyllithium as the base. The ligands were used as catalytic chiral ligands in the titanium(IV) alkoxide-promoted enantioselective addition reaction of diethylzinc to aldehydes. Copyright (C) 2000 Elsevier Science Ltd.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 29841-69-8

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Synthetic Route of 1941-30-6, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 1941-30-6, Name is Tetrapropylammonium bromide, molecular formula is C12H28BrN. In a Article£¬once mentioned of 1941-30-6

Synthesis and modification of ZSM-5 with manganese and lanthanum and their effects on decolorization of indigo carmine dye

Hydrothermally synthesized ZSM-5 zeolite modified by manganese (Mn/ZSM-5) or lanthanum (La/ZSM-5) or mixture of both (Mn-La/ZSM-5) using impregnation technique was characterized by powder XRD, FTIR and N2 adsorption measurements. These materials were tested for discoloration (adsorption) and mineralization (in the presence of UV irradiation) of indigo carmine (IC) dye. The results indicate that MnOx incorporated ZSM-5 that showed the highest lattice volume and pore radius between all samples presented the highest photocatalytic activity, comparatively. However, the Mn-La/ZSM-5 catalyst exhibited the lowest activity even when compared with the parent ZSM-5 sample. This was in part due to evoking of Mn3O4 species at the expense of Mn2O3 ones, which were proposed to be the active sites of the reaction. This reaction was found to be acidity dependent since Mn/ZSM-5 showed significant bands at 3650 and 3619 cm -1 those in contrast appeared shapely in La/ZSM-5, whereas for Mn-La/ZSM-5 only a band at 3619 cm-1 was obtained. On the other hand, the decolorization activity showed comparable high rates for Mn/ZSM-5 and Mn-La/ZSM-5 samples (100% removal) implying that the adsorption process is more referred to acid-base site pairs where the photocatalytic activity seems to be more restricted to acidic sites. The influence of pH, catalyst amount and time on the decolorization rate of IC on Mn/ZSM-5 was thoroughly investigated and correlated with ZPC of MnOx species, various exposed species of MnOx and surface properties.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent£¬ Recommanded Product: 1271-19-8, Which mentioned a new discovery about 1271-19-8

Titanocene and zirconocene complexes containing dendrimer-substituted cyclopentadienyl ligands – Synthesis and ethylene polymerization

This paper describes the synthesis of a series of titanium and zirconium metallocenes bearing one or two first-generation silane dendritic wedges as bulky substituents at their cyclopentadienyl rings. Wedges (R2R?SiCH2CH2)3SiCl [R = R? = Et (1); R = Ph, R? = Me (2)] were prepared by hydrosilylation of chlorotrivinylsilane with R2R?SiH. They were reacted with K(C5H5 and, subsequently, with KH to give K[(R2R?SiCH2 CH2)3Si(C5H4)] [R = R? = Et (3); R = Ph, R? = Me (4)]. The dendronized cyclopentadienides 3 and 4 were the starting materials for preparation of the mixed-ring titanocenes [{(R2R?SiCH2 CH2)3SiC5H4} (C5R?5)TiCl2] [R = R? = Et, R? = H (5), R? = Me (6); R = Ph, R? = Me, R? = H (7), R? = Me (8)] or the symmetrically substituted metallocenes [{(Ph2MeSiCH2 CH2)3SiC5 H4}2MCl2] [M = Ti (9), Zr (10)]. Cyclic voltammograms and catalytic behavior of all the new metallocenes in ethylene polymerization, using MAO as a co-catalyst, have been studied and compared to that of related non-dendritic complexes. Polyethylene polydispersities increase with the number of dendritic wedges in the catalyst, while activities decrease. Bimodal molecular weight distributions were clearly observed for the bis-dendritic titanocene 9. Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002.

Because enzymes can increase reaction rates by enormous factors and tend to be very specific, Recommanded Product: 1271-19-8, typically producing only a single product in quantitative yield, they are the focus of active research.you can also check out more blogs about 1271-19-8

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is traditionally divided into organic and inorganic chemistry. Recommanded Product: 61478-26-0. The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 61478-26-0

HDAC INHIBITORS AND USES THEREOF

Inhibitors of histone deacetylase, including compounds having a diazabicyclo[2.2.1]heptan-2-yl moiety are described together with methods for treating various disorders with such compounds

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is traditionally divided into organic and inorganic chemistry. Formula: C12H28BrN. The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 1941-30-6

Salting-in and salting-out effects of organic and inorganic ammonium salts on the aqueous polymer solutions

This paper accomplishes a broad survey of the salting effects of different ammonium salts on the aqueous polymer solutions. In order to cover a wide range of hydrophilic and hydrophobic nature of solutes, salts including ammonium chloride (NH4Cl), ammonium bromide (NH4Br), tetraethyl ammonium bromide (TEAB), tetrapropyl ammonium bromide (TPAB), tetrabutyl ammonium bromide (TBAB), tetrabutyl ammonium chloride (TBAC), and dodecyl trimethyl ammonium bromide (DTAB), and polymers polyethylene glycol (PEG400 and PEG10000) and polypropylene glycol (PPG400 and PPG1000) have been used. In the first part of this work, cloud point temperatures (TC) for binary system of PPG1000 in pure water and for ternary systems of PPG1000 in aqueous solutions of ammonium salts have been determined by visual observation. It is shown that while the inorganic ammonium salts (NH4Cl and NH4Br) reduce the TC values of PPG1000 aqueous solutions (salting-out effect), the organic ammonium salts (TEAB, TPAB, TBAB, TBAC, DTAB) because of hydrocarbon portions in their structure favourably interact with PPG1000 and elevate the TC values (salting-in effect). The values of salting coefficient and energetic parameters of clouding process have been calculated. In the second part of this work, the isopiestic equilibrium has been investigated for several ternary {polymer + ammonium salt + water} systems at 298.2 K. Three different types of constant water activity curves deviation from the linear isopiestic relation (LIR) were observed: negative deviations for systems which undergo salting-out phenomenon and phase separation, positive deviations for systems which undergo salting-in effect, and non-deviation for semi-ideal solutions. The effects of type and molar mass of polymers, and type of cation and anion of ammonium salts on the magnitude and type of salting effects have been scrutinized.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 1271-19-8, name is Titanocenedichloride, introducing its new discovery. Computed Properties of C10Cl2Ti

Evolved gas analysis of Ti(C5H5)2Cl 2 by means of Li+ ion attachment mass spectrometry

Characterization of the compound Ti(C5H5) 2Cl2 was studied using Li+ ion attachment mass spectrometry (IAMS) as an analytical methodology. Since this target compound is used as an anticancer drug in the treatment of leukemia, accurate and rapid monitoring methods for the determination of titanium drugs in a hospital environment are desirable. A quadrupole mass spectrometry system along with a Li+ ion attachment technique and a direct inlet probe (DIP) produced the Li+ adduct of Ti(C5H5)2Cl 2, Ti(C5H5)2Cl2Li +. The DIP also was used to study the temperature-resolved behavior of this compound. The slope of the plot of signal intensity of Ti(C 5H5)2Cl2Li+ versus temperature for Ti(C5H5)2Cl2 sublimation from 60 to 100 C was used to determine an apparent activation energy (Ea) of 124.43 kJ/mol for the sublimation of Ti(C 5H5)2Cl2. This value is comparable to the reported value of 118.8 kJ/mol for molar enthalpy of sublimation of Ti(C5H5)2Cl2. These results demonstrate that the IAMS methodology can be used to study the enthalpy of sublimation for d-metal complex materials.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 1271-19-8 is helpful to your research. Computed Properties of C10Cl2Ti

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, SDS of cas: 3922-40-5, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 3922-40-5, Name is 1,10-Phenanthroline-4,7-diol, molecular formula is C12H8N2O2. In a Review, authors is Jessop, Philip G.£¬once mentioned of 3922-40-5

Recent advances in the homogeneous hydrogenation of carbon dioxide

Homogeneous hydrogenation of carbon dioxide continues to attract interest in the hope of finding active and selective catalysts for the production of valuable organics based on this cheap and abundant carbon source. This review covers advances published or in press since 1995. The survey of the field shows that while very active catalysts and co-catalysts have been discovered in this period for the production of formic acid and its derivatives, there has been only preliminary development of homogeneous catalysts for the production of other oxygenates (e.g. methanol, CO) and Cn-compounds (n > 1).

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Reference of 18531-99-2, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.18531-99-2, Name is (S)-[1,1′-Binaphthalene]-2,2′-diol, molecular formula is C20H14O2. In a article£¬once mentioned of 18531-99-2

BINOL-salen metal catalysts incorporating a bifunctional design.

Salen metal complexes incorporating two chiral BINOL moieties have been synthesized and characterized crystallographically. The corresponding bisnaphthoxide complexes have been found to catalyze the asymmetric addition of benzyl malonate to cyclohexenone in up to 90% ee. With these modular catalysts, the Lewis acid and Bronsted base portions can be independently altered.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI