Tag: M.W=200-250

Yang, Yuqing published the artcileA preliminary theoretical study on T_3,4CPP and its combination with Re=O, Related Products of catalysis-chemistry, the publication is Jisuanji Yu Yingyong Huaxue (2011), 28(2), 143-146, database is CAplus.

The mol. structure of meso-tetrakis 3,4-bis(carboxymethyleneoxy)phenyl porphyrin (T_3,4CPP) and the combination of Re = O with T_3,4CPP are studied using the DFT(d. functional theory) with B3LYP method. Their optimum geometry structures, FMO and combination energy are calculated and analyzed. The porphin ring in T_3,4CPP keeps good planarity and exactly similar geometry with sep. porphin ring. Also the combination energy of Re = O with T_3,4CPP on porphin ring is remarkably higher than that of Re = O with T_3,4CPP on carboxymethyleneoxy group of side chain. And stability of the former complex is much higher than that of the latter one. These imply that ¹⁸⁸Re = O should be labeled with T_3,4CPP on porphin ring while not on carboxymethyleneoxy group of side chain. It still shows that during combination of Re = O with T_3,4CPP on porphin ring, electron shifts from carbon atoms to nitrogen atoms. It still shows that after combination of Re = O with T_3,4CPP on porphin ring, the porphin ring deviates slightly (5.7 degree) from planarity to Re = O, and four nitrogen atoms slightly expand toward Re = O with the ring diameter deduced by 0.15-0.20 ?.

Jisuanji Yu Yingyong Huaxue 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 C18H17N5O3, Related Products of catalysis-chemistry.

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

Seo, Seung Woo published the artcileMicroreactor mediated deoxygenation of benzylic alcohols in a biphasic organic-aqueous medium, Application of Bis(4-fluorophenyl)methane, the publication is Tetrahedron Letters (2015), 56(21), 2795-2798, database is CAplus.

Safe and efficient deoxygenation of benzylic alcs. was accomplished using a droplet-based microreactor, which induced rapid mixing of the hydrophilic reagents (HI and H₃PO₂) in the aqueous phase and the alcs. in the organic phase. We investigated the relationship between the surface-to-volume ratio of the organic droplets and the reaction rate, and examined the effect of temperature and concentration of HI and H₃PO₂ in the reaction. The deoxygenated product was separated from the strongly acidic aqueous solution, and HI in the aqueous solution could be recycled. The reaction afforded 99% yield at 120 ¡ãC with HI (3.4 M HI) and H₃PO₂ (4.8 M).

Tetrahedron 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 C6H3BF4O2, Application of Bis(4-fluorophenyl)methane.

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

Wu, Haoran published the artcilePreparation of Copper Phosphate from Naturally Occurring Phytic Acid as an Advanced Catalyst for Oxidation of Aromatic Benzyl Compounds, Recommanded Product: Bis(4-fluorophenyl)methane, the publication is ACS Sustainable Chemistry & Engineering (2018), 6(11), 13670-13675, database is CAplus.

Both direct oxidation of aromatic benzyl compounds to aromatic ketones and utilization of naturally occurring chems. to prepare functional catalysts are highly attractive. Herein, copper phosphate was successfully synthesized by using naturally occurring phytic acid as the phosphorus source. The obtained copper phosphate showed excellent performance for the direct oxidation of aromatic benzyl compounds to aromatic ketones with N-hydroxyphthalimide (NHPI) as the radical promoter using O₂ as the oxidant. Addnl., the synthesized copper phosphate was stable in the reaction system and could be used at least four cycles without considerable decrease in catalytic performance. This work provides a new way to prepare efficient heterogeneous catalysts using naturally occurring chems. for the highly efficient oxidation of aromatic benzyl compounds to aromatic ketones.

ACS Sustainable Chemistry & Engineering 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 C15H14O3, Recommanded Product: Bis(4-fluorophenyl)methane.

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

Bochmann, Manfred published the artcileChalcogenolato complexes of bismuth and antimony. Syntheses, thermolysis reactions, and crystal structure of Sb(SC₆H₂Prⁱ₃-2,4,6)₃, Category: catalysis-chemistry, the publication is Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1995), 1649-52, database is CAplus.

Sb(III) and Bi(III) complexes of sterically demanding arenechalcogenolato ligands, M(EC₆H₂R’₃-2,4,6)₃ (E = S or Se; M = Sb or Bi; R’ = Me, Prⁱ or Bu^t) were prepared by either protolysis of the amides M[N(SiMe₃)₂]₃ with arenechalcogenols, or from MCl₃ by halide exchange (M = Bi or Sb). The complexes are monomeric in the solid state and sublime readily. The crystal structure of Sb(SC₆H₂Prⁱ₃-2,4,6)₃ was determined by x-ray diffraction. The compound possesses a trigonal-pyramidal geometry, with Sb-S distances of 2.418(2)-2.438(2) ? and S-Sb-S angles of 94.69(7)-98.29(8)¡ã. Preliminary x-ray results on Bi(SeC₆H₂Prⁱ₃-2,4,6)₃ showed that the compounds of Sb and Bi are isostructural. Thermolytic decomposition of some of the compounds was carried out in the solid state. Compounds with R’ = Me or Prⁱ undergo reductive elimination to give elemental Bi or Sb, whereas the bulky selenolates M(SeC₆H₂Bu^t₃-2,4,6)₃ afford M₂Se₃.

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, Category: catalysis-chemistry.

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

Mamiya, Mitsuo published the artcileSelective flotation of zinc hydroxide from gypsum precipitated in the neutralization process, Name: Dodecylamineacetate, the publication is Nippon Kogyo Kaishi (1986), 102(1186), 859-64, database is CAplus.

Floatability tests for Zn hydroxide and gypsum, both chem. precipitated, were carried out by using dodecylammonium acetate or Na dodecylsulfate as a collector with or without addition of soluble starch or Na silicate as a depressant of Zn hydroxide. Both precipitates are relatively floatable with either collector at pH 7-12, without depressant addition The addition of Na silicate depressed Zn hydroxide when Na dodecylsulfate was used. Selective flotation of gypsum from the mixture of both precipitates was successful by depressing Zn hydroxide with Na silicate. For synthetic mine water containing Zn²⁺ 1000, SO₄^2- 7328, and Ca²⁺ 603 mg/L, the lime precipitation-selective flotation method was investigated, with 90% gypsum recovery in the froth and 87% recovery of Zn hydroxide in the tailing solution

Nippon Kogyo Kaishi 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, Name: Dodecylamineacetate.

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

Li, Yuehui published the artcileSelective Methylation of Amines with Carbon Dioxide and H₂, Computed Properties of 2909-77-5, the publication is Angewandte Chemie, International Edition (2013), 52(46), 12156-12160, database is CAplus and MEDLINE.

Preparation of N-methylated products via ruthenium-catalyzed methylation of both aromatic and aliphatic amines using carbon dioxide/hydrogen is described. E.g., in presence of Ru(acac)₃, MeC(CH₂PPh₂)₃, and methanesulfonic acid, methylation of 4-ClC₆H₄NH₂ with CO₂/H₂ gave 99% 4-ClC₆H₄NMe₂.

Angewandte Chemie, International Edition 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, Computed Properties of 2909-77-5.

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

Medoks, G. V. published the artcileReaction of phenylmagnesium bromide with silicon tetrafluoride, Application of Difluorodiphenylsilane, the publication is Zhurnal Obshchei Khimii (1956), 113-15, database is CAplus.

Passage of SiF₄ into PhMgBr solution from 70.6 g. PhBr with ice cooling gave a reaction mixture which formed 2 liquid layers and some solid; after 24 hrs. the mixture was treated with cooling with 11% HCl, yielding 2.73 g. Ph₂SiF₂, b₂₈ 247-8¡ã (2.48 g. of less pure product also formed), and 59.5% Ph₃SiF, b₃₀ 245-50¡ã, m. 64¡ã. PhMgBr from 2.57 g. Mg was treated with SiF₄ as above for 20 min., and the 2-layered mixture was treated with an equal amount of PhMgBr solution as above, freed of Et₂O, and heated 1 hr. at 175-80¡ã, yielding after usual treatment 8.4 g. Ph₄Si (I), m. 230.5¡ã. In 5 days at room temperature PhMgBr and Ph₃SiF (4.17 g.) gave 0.85 g. I; at 180-2¡ã a 93% yield was obtained.

Zhurnal Obshchei Khimii 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, Application of Difluorodiphenylsilane.

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

Uyank, Sultan published the artcileMono 1,4-diaza-2,3-diborinane and bicyclic species: Synthesis and structures, HPLC of Formula: 140-28-3, the publication is Polyhedron (2017), 145-151, database is CAplus.

The derivatives of diazadiborinane containing a ring with two nitrogen atoms and two boron atoms are a class of 6-membered heterocyclic compounds Previous studies conducted on the synthesis of diazadiborinane showed that their structures are highly unstable and that some prepared isomer mixtures have no defined mono structure. New monocyclic 1,4-diaza-2,3-diborinane derivatives B₂{1,4-(NAr)₂C₂H₄} and the new bicyclic (B₂{1,2-(NAr)₂C₂H₄}₂) isomer were prepared The structures of these new derivatives were characterized using NMR (NMR) spectroscopy. The mol. and crystal structures of monocyclic and bicyclic species were determined using the single crystal X-ray diffraction technique.

Polyhedron published new progress about 140-28-3. 140-28-3 belongs to catalysis-chemistry, auxiliary class Benzenes, name is N1,N2-Dibenzylethane-1,2-diamine, and the molecular formula is C10H10O2, HPLC of Formula: 140-28-3.

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

Ho, Benedict Y. K. published the artcileFragmentation and rearrangement processes in the high resolution mass spectra of diphenylsilyl compounds, Related Products of catalysis-chemistry, the publication is Organic Mass Spectrometry (1975), 10(5), 361-9, database is CAplus.

High resolution mass spectra of Ph2SiR2 (R = H, F, Cl) and Ph2Si(OR1)2 (R1 = Et, Me, H) were recorded. Metastable defocusing experiments showed that, if R or OR1 can be readily lost stepwise, the relative abundance of the biphenyl radical ion (I) is small, whereas, if neutral Si species such as :SiR2, ¡¤SiR, or :Si(OR1)2 are readily eliminated, the relative abundance I is large. I originates from both odd- and even-electron ions.

Organic Mass Spectrometry 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, Related Products of catalysis-chemistry.

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

Damrauer, Robert published the artcileSynthesis of fluorosilanes from chlorosilanes: the use of hexafluorosilicates, Name: Difluorodiphenylsilane, the publication is Organometallics (1988), 7(5), 1161-4, database is CAplus.

The conversion of chlorosilanes to fluorosilanes has been studied by using sodium and ammonium hexafluorosilicate. Of particular interest has been their efficiency in the conversion of highly hindered chlorosilanes like dimesityldichlorosilane and (Me₃C)₂SiCl₂. (NH₄)₂SiF₆ was superior reagent for these conversions, since its reactions are more easily worked up and give higher yields. In addition, (NH₄)₂SiF₆ does not affect the Si-H, Si-Si, or Si-O-Si linkages as do many reagents which bring about chlorosilane to fluorosilane conversions.

Organometallics 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, Name: Difluorodiphenylsilane.

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