Tag: M.W:100-200

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called A Study on the Development of Chemical Vapor Deposition Precursors. 4. Syntheses and Characterization of New N-Alkoxo-β-ketoiminate Complexes of Niobium and Tantalum, published in 2002-04-30, which mentions a compound: 18362-64-6, mainly applied to ethoxide niobium tantalum alkoxoketoiminate complex preparation CVD precursor; thermal decomposition stability niobium tantalum ethoxide alkoxoketoiminate; tantalum oxide film preparation ethoxide alkoxoketoiminate complex precursor; niobium oxide film preparation ethoxide alkoxoketoiminate complex precursor; ketoiminate alkoxo niobium tantalum ethoxide complex preparation CVD precursor, Application In Synthesis of 2,6-Dimethyl-3,5-heptanedione.

Partial replacement of ethoxide ligands with N-alkoxo-β-ketoiminates in the tantalum or niobium ethoxides resulted in M(N-alkoxo-β-ketoiminate)(OEt)3 (M = Ta and Nb) complexes. Most of these complexes are liquid and showed enhanced thermal and chem. stability, especially toward moisture. These complexes have octahedral geometry with a meridional N-alkoxo-β-ketoiminate ligand and showed fluxional behaviors. All of these precursors, especially the ones with Me groups on both the N-alkoxo and β-ketoiminate backbones, demonstrate considerably higher deposition rates than M2(OEt)10 (M = Ta and Nb), one of the most popular precursors for Ta2O5 and Nb2O5 films. TGA experiments showed that successive decomposition of ethoxide ligands is followed by decomposition of N-alkoxo-β-ketoiminate in the pyrolysis process. Introduction of a Me group onto the N-hydroxyethyl backbone enhanced the thermal stability at lower temperatures and the pyrolysis rate at higher temperatures X-ray diffraction patterns indicate that the deposited films are not crystallized until the substrate temperature goes over 650°. Well-crystallized longish grains were formed in the Ta2O5 film deposited at 700°, but it was found from the depth profile spectra by Auger electron spectroscopy (AES) that the nitrogen and carbon impurities are 2.3% and 4.2%, resp., for the Ta2O5 film deposited at 550°. Heat treatment at 700° in oxygen removed the nitrogen impurity in this Ta2O5 completely, and the residual carbon is negligible from the AES and XPS results.

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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Feng, Fuxiang; Niu, Xiaopo; Wang, Li; Zhang, Xiangwen; Wang, Qingfa published the article 《TEOS-modified Ni/ZSM-5 nanosheet catalysts for hydroconversion of oleic acid to high-performance aviation fuel: Effect of acid spatial distribution》. Keywords: tetraethoxysilane nickel ZSM5 nanosheet catalyst; hydroconversion oleic acid aviation fuel spatial distribution.They researched the compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine( cas:111-18-2 ).Safety of N1,N1,N6,N6-Tetramethylhexane-1,6-diamine. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:111-18-2) here.

Ni/ZSM-5 nanosheet catalysts with different Si/Al ratios were modified by chem. liquid deposition (CLD) of tetraethoxysilane (TEOS) to tailor their acid spatial distribution. Their catalytic performance was evaluated with the hydroconversion of oleic acid to aviation-fuel-range-alkanes (AFRAs) at different reaction temperatures and H pressures. The modified catalysts inherit the nanosheet structure with decreased external Bronsted acid concentration, especially the strong one. External Bronsted acid sites mainly favor the cracking of the deoxygenated products (C17/C18). Internal Bronsted acid sites mainly enhance the isomerization of the linear AFRAs. The catalytic activity of the external Bronsted acid sites was more sensitive to reaction temperature than that of the internal ones. The deoxygenation and cracking reactions were also more sensitive to H pressure compared to the isomerization reaction. High AFRA selectivity of 51.4% as well as high iso/n-alkanes ratio of 1.7 were achieved at 250° and 10 bar over NS200(1).

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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Reference of N1,N1,N6,N6-Tetramethylhexane-1,6-diamine. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine, is researched, Molecular C10H24N2, CAS is 111-18-2, about Removal of Metal Ions in Phosphoric Acid by Electro-Electrodialysis with Cross-Linked Anion-Exchange Membranes. Author is Duan, Xiaoling; Wang, Cun-Wen; Wang, Tielin; Xie, Xiaolin; Zhou, Xingping; Ye, Yunsheng.

There are numerous metallic impurities in wet H3PO4, which causes striking neg. effects on industrial H3PO4 production The purification behavior of metallic impurities (Fe, Mg, Ca) from a wet H3PO4 solution employing the electroelectrodialysis (EED) technol. was studied. The cross-linked polysulfone anion-exchange membranes (AEMs) for EED were prepared using N,N,N’,N’-tetramethyl-1,6-hexanediamine (TMHDA) to achieve simultaneous crosslinking and quaternization without any cross-linkers or catalysts. The performance of the resulting membranes can be determined using quaternization reagents. When the molar ratio of trimethylamine/TMHDA/chloromethylated polysulfone is 3:1:1, the cross-linked membrane CQAPSU-3-1 exhibits lower H2O swelling and membrane area resistance than the noncross-linked membrane. The low membrane area resistance of CQAPSU-3-1 with long alkyl chains was obtained due to the hydrophilic-hydrophobic microphase separation structure formed by TMHDA. EED experiments with different initial H3PO4 concentrations of 0.52 and 1.07M were conducted to evaluate the H3PO4 purification of different AEMs. The EED experiments were more suitable for the purification of wet H3PO4 solution at low concentrations The H3PO4 concentration in the anode compartment could be increased from 0.52 to 1.04M. Through optimization, with an initial acid concentration of 0.52M, CQAPSU-3-1 exhibits an enhanced metallic impurity removal ratio of >72.0%, the current efficiency of >90%, and energy consumption of 0.48 kWh/kg. Therefore, CQAPSU-3-1 exhibits much higher purification efficiency than other membranes at a low initial H3PO4 concentration, suggesting its potential in H3PO4 purification application.

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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Manganese(III) Acetate Initiated Oxidative Free Radical Reactions between 2-Amino-1,4-naphthoquinones and β-Dicarbonyl Compounds, published in 2000-08-25, which mentions a compound: 18362-64-6, Name is 2,6-Dimethyl-3,5-heptanedione, Molecular C9H16O2, COA of Formula: C9H16O2.

Manganese(III) acetate oxidative free radical reaction between 2-amino-1,4-naphthoquinones and β-dicarbonyl compounds is described. With 2-anilino-1,4-naphthoquinone, benzo[b]acridine-6,11-dione and benzo[f]indole-4,9-diones were obtained. In most cases, benzo[b]acridine-6,11-dione is the major product. The reaction of 2-alkylamino-1,4-naphthoquinone with 1,3-diones gave benzo[f]indole as the only product. When 2-alkylamino-1,4-naphthoquinone was treated with β-keto esters, three benzo[f]indoles were obtained.

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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine(SMILESS: CN(C)CCCCCCN(C)C,cas:111-18-2) is researched.Reference of Bis[2-(1-isoquinolinyl-N)phenyl-C](2,4-pentanedionato-O2,O4)iridium(III). The article 《Direct synthesis of hierarchical zeolites through mesoporous 3D wormhole framework using single-head quaternary ammonium salt as structure-directing agent》 in relation to this compound, is published in Journal of Materials Science. Let’s take a look at the latest research on this compound (cas:111-18-2).

Hierarchical aluminosilicate zeolites with uniform mesoporosity were successfully synthesized by one-stage crystallization under constant temperature with a novel single-head quaternary ammonium salt ([C18H37-N+(CH3)2-C6H12-N(CH3)2]Br-) as mesoporogen and structure-directing agent (SDA). Through precisely controlling the molar ratio of Si/Al and synthetic time, the mesoporous 3D wormhole framework (MCM-48) and crystalline microporous MFI structure were simultaneously constructed, revealed by a series of in-depth characteristic studies. Combining the advantages of the significantly improved diffusion from the mesoporous MCM-48 and the strong framework acidity of the crystalline microporous MFI zeolite, the hierarchical aluminosilicate zeolites exhibited outstanding catalytic activity with good reusability towards bulky aldol condensation compared with the conventional meso- or microporous zeolites.

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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Electric Literature of C9H16O2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about Manganese(III) Acetate Initiated Oxidative Free Radical Reactions between 2-Amino-1,4-naphthoquinones and β-Dicarbonyl Compounds. Author is Jiang, Ming-Chyuan; Chuang, Che-Ping.

Manganese(III) acetate oxidative free radical reaction between 2-amino-1,4-naphthoquinones and β-dicarbonyl compounds is described. With 2-anilino-1,4-naphthoquinone, benzo[b]acridine-6,11-dione and benzo[f]indole-4,9-diones were obtained. In most cases, benzo[b]acridine-6,11-dione is the major product. The reaction of 2-alkylamino-1,4-naphthoquinone with 1,3-diones gave benzo[f]indole as the only product. When 2-alkylamino-1,4-naphthoquinone was treated with β-keto esters, three benzo[f]indoles were obtained.

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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Product Details of 111-18-2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine, is researched, Molecular C10H24N2, CAS is 111-18-2, about The influence of spacer composition on thermomechanical properties, crystallinity, and morphology in ionene segmented copolymers. Author is Liesen, Nicholas T.; Wang, Meng; Taghavimehr, Mehrnoosh; Lee, Jae Sang; Montazami, Reza; Hall, Lisa M.; Green, Matthew D..

A series of segmented ammonium ionenes with varying weight fractions of 2000 g mol-1 poly(ethylene glycol) (PEG) or poly(tetramethylene oxide) (PTMO) soft segments were synthesized, and a simplified coarse-grained model of these materials was implemented using mol. dynamics simulations. In addition to varying soft segment type (PTMO vs.PEG). Charge d. and soft segment content were varied to create a comprehensive series of segmented ammonium ionenes; thermogravimetric anal. reveals that all segmented ionenes in the series are thermally stable up to 240°C. Differential scanning calorimetry (DSC) and dynamic mech. anal. (DMA) show the formation of phase separated microdomains at low soft segment content. In particular, DSC shows that the hard and soft domains have distinct glass transition temperatures Similarly, simulations show that reduced soft segment content induces stronger microphase separation, reduces soft segment mobility, and increases ionic aggregate connectivity and size. These increased ionic associations result in elastomeric behavior, as evidenced by the higher rubbery plateau moduli observed at lower soft segment contents through DMA. Moreover, simulations show that ionic aggregation increases when switching from PEG to the less polar PTMO repeat units, which is consistent with DMA results showing higher plateau moduli for PTMO-based ionenes relative to PEG ionenes. DSC and X-ray diffraction determined that the degree of crystallinity increased with soft segment content regardless of segment type. Overall, these results suggest a semi-crystalline microphase-separated morphol. strongly influenced by charge d., the degree of ionic aggregation, and the resulting level of confinement and mobility of the soft segments.

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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Baghodrat, Mohsen; Mehri, Foad; Rowshanzamir, Soosan researched the compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine( cas:111-18-2 ).Related Products of 111-18-2.They published the article 《Electrochemical performance and enhanced nitrate removal of homogeneous polysulfone-based anion exchange membrane applied in membrane capacitive deionization cell》 about this compound( cas:111-18-2 ) in Desalination. Keywords: nitrate removal polysulfone anion exchange membrane capacitive deionization cell. We’ll tell you more about this compound (cas:111-18-2).

This paper aims to investigate different strategies toward the enhancement of nitrate removal in a membrane capacitive deionization cell using different membrane functionalizing agents such as trimethylamine, triethylamine, and N,N,N’,N’-tetramethyl-1,6-hexanediamine as well as a double-layer, novel homogeneous polysulfone-based anion exchange membrane. The prepared membranes exhibited nitrate vs. chloride transport number ratio in the range of 0.96-1.52. The salt adsorption capacity for the NaNO3 feed was about 1.4-fold compared to that of using NaCl in case of triethylamine functionalized membrane under individual feeding solutions of 30 mL NaCl or NaNO3 during 30 min, and adsorption/desorption voltages of 1.6/0.0 V process conditions. At the same time, this parameter was about 1.2-fold weaker for the cell with a double-layer membrane. Based on the experiments, it can be inferred that the affinity toward nitrate could be promoted as the chain length of the alkyl group increases (i.e., increasing hydrophobicity of the groups). However, due to decrement in water uptake, the overall electrochem. performance of the membranes tended to weaken as the affinity toward nitrate increased. Results showed that the prepared membranes are suitable substitutions to conventional polystyrene-based ones utilized in membrane capacitive deionization cells.

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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Design of removal agents for prevention of lithium intoxications. Chelating tendencies of model β-diketones, published in 1975, which mentions a compound: 18362-64-6, Name is 2,6-Dimethyl-3,5-heptanedione, Molecular C9H16O2, HPLC of Formula: 18362-64-6.

Formation constants for (Me2CRCO)2CH2 (R = Me, H) with Li+, Na+, K+, Rb+, Cs+ were determined to define the specificity for Li. While (Me3CCO)2CH2 can be used to sep. Li from the other ions, (Me2CHCO)2CH2 is even better and can, to a lesser extent, be used to sep. Na+ from K+, Rb+, and Cs+.

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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called A cyclic process on the recovery of copper from metal-sludge by solvent extraction, published in 1979-01-31, which mentions a compound: 18362-64-6, Name is 2,6-Dimethyl-3,5-heptanedione, Molecular C9H16O2, SDS of cas: 18362-64-6.

Cu in sludge was leached with NH3 solution, and the leach solution was extracted with di-isobutyryl methane [18362-64-6] in toluene. The Cu in the organic solvent was stripped with H2SO4, and recovered by electrolysis of the saturated CuSO4 solution The leach solution, the extracting reagent, and H2SO4 were recycled. Recovery of Cu from sludge was 90% and recovery from leach solution was 99%.

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Reference:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica