Tag: M.W=200-250

Akdemir, Ue. published the artcileShear flocculation of fine hematite particles and correlation between flocculation, flotation and contact angle, Related Products of catalysis-chemistry, the publication is Powder Technology (1997), 94(1), 1-4, database is CAplus.

This paper presents a study on the shear flocculation of fine (38 ¦Ìm) hematite using dodecylamine acetate and Aero 801 (a mixture of petroleum sulfonate and mineral oil) as collectors. The effects of pH, collector concentration and stirrer speed were investigated. In addition, contact angle and flotation recoveries of the mineral were determined at different pH values. The results indicated that shear flocculation was possible over a wide pH range with the amine, whereas it was restricted to a narrow pH range (2.5-3.5) with Aero 801. This was attributed to the better hydrophobicity of the mineral, indicated by higher flotation recoveries and contact angles within the same ranges.

Powder Technology published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Related Products of catalysis-chemistry.

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

Anonymous published the artcilePhosphines as Photoinitiators, Safety of 2,6-Diisopropyl-N,N-dimethylaniline, the publication is Research Disclosure (2000), 437(Sept.), P1560-P1561, database is CAplus.

Phosphines, especially triphenylphosphine, were successfully used as photoinitiators in curing epoxy acrylate coating compositions, individually or in combination with tertiary amines or electron donors, i.e. borates.

Research Disclosure 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, Safety of 2,6-Diisopropyl-N,N-dimethylaniline.

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

Anonymous published the artcileTriethylenetetramine hydrochloride morph, COA of Formula: C6H20Cl2N4, the publication is IP.com Journal (2017), 17(3A), 1-8, database is CAplus.

A process for preparation of dihydrochloride salt of triethylenetetramine or N,N’-bis(2-aminoethyl)-1,2-ethanediamine (Form T) has been disclosed. Form T is characterized by X-ray diffraction spectra, Infra-red spectra, differential scanning calorimetry (DSC) and m.p.

IP.com Journal 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, COA of Formula: C6H20Cl2N4.

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

Bardin, V. V. published the artcileReactions of polyfluoroaromatic compounds with electrophilic agents in the presence of tris(dialkylamino)phosphine. 6. Reactions of halotetrafluorobenzenes, RC₆F₄X (X = Cl, Br, I) with chlorotrimethylsilane, Quality Control of 1206-46-8, the publication is Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya) (1997), 46(4), 780-785, database is CAplus.

The rate of replacement of the halogen atom in isomers of RC₆F₄X (X = Cl, Br, I) by the SiMe₃ group under the action of Me₃SiCl and P(NEt₂)₃ depends on the nature and the mutual arrangement of the substituents X and R. In addition to silyldehalogenation, compounds C₆HF₄X (X = Br, I) undergo silyldeprotonation and reduction to tetrafluorobenzenes.

Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya) published new progress about 1206-46-8. 1206-46-8 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Trimethyl(perfluorophenyl)silane, and the molecular formula is C9H9F5Si, Quality Control of 1206-46-8.

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

Benmalek, M. published the artcileDetermination of the partition coefficients of some organosilicon derivatives, Product Details of C12H10F2Si, the publication is Inorganic and Nuclear Chemistry Letters (1973), 9(11), 1153-5, database is CAplus.

The partition coefficients at ambient temperature of silane derivatives between C6H6 and an aqueous solution, containing enough acid to prevent hydrolysis of the derivative, are D = [concentration in the organic phase]/[concentration in the aqueous phase] = 1000, 8, 10, 3, 0.5, and 0.3 for Ph2SiF2, Et3SiF, Ph2SiCl2, Et3SiCl, Ph2Si(OH)2, and Et3SiOH, resp. The D values were determined by activation of the Si with 14-MeV neutrons [28Si(n,p)28Al], and then counting the 1.78-MeV ¦Ã-rays of 28Al in the organic and aqueous phases by using thin quartz disks, simultaneously irradiated with the samples, as standards

Inorganic and Nuclear Chemistry Letters 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, Product Details of C12H10F2Si.

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

Brewer, George J. published the artcileNovel therapeutic approaches to the treatment of Wilson’s disease, Category: catalysis-chemistry, the publication is Expert Opinion on Pharmacotherapy (2006), 7(3), 317-324, database is CAplus and MEDLINE.

A review. The treatment of Wilson’s disease has changed considerably in recent times, from the use of penicillamine (Cuprimine^, Merck) for all stages and types of disease, to the use of three other anticopper drugs at appropriate times for appropriate patients. Each type and stage of the disease can be considered as a therapeutic target, for which specialised therapy is appropriate. This paper systematically reviews the various types and stages of Wilson’s disease presentation, and provides opinion on the appropriate therapy for each. For patients presenting with neurol. disease, the use of tetrathiomolybdate is optimum; for patients presenting with mild-to-moderate hepatic failure, a combination of trientine (Syprine, Merck) and zinc is recommended, whereas liver transplantation is necessary for those with severe failure; zinc therapy alone or trientine alone as second choice is recommended for patients presenting with hepatitis or cirrhosis without liver failure, for maintenance therapy, for treatment of presymptomatic patients and for treatment of pediatric and pregnant patients.

Expert Opinion on Pharmacotherapy 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, Category: catalysis-chemistry.

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

Xie, Qiqiang published the artcileControllable double CF₂-insertion into sp² C-Cu bond using TMSCF₃: a facile access to tetrafluoroethylene-bridged structures, Formula: C9H9F5Si, the publication is Chemical Science (2020), 11(1), 276-280, database is CAplus and MEDLINE.

A highly efficient method for controllable double CF2-insertion into pentafluorophenylcopper species using TMSCF₃ as difluoromethylene source had been developed. The newly generated fluoroalkylcopper(I) species, C₆F₅CF₂CF₃Cu, showed good reactivity toward a myriad of structurally diverse aryl, heteroaryl and alkenyl iodides. This protocol was easy to handle, ready to scale up and applicable for the synthesis of relative complex mols., thus providing a convenient method for facile access to tetrafluoroethylene-bridged structures C₆F₅CF₂CF₂R [R = 2-thienyl, Ph, 4-NCC₆H₄, etc.].

Chemical Science published new progress about 1206-46-8. 1206-46-8 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is Trimethyl(perfluorophenyl)silane, and the molecular formula is C26H26N4O7, Formula: C9H9F5Si.

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

Barkov, Alexey Yu. published the artcileHighly regio- and stereoselective 1,3-dipolar cycloaddition of stabilised azomethine ylides to 3,3,3-trihalogeno-1-nitropropenes: synthesis of trihalomethylated spiro[indoline-3,2′-pyrrolidin]-2-ones and spiro[indoline-3,3′-pyrrolizin]-2-ones, COA of Formula: C10H11NO4, the publication is Tetrahedron (2016), 72(43), 6825-6836, database is CAplus.

Reactions of 3,3,3-trihalogen-1-nitropropenes with N-alkyl-¦Á-amino acids (sarcosine, proline) and isatins proceed regio- and diastereoselectively to give a wide range of trihalomethylated spiro[indoline-3,2′-pyrrolidin]-2-ones I (R¹ = H, 5,7-(Br)₂; R = H, CH₃, C₅H₁₁, Bn; X = F, Br, Cl) and spiro[indoline-3,3′-pyrrolizin]-2-ones II (R¹ = H, 5-NO₂, 5,7-(Br)₂; R = H, CH₃, C₅H₁₁, Bn; X = F, Br, Cl) in good yields as a result of a 1,3-dipolar cycloaddition of the intermediate stabilized azomethine ylide at the double bond of the nitroalkenes.

Tetrahedron published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C10H11NO4, COA of Formula: C10H11NO4.

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

Othmer, Donald F. published the artcileCorrelation of latent heats and entropies of vaporization with temperature, Safety of Difluorodiphenylsilane, the publication is Industrial and Engineering Chemistry (1959), 791-96,1022, database is CAplus.

The latent heat of a substance can be determined by the equation l = [m’l'(1.003 – 0.66 P_r^0.74)]/(1.003 – 0.66 P_r^0.74), where l and l’ are latent heats, P_r and P_r‘ are reduced pressures, and m and m’ are constants, for unknown substance and reference substance. Values of m for more than 500 substances are given. Nomograms for the determination of latent heat and entropy of vaporization with illustrative examples for using them are given. The compounds included hydrocarbons, halogenated hydrocarbons, alcs., and polyols; aldehydes, ketones, ethers, acids, esters, N compounds, phenols, metallo?rg. compounds, B compounds, and Si compounds

Industrial and Engineering 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, Safety of Difluorodiphenylsilane.

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

Talvik, A. published the artcileThe inductive effect. III. The kinetics of the reaction of substituted benzoic acids with diphenyldiazomethane, Synthetic Route of 31719-76-3, the publication is Collection of Czechoslovak Chemical Communications (1964), 29(5), 1266-76, database is CAplus.

cf. CA 59, 9765h. The rate constants of the reaction of diphenyldiazomethane (I) with 19 derivatives of BzOH substituted in the m- and p-position were measured at 25¡ã. The substituents were groups of negligible mesomeric effect. The kinetics were followed by measurement of the polarographic wave height of I in 40% EtOH in the presence of 0.1M NaCl and an excess of BzOH derivative partially titrated with NaOH. The rate constants were in the range 0.28-0.83 l./mole sec.; the dependence of their logarithms on Hammett substituent coasts. is linear. The purely inductive effect is transmitted from the p-position of the C₆H₆ nucleus with a greater intensity than from the m-position; this result is in accord with findings of the preceding part of this series based on measurement of dissociation constants A table of rate constants is given. 32 references.

Collection of Czechoslovak Chemical Communications published new progress about 31719-76-3. 31719-76-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 4-(Phenoxymethyl)benzoic acid, and the molecular formula is C11H16BNO3, Synthetic Route of 31719-76-3.

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