Tag: M.W=200-250

Piela, Katarzyna published the artcilePolymorphism and cold crystallization in optically nonlinear N-benzyl-2-methyl-4-nitroaniline crystal studied by X-ray diffraction, calorimetry and Raman spectroscopy, Quality Control of 201157-13-3, the publication is Journal of Molecular Structure (2011), 991(1-3), 42-49, database is CAplus.

Polymorphism of N-benzyl-2-methyl-4-nitroaniline (BNA), a terahertz emitter and frequency doubler, was detected and the crystal structures of orthorhombic and monoclinic polymorphs have been determined at room temperature The differential scanning calorimetry (DSC) revealed monotropic phase transition of the monoclinic BNA crystal at 362 K and during re-heating, after the molten BNA cooling, the cold crystallization of both polymorphs. The variable-temperature Raman spectra in the 700-1700 cm^-1 range evidenced the polymorphic transformation from the monoclinic to the orthorhombic structure, the latter stable in the wide temperature range. The comparison of the crystal structures, DSC curves, FT-IR and Raman spectra of the two polymorphs allowed the authors to recognize the N-H¡¤¡¤¡¤O hydrogen bond in the orthorhombic and C-H¡¤¡¤¡¤O hydrogen bond in the monoclinic one as well as other intermol. interactions. The role of dynamic disorder, intra- and intermol. charge transfers in the mol. mechanism of optical nonlinearity is discussed.

Journal of Molecular Structure published new progress about 201157-13-3. 201157-13-3 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is N-Benzyl-2-methyl-4-nitroaniline, and the molecular formula is C14H14N2O2, Quality Control of 201157-13-3.

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

Choi, Zel-Ho published the artcileOn the chemistry of fluoroorgano derivatives of Group 13 elements. Part 2. Synthesis and characterization of the 1:1-adducts of In(C₆F₅)₃ with acetonitrile, glyme, and DMAP [DMAP = 4-(N,N-dimethylamino)pyridine], and [PNP][In(C₆F₅)₄] [PNP = bis(triphenylphosphine)immonium]. The crystal structure of [PNP][In(C₆F₅)₄], COA of Formula: C9H9F5Si, the publication is Zeitschrift fuer Anorganische und Allgemeine Chemie (1999), 625(8), 1287-1292, database is CAplus.

In(C₆F₅)₃.MeCN and In(C₆F₅)₃.glyme were synthesized from InCl₃ and Cd(C₆F₅)₂ in MeCN or glyme in 43% and 35% yield, resp. Replacement of MeCN or Et₂O by DMAP yielded the corresponding 1:1-adduct. [PNP][In(C₆F₅)₄] was best prepared from the corresponding Cs salt which was best synthesized from the reaction of stoichiometric amounts of In(C₆F₅)₃.MeCN, Me₃SiC₆F₅, and CsF in good yield. [PNP][In(C₆F₅)₄] crystallizes in the triclinic space group P1? [a 1104.9(4), b 1442.4(6), c 1833.8(8) pm, ¦Á 110.87(2), ¦Â 92.04(3), ¦Ã 96.55(3)¡ã, Z = 2].

Zeitschrift fuer Anorganische und Allgemeine Chemie 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, COA of Formula: C9H9F5Si.

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

Hegemann, Corinna published the artcileSynthetic and Structural Investigations on the Reactivity of the Cd-I Bond in [ICd{Zr₂(OPrⁱ)₉}] to Construct New Mixed-Metal Alkoxides, COA of Formula: C9H9F5Si, the publication is Organometallics (2013), 32(6), 1654-1664, database is CAplus.

New mixed-metal alkoxides [XCd{Zr₂(OPrⁱ)₉}]_n (X = -C₂F₅, -C₆F₅, -C₆F₄-4-H, -NO₃, -NCO, -SO₃CF₃, -O₂CCF₃, -O₂CC₂F₅, -O₂CCH₃, -ClO₄, -CN, -SO₄; n = 1, 2) were obtained by the scission of the Cd-I bond in the iodo heterobimetallic isopropoxide [ICd{Zr₂(OPrⁱ)₉}] (1), whereby the underlying synthetic strategies involve metathesis reactions with Ag salts or Lewis acid-base interactions between the Bronsted acid [Zr(OPrⁱ)₄(HOPrⁱ)]₂ and bis(fluoroorgano)cadmium (Cd(R_f)₂) compounds The new compounds were characterized by multinuclear NMR spectroscopy, elemental anal., and mass spectrometry. The results of x-ray diffraction anal. of [(F₅C₆)Cd{Zr₂(OPrⁱ)₉}] (2), [(4-H-F₄C₆)Cd{Zr₂(OPrⁱ)₉}] (3), [(F₅C₂)Cd{Zr₂(OPrⁱ)₉}]₂ (4), [(ONO₂)Cd{Zr₂(OPrⁱ)₉}]₂ (5), [(CH₃CO₂)Cd{Zr₂(OPrⁱ)₉}] (6), [(O₂ClO₂)(H₅C₃N)Cd{Zr₂(OPrⁱ)₉}] (7), [(¦Ì-O₂ClO₂)Cd{Zr₂(OPrⁱ)₉}]₂ (8), [(¦Ì-O₂CCF₃)Cd{Zr₂(OPrⁱ)₈(O₂CCF₃)}]₂ (9), [(¦Ì-O₂CC₂F₅)Cd{Zr₂(OPrⁱ)₈(O₂CC₂F₅)}]₂ (10), [(¦Ì(O,N)-OCN)Cd{Zr₂(OPrⁱ)₉}]₂ (11), and [(¦Ì-O₂SOCF₃)Cd{Zr₂(OPrⁱ)₉}]₂ (12) revealed the mol. framework to be formally constituted by tetradentate coordination of a nonaisopropoxo dizirconate unit, {Zr₂(OPrⁱ)₉}^–, to a CdX⁺ unit. In solution and in the solid state, 1–7 exist as monomers, whereas compounds 8–12 form dimers.

Organometallics 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, COA of Formula: C9H9F5Si.

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

Inoue, Toshio published the artcileTreatment of metallurgical wastes containing heavy metals. II. Separation of lead sulfate and ferric oxide with dodecylamine acetate. With special reference to the effect of starch and arabic gum as a ferric oxide depressor, Quality Control of 2016-56-0, the publication is Sogo Shikensho Nenpo (Tokyo Daigaku Kogakubu) (1980), 191-7, database is CAplus.

PbSO₄ and Fe₂O₃ were flotated from a solution containing no metal ions by dodecylamine acetate [2016-56-0] in the pH range 0-11 and 2-8, resp. When the same floatation tests were conducted in the solution containing 50 g ZnSO₄/L, the flotation of PbSO₄ was decreased to pH <3. Starch was the most effective depressor for separation of PbSO₄ and Fe₂O₃ by flotation at pH 2.7. The Pb recovery was 90.9%.

Sogo Shikensho Nenpo (Tokyo Daigaku Kogakubu) 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, Quality Control of 2016-56-0.

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

Inoue, Toshio published the artcileA study on the treatment of metallurgical wastes containing heavy metals. III. Flotation of lead sulfate in the red residue of a hydrometallurgical zinc smelter, Computed Properties of 2016-56-0, the publication is Sogo Shikensho Nenpo (Tokyo Daigaku Kogakubu) (1981), 159-64, database is CAplus.

The leaching red residue from a Zn smelter contains 6-10% Pb as Pb-SO₄. Zn ions are removed by washing and residual flocculant is removed by attrition grinding. The flotation pulp is heated to 35-45¡ã and treated with C_12-16 amine acetate and Na hexadecyl sulfate. Flotation with combined depressants, starch, and gum arabic and 3-stage cleaning gives a concentrate containing 39-42 % Pb for a recovery of 68-70%.

Sogo Shikensho Nenpo (Tokyo Daigaku Kogakubu) 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, Computed Properties of 2016-56-0.

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

Stoll, Emma L. published the artcileA practical catalytic reductive amination of carboxylic acids, Safety of 2-(2-((tert-Butyldimethylsilyl)oxy)ethoxy)ethan-1-amine, the publication is Chemical Science (2020), 11(35), 9494-9500, database is CAplus and MEDLINE.

Reductive alkylation reactions of amines using carboxylic acids as nominal electrophiles was reported. The two-step reaction exploits the dual reactivity of phenylsilane and involves a silane-mediated amidation followed by a Zn(OAc)₂-catalyzed amide reduction The reaction is applicable to a wide range of amines and carboxylic acids and has been demonstrated on a large scale (305 mmol of amine). The rate differential between the reduction of tertiary and secondary amide intermediates is exemplified in a convergent synthesis of the antiretroviral medicine maraviroc. Mechanistic studies demonstrate that a residual 0.5 equiv of carboxylic acid from the amidation step is responsible for the generation of silane reductants with augmented reactivity, which allow secondary amides, previously unreactive in zinc/phenylsilane systems, to be reduced.

Chemical Science published new progress about 215297-17-9. 215297-17-9 belongs to catalysis-chemistry, auxiliary class Linker,PROTAC Linker, name is 2-(2-((tert-Butyldimethylsilyl)oxy)ethoxy)ethan-1-amine, and the molecular formula is C8H15BrO2, Safety of 2-(2-((tert-Butyldimethylsilyl)oxy)ethoxy)ethan-1-amine.

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

Duro, Jose Antonio published the artcileSynthesis and aggregation properties in solution of a new octasubstituted copper phthalocyanine: {2,3,9,10,16,17,23,24-octakis[(dioctylaminocarbonyl)methoxy]phthalocyaninato}copper(II), Application In Synthesis of 5411-14-3, the publication is Chemische Berichte (1993), 126(1), 269-71, database is CAplus.

The preparation of CuL (H₂L = 2,3,9,10,16,17,23,24-octakis[(dioctylaminocarbonyl)methoxy]phthalocyanine), highly soluble in organic solvents, is described. Its aggregation properties in different solvents and in the presence of alk., alk. earth, and NH₄⁺ salts were studied.

Chemische Berichte 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, Application In Synthesis of 5411-14-3.

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

Mannekens, Els published the artcileEfficient synthesis of 1-benzyloxyphenyl-3-phenylacetones, Category: catalysis-chemistry, the publication is Synthesis (2000), 1214-1216, database is CAplus.

1-[(Benzyloxy)phenyl]-3-phenylacetones (I) were conveniently synthesized by acylation of the PhCH₂Li-DABCO complex with their resp. N-Me O-Me hydroxamates. In four steps, the ketones I having ortho-, meta- and para-benzyloxy substituents were obtained in 42-51% overall yields from com. available 2-(hydroxyphenyl)acetic acids.

Synthesis published new progress about 1860-58-8. 1860-58-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(3-(Benzyloxy)phenyl)acetic acid, and the molecular formula is C15H14O3, Category: catalysis-chemistry.

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

Spialter, Leonard published the artcileNovel synthesis of organotri- and difluorosilanes with aqueous hydrofluoric acid, COA of Formula: C12H10F2Si, the publication is Tetrahedron Letters (1960), 11-14, database is CAplus.

In the presence of excess concentrated aqueous HF no hydrolysis products of halosilanes were isolated. Freshly distilled EtSiCl₃ (25.0 g., b₇₄₅ 96.5¡ã) and 95 g. 48% HF shaken 1 hr. at 0¡ã in a polyethylene bottle and the evolved gases trapped at -78.5¡ã (solid CO₂) yielded 88-90% EtSiF₃, b. -5¡ã, d_-76.5 1.227. Similarly, 26.4 g. PhSiCl₃ (b₇₃₇ 197-9¡ã) and 78.0 g. 48% HF shaken vigorously 2 hrs. at 0¡ã and the washed (H₂O) and dried (anhydrous Na₂SO₄) solution treated with NaF (to adsorb excess HF) yielded 85% PhSiF₃, b₇₃₇ 98-104¡ã, n²²_D 1.4103. PhSiCl₃ (52.8 g.) with 156 g. 48% HF in 200 ml. C₅H₁₂ shaken at 0¡ã with 50.0 g. 48% HF gave 43.5 g. Ph₂SiF₂, b₇₃₇ 260-5¡ã, n²⁵_D 1.5536. Under similar conditions (Ph₃Si)₂O was not cleaved to Ph₃SiF, suggesting that siloxane formation may not take place prior to establishment of the Si-F bond and that either direct halogen substitution or interaction with the initial hydrolytic products of the chlorosilane may be steps in the mechanism.

Tetrahedron 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 C6H8O6, COA of Formula: C12H10F2Si.

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

Liu, Xiao-Jun published the artcileThe influence of NHCs on C-Si and C-C reductive elimination: a computational study of the selectivity of Ni-catalyzed C-H activation of arenes with vinylsilanes, Recommanded Product: Trimethyl(perfluorophenyl)silane, the publication is Chemical Communications (Cambridge, United Kingdom) (2018), 54(57), 7912-7915, database is CAplus and MEDLINE.

D. functional theory calculations were performed to investigate the mechanism and origins of the NHC-controlled selectivity of Ni-catalyzed C-H activation of arenes with vinylsilanes. The key to the selectivity is the different impacts of NHCs on the C-Si/C-C reductive elimination of the square-planar/T-shaped intermediate.

Chemical Communications (Cambridge, United Kingdom) 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, Recommanded Product: Trimethyl(perfluorophenyl)silane.

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