Month: December 2022

Shamsipur, Mojtaba published the artcileAn efficient and selective fluorescent optode membrane based on 7-[(5-chloro-8-hydroxy-7-quinolinyl)methyl]-5,6,7,8,9,10-hexahydro-2H-1,13,4,7,10-benzodioxatriazacyclopentadecine-3,11(4H,12H)-dione as a novel fluoroionophore for determination of cobalt(II) ions, Formula: C10H10O6, the publication is Analytica Chimica Acta (2008), 630(1), 57-66, database is CAplus and MEDLINE.

A novel fluorescence chem. sensor for the highly sensitive and selective determination of Co²⁺ ions in aqueous solutions is prepared The cobalt sensing system was prepared by incorporating 7-[(5-chloro-8-hydroxy-7-quinolinyl)methyl]-5,6,7,8,9,10-hexahydro-2H-1,13,4,7,10-benzodioxatriazacyclopentadecine-3,11(4H,12H)-dione (L) as a neutral cobalt-selective fluoroionophore in the plasticized PVC membrane containing sodium tetraphenylborate as a liphophilic anionic additive. The response of the sensor is based on the strong selective fluorescence quenching of L by Co²⁺ ions. At a pH 5.0, the proposed sensor displays a calibration curve over a wide concentration range of 5.0 ¡Á 10^-7 to 2.0 ¡Á 10^-2 M with a relatively fast response time of <5 min. In addition to high stability and reproducibility, the sensor shows a unique selectivity towards Co²⁺ ion with respect to common coexisting cations. The proposed fluorescence optode was successfully applied to the determination of cobalt content of vitamin B12 ampul, cobalt cake, cobalt alloy and tap water samples.

Analytica Chimica Acta 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 C6H17NO3Si, Formula: C10H10O6.

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

Otsuki, Akira published the artcileObservation of aggregate structure of green and blue fluorescent powders suspended in heptane by interactive force measurement, Safety of Dodecylamineacetate, the publication is International Journal of the Society of Materials Engineering for Resources (2006), 13(2), 86-91, database is CAplus.

Three kinds of fluorescent powders were separated by means of organic liquid-liquid extraction for the recycling purpose. The effect of surfactant concentration on the separation of the fluorescent powders was observed In this study, the effect was analyzed by observing aggregate structure of the green and blue fluorescent powders using an exptl. apparatus, which measured the interactive force between two surfaces of glass hemisphere and flat plate under elec. field. The maximum distance between two surfaces is 20 ¦Ìm. The size of aggregates and adsorption state of green and blue fluorescent powders in heptane containing a certain amount of surfactant was measured. This method would be very useful for measuring the size of aggregate and the adsorption state of ultra fine particles dispersed in solution

International Journal of the Society of Materials Engineering for Resources 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, Safety of Dodecylamineacetate.

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

Zhang, Zongchao published the artcileFTIR study of novel palladium trimethylphosphine carbonyl clusters encaged in zeolite Y, HPLC of Formula: 6972-05-0, the publication is Polyhedron (1991), 10(7), 673-81, database is CAplus.

Green Pd(Me₃P)(CO)₂ (TMPC) clusters in zeolite Y were prepared using a ship-in-a-bottle method. Me₃P (TMP) ligands stabilize Pd clusters of small nuclearity; they preferentially coordinate to the corner Pd atoms. Absorption bands of triply-bonded CO (1886 cm^-1) are observed only for samples with initially large Pd nuclearity (x > 4). Bands at 1960 and 1950 cm^-1, attributed to doubly-bonded CO in a butterfly configuration, dominate the IR spectra. The Pd core in Pd TMPC clusters is electron-rich, in comparison to Pd single crystals, due to electron donation from phosphorus to the Pd. The spectra of the zeolite encaged clusters differ from those reported for PdR₃P (R = alkyl) such as Et and Bu) clusters in solution with nuclearity varying 4-38. Zeolite encaged Pd TMPC clusters are stable at 200¡ã in a flow of H₂ + CO. At 300¡ã, the TMP ligands decompose and poison the Pd particles.

Polyhedron published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C10H10O2, HPLC of Formula: 6972-05-0.

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

Shin, Jai Moo published the artcile1-arylsulfonyl-2-(pyridylmethylsulfinyl) benzimidazoles as new proton pump inhibitor prodrugs, Recommanded Product: 2,2-(1,2-Phenylenebis(oxy))diacetic acid, the publication is Molecules (2009), 14(12), 5247-5280, database is CAplus and MEDLINE.

New arylsulfonyl proton pump inhibitor (PPI) prodrug forms were synthesized. These prodrugs provided longer residence time of an effective PPI plasma concentration, resulting in better gastric acid inhibition.

Molecules 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 C19H21N3O3S, Recommanded Product: 2,2-(1,2-Phenylenebis(oxy))diacetic acid.

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

Niu, Ben published the artcilePhotoredox Polyfluoroarylation of Alkyl Halides via Halogen-Atom-Transfer, SDS of cas: 118-90-1, the publication is Organic Letters (2022), 24(3), 916-920, database is CAplus and MEDLINE.

The first polyfluoroarylation of unactivated alkyl halides RX (R = n-nonyl, cyclohexyl, adamantan-1-yl, 1-[(thiophen-2-yl)carbonyl]piperidin-4-yl, etc.; X = I, Br) e.g., I via halogen-atom-transfer process was described. This method converts primary, secondary, and tertiary alkyl halides into the resp. polyfluoroaryl compounds e.g., 3-(perfluorophenyl)butyl 4-methoxybenzoate in good yields in the presence of amide, carbamate, ester, aromatic and sulfonamide moieties including derivatives of complex bioactive mols. Mechanistic work revealed that this transformation proceeds through an alkyl radical generated after a halogen-atom-transfer.

Organic Letters published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, SDS of cas: 118-90-1.

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

Pinfold, Harry published the artcileDetermining the Relative Structural Relevance of Halogen and Hydrogen Bonds in Self-Assembled Monolayers, Synthetic Route of 191-07-1, the publication is Journal of Physical Chemistry C (2021), 125(50), 27784-27792, database is CAplus.

Although hydrogen bonds have long been established as a highly effective intermol. interaction for controlling the formation of self-assembled monolayers, the potential utility of the closely related halogen bonds has only recently emerged. The synergistic use of both halogen and hydrogen bonds provides a unique, multitiered strategy toward controlling the morphol. of self-assembled structures. However, the interplay between these two interactions within monolayer systems has been little studied. Here, we have systematically investigated this interplay in self-assembled monolayers formed at the solid-liquid interface, with a specific attention on determining the structural relevance of the two interactions in the formation of 2D supramol. structures. A single mol. which can simultaneously act as both a halogen and hydrogen bond donor was paired with mols. which are effective acceptors for both of these interactions. The bimol. networks that result from these pairings were studied using scanning tunnelling microscopy coupled with d. function theory calculations Addnl. measurements on similar networks formed by using structural analogs in which halogen bonding interactions are no longer possible give significant insight into the structure-determining role of these interactions. We find that in some monolayer systems the halogen bonds serve no significant structure-determining role and the assembly is dominated by hydrogen bonding; however, in other systems, effective cooperation between the two interactions is observed This study gives clear insight into the synergistic and competitive balance between halogen and hydrogen bonds in self-assembled monolayers. This information is expected to be of considerable value for the future design of monolayer systems using both halogen and hydrogen bonds.

Journal of Physical Chemistry C published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Synthetic Route of 191-07-1.

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

Peterson, John R. published the artcileSynthesis and experimental ionization energies of certain (E)-3-arylpropenoic acids and their methyl esters, Formula: C11H12O4, the publication is Journal of Chemical and Engineering Data (1988), 33(4), 534-7, database is CAplus.

Ionization energies for methoxy-substituted (E)-3-arylpropenoic acids and Me (E)-3-arylpropenoates were exptl. determined by mass spectroscopy. The title compounds were prepared in excellent yield by Knoevenagel condensation of an aromatic aldehyde with malonic acid and by Fischer esterification of the acid with methanol.

Journal of Chemical and Engineering Data published new progress about 16909-09-4. 16909-09-4 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Benzene,Ether, name is (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, and the molecular formula is C11H12O4, Formula: C11H12O4.

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

Wehmschulte, Rudolf J. published the artcileSynthesis and Structure of Unassociated Mono-, Di- and Trithiolate Derivatives of Aluminum and Gallium: Investigation of Al-S and Ga-S ¦Ð-Bonding, Application of 2,4,6-Triisopropylbenzenethiol, the publication is Inorganic Chemistry (1995), 34(10), 2593-9, database is CAplus.

The synthesis and characterization of several sterically crowded Al and Ga thiolates are described. The major reason for these studies was the study of the possible occurrence of ¦Ð-bonding in Al-S and Ga-S bonds and the determination of the steric requirements for the isolation of monomeric heavier main Group 3 thiolates in the solid state. The compounds examined were RAl(SMes^*)₂ (R = Bu, 1; t-Bu, 2), Mes^*₂GaSR (Mes^* = 2,4,6-t-Bu₃C₆H₂, R = Me,3; Ph, 4), BuGa(SMes^*)₂, (5) (t-Bu₂AlSTrip)₂ (6) (Trip = 2,4,6-i-Pr₃C₆H₂), (THF)Al(STrip)₃ (7). They were characterized by x-ray crystallog. (1–3, 5–7) and by NMR and IR spectroscopy. The M-S, p-p, ¦Ð-bonding is weak and has an upper limit of 8-9 kcal mol^-1. Restricted rotation around an M-S bond was detected only in the cases of 3 and 4. Crystal data at 130 K with Mo K¦Á (¦Ë = 0.710 69 ?) (2, 5–7) or Cu K¦Á (¦Ë = 1.541 78 ?) (1, 3) radiation; 1, C₄₀H₆₇AlS₂, a 18.563(5), b 27.171(11), c 32.089(4) ?, orthorhombic, Z = 16 (two independent mols.), space group Pbca, R = 0.087 for 6746 (I > 2¦Ò(I)) reflections; 2, C₄₀H₆₇AlS₂, a 17.375(9), b 27.982(10), c 17.868(8) ?, ¦Â 112.29(2)¡ã, Z = 8 (two independent mols.), monoclinic, space group P2₁/c, R = 0.082 for 8425 (I > 2¦Ò(I)) reflections; 3, C₃₇H₆₁GaS, a 33.654(8), b 10.433(4), c 20.258(8) ?, Z = 8, orthorhombic, space group Pbcn, R = 0.066 for 3164 (I > 2¦Ò(I)) reflections; 5, C₄₀H₆₇GaS₂, a 18.521(8), b 27.342(10), c 32.046(12) ?, orthorhombic, Z = 16 (two independent mols.), space group Pbca, R = 0.144 for 3297 (I > 2¦Ò(I)) reflections; 6, C₄₆H₈₂Al₂S₂, a 20.820(8), b 14.598(6), c 16.118(4) ?, Z = 4, orthorhombic, space group Pna2₁, R = 0.062 for 2469 (I > 2.5¦Ò(I)) reflections; 7, (THF)Al(STrip)₃¡¤0.5C₆H₁₄, C₅₂H₈₄AlOS₃, a 15.589(6), b 13.622(5), c 26.308(12) ?, ¦Â 99.88(4)¡ã, Z = 4, monoclinic, space group P2₁/c, R = 0.075 for 5697 (I > 3¦Ò(I)) reflections.

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 C18H23N3O4S, Application of 2,4,6-Triisopropylbenzenethiol.

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

MacDonnell, Frederick M. published the artcileSterically Encumbered Iron(II) Thiolate Complexes: Synthesis and Structure of Trigonal Planar [Fe(SR)₃]^– (R = 2,4,6-t-Bu₃C₆H₂) and Moessbauer Spectra of Two- and Three-Coordinate Complexes, Related Products of catalysis-chemistry, the publication is Inorganic Chemistry (1995), 34(7), 1815-22, database is CAplus.

The synthesis and structural characterization of three compounds containing three-coordinate Fe(II) and stabilized by sterically encumbered thiolate ligands are reported. Reaction of [Fe₂(SC₆H₂-2,4,6-t-Bu₃)₄] (3) with LiSC₆H₂-2,4,6-t-Bu₃ in ether/THF/hexane afforded [Li(THF)₂(5)]¡¤0.5C₆H₁₄ (5 = [Fe(SC₆H₂-2,4,6-t-Bu₃)₃]^–). Addition of Ph₄PCl to a reaction mixture in toluene followed by recrystallization of the product from MeCN yielded (Ph₄P)[5]¡¤2MeCN¡¤C₇H₈. [Fe₃(SC₆H₂-2,4,6-i-Pr₃)₄(N(SiMe₃)₂)₂] was prepared by the reaction of [Fe(N(SiMe₃)₂)₂] (6) with the thiol in toluene. [Li(THF)₂(5)]¡¤0.5C₆H₁₄ crystallizes in monoclinic space group P2₁/c with a 9.809(2), b 22.507(5), c 29.553(5) ?, ¦Â 95.72(2)¡ã, and Z = 4 (130 K). (Ph₄P)[5]¡¤2MeCN¡¤C₇H₈ was obtained in monoclinic space group P2₁ with a 17.538(5), b 14.912(4), c 17.608(5) ?, ¦Â 115.71(3)¡ã, and Z = 2 (143 K). These compounds contain the 1st example of mononuclear Fe(II) in a close approach to a trigonal planar [5] or a distorted trigonal planar [Li(THF)₂(5)] S coordination environment. In the Ph₄P salt, [5] exhibits the mean values Fe-S = 2.274(9) ? and S-Fe-S = 120(3)¡ã, while in [Li(THF)₂(5)] the Li⁺ ion bridges two S atoms, causing a lengthening (0.06-0.07 ?) of the Fe-S bridged bond lengths and constriction of the bridged S-Fe-S angle (92.2(1)¡ã). Compound 6 crystallizes in space group P2₁/c with a 14.521(5), b 41.60(2), c 14.241(4) ?, ¦Â 100.42(2)¡ã, and Z = 4 (130 K). The structure has a linear Fe₃(¦Ì₂-SR)₄ fragment with an almost linear Fe₃ array involving the central Fe(II) atom in a severely distorted tetrahedral environment; the terminal Fe(II) atoms are three-coordinate and planar with terminal N(SiMe₃)₂ ligands. Complex 5 expands the family of homoleptic mol. Fe(II) thiolates to five structural types; complexes 5 and 6 with two previously reported species [Fe₂(SR)₄] constitute the known examples of three-coordinate Fe^II with partial or complete S ligation. The zero-field Moessbauer spectra of examples of the five types of homoleptic Fe(II) thiolates are reported together with several tetrahedral complexes having Fe^II-S/SR coordination to determine what structural distinctions could be made from isomer shifts and quadrupole splittings. From the limited data set, it is tentatively concluded that trigonal planar Fe^II(SR)₃ can be distinguished from tetrahedral Fe^II(SR)₄ and Fe^II-S/SR units from its smaller quadrupole splitting (0.81 mm/s for 5 at 4.2-100 K).

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, Related Products of catalysis-chemistry.

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

Govers, H. published the artcileExperimental determination and prediction of partition coefficients of thioureas and their toxicity to Photobacterium phosphoreum, Product Details of C3H8N2S, the publication is Chemosphere (1986), 15(4), 383-93, database is CAplus.

The partition coefficients between n-octanol and water of 11 thioureas (e.g., thiourea??[62-56-6] and N-methylthiourea??[598-52-7]) were determined via the shake-flask method. Moderately high to high correlation coefficients were calculated for the linear correlation between these partition coefficients and HPLC capacity factors, mol. connectivity indexes, Rekker partition coefficients, and mol. weight The combined ¹¦Ö^v plus ⁵¦Ö^vCH/⁶¦Ö^vCH (ring-) connectivity indexes were the best predictors. A crude Rekker fragmental value of 2.72 was derived for the thioureic fragment (NCSN). The toxicities of 10 thioureas to P. phosphoreum, determined via the microtox test, appeared to be correlated moderately high to partition coefficients as well as HPLC capacity factors, mol. connectivity, and mol. weight

Chemosphere published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, Product Details of C3H8N2S.

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