Category: 18362-64-6

Ribeiro da Silva, Manuel A. V.; Irving, R. J. published the article 《Experimental determination of the molar enthalpies of vaporization for some β-diketones》. Keywords: heat evaporation diketone estimation; methyl heptanedione heat evaporation; fluoro pentanedione heat evaporation.They researched the compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6 ).Application of 18362-64-6. 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:18362-64-6) here.

The measured heats of evaporation at 298.15 K are, in kcal/mol; 2,6-diMe-3,5-heptanedione (13.40); 2,2-diMe-3,5-heptanedione (13.59); 2,2,6-triMe-3,5-heptanedione (13.80); 2,2,6,6-tetraMe-3,5-heptanedione (14.23); 1,1,1-trifluoro-2,4-pentanedione (8.90) and 1,1,1,5,5,5-hexafluoro-2,4-pentanedione (7.31). Attempt was made to determined mol. structure group contribution factors for the heals of evaporation of this group of compounds

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Sharpe, Paul; Alameddin, N. George; Richardson, David E. published the article 《Alkyl Substituent Effects in the Redox Thermochemistry of Coordination Compounds: Oxidation and Reduction Energetics for Ruthenium Tris(β-diketonate) Complexes in Solution and the Gas Phase》. Keywords: ruthenium diketonato oxidation reduction thermodn phase; ketonato ruthenium oxidation reduction thermodn phase; free energy ruthenium diketonato oxidation reduction; energetic ruthenium diketonato oxidation reduction phase; oxidation ruthenium diketonato substituent thermodn phase; reduction ruthenium diketonato substituent thermodn phase; solvation ruthenium diketonato oxidation reduction thermodn; substituent ruthenium diketonato oxidation reduction thermodn.They researched the compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6 ).Product Details of 18362-64-6. 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:18362-64-6) here.

Alkyl substituent effects in gas-phase and solution redox thermochem. were studied for Ru coordination complexes. The gas-phase free energies of ionization (ΔGi°) and electron attachment (ΔGa°) are compared to electrochem. oxidation and reduction half-wave potentials (E1/2) for six Ru tris(β-diketonate) complexes prepared by a known method (RuL3, where L = CH(COR)2- and R = Me, Et, Pr, Bu, isoPr, and tert-Bu). Values for ΔGi° and ΔGa° were determined from electron-transfer equilibrium measurements by using Fourier transform ICR mass spectrometry. Substituted benzenes and metallocenes were used as reference compounds Cyclic voltammetry was used to determine E1/2 values, which were obtained in DMF and measured relative to the ferrocene/ferrocenium couple. Substitution of Me with larger substituents results in cathodic shifts in both oxidation and reduction potentials, and the solution data correlate well with the sums of Taft alkyl substituent parameters (σI). Gas-phase cations and anions are stabilized relative to the neutral by larger alkyl substituents, rendering ΔGi° less endoergic and ΔGa° more exoergic as the alkyl group size increases. The trends for solution and gas-phase reduction of the neutral Ru(III) complex are therefore reversed. Estimates for the differential solvation free energies for 1-electron oxidation (ΔΔGsolv°(0/+)) and reduction (ΔΔGsolv°(0/-)) are obtained by combining the ΔGi° and ΔGa° data with electrochem. E1/2 data. Values of ΔΔGsolv°(0/-) are less exoergic for complexes with larger alkyl substituents and range from -48 ± 5 kcal mol-1 (R =Me) to -36 ± 5 kcal mol-1 (R = tert-butyl), and these changes in ΔΔGsolv°(0/-) are identified as the cause of the reversal in the trends for gas-phase and solution reduction free energies. But ΔΔGsolv°(0/+) values all fall in the range -19 to -16 kcal mol-1 and show no correlation with the size of the alkyl substituents. Anal. of the gas-phase data by a model of substituent effects based on polarizability and inductive contributions of a group shows that alkyl inductive effects are small in these complexes and that relative stabilities of gas-phase ions are primarily due to differences in polarizability of the alkyl substituents R on the ligands. A similar anal. for R = CF3 complexes suggests that the substantial effect of that group on gas-phase ionization and electron-attachment energies is almost entirely due to a large inductive effect.

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Formula: C9H16O2. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about Highly efficient enantio-differentiating hydrogenation catalyst prepared from ultrasonicated Raney nickel by asymmetric modification. Author is Tai, A.; Kikukawa, T.; Sugimura, T.; Inoue, Y.; Abe, S.; Osawa, T.; Harada, T..

Irradiation of ultrasound on Raney nickel catalyst in water and removing the resulting turbid supernatant from the rest gave excellent nickel (RNi-U) for asym. modified nickel catalyst. SEM-XMA studies clarified that the treatment of RNi by ultrasound effectively smashed off the aluminum enriched particle from the catalyst. The tartaric acid-NaBr-modified RNi-U(TA-NaBr-MRNi-U) showed high enantio-differentiating ability as well as catalytic activity in the hydrogenation of β-diketones and β-keto esters.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Regio- and enantioselective rhodium-catalyzed addition of 1,3-diketones to allenes: Construction of asymmetric tertiary and quaternary all carbon centers》. Authors are Beck, Thorsten M.; Breit, Bernhard.The article about the compound:2,6-Dimethyl-3,5-heptanedionecas:18362-64-6,SMILESS:CC(C)C(CC(C(C)C)=O)=O).Electric Literature of C9H16O2. Through the article, more information about this compound (cas:18362-64-6) is conveyed.

An unprecedented highly regio- and enantioselective rhodium-catalyzed addition of 1,3-diketones to terminal and 1,1-disubstituted allenes furnishing asym. tertiary and quaternary all-carbon centers is reported. By applying a RhI/phosphoramidite/TFA catalytic system under mild conditions, the desired chiral branched α-allylated 1,3-diketones could be obtained in good to excellent yields, with perfect regioselectivity and in high enantioselectivity. The reaction shows a broad functional-group tolerance on both reaction partners highlighting its synthetic potential.

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Ignatchenko, Alexey V.; DiProspero, Thomas J.; Patel, Heni; LaPenna, Joseph R. published the article 《Equilibrium in the Catalytic Condensation of Carboxylic Acids with Methyl Ketones to 1,3-Diketones and the Origin of the Reketonization Effect》. Keywords: carboxylic acid methyl ketone catalytic condensation reketonization.They researched the compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6 ).Related Products of 18362-64-6. 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:18362-64-6) here.

Acetone is the expected ketone product of acetic acid decarboxylative ketonization reaction with metal oxide catalysts used in the industrial production of ketones and for biofuels upgrade. Decarboxylative cross-ketonization of a mixture of acetic and isobutyric acids yields highly valued unsym. Me iso-Pr ketone (MIPK) along with two less valuable sym. ketones, acetone and diisopropyl ketone (DIPK). We describe a side reaction of isobutyric acid with acetone yielding the cross-ketone MIPK with monoclinic zirconia and anatase titania catalysts in the absence of acetic acid. We call it re-ketonization reaction because acetone is deconstructed and used for the construction of MIPK. Isotopic labeling of the isobutyric acid’s carboxyl group shows that it is the exclusive supplier of the carbonyl group of MIPK, while acetone provides only Me group for MIPK construction. More branched ketones, MIPK or DIPK, are less reactive in their re-ketonization with carboxylic acids. The proposed mechanism of re-ketonization supported by DFT computations starts with acetone enolization and proceeds via its condensation with surface isobutyrate to a beta-diketone similar to beta-keto acids formation in the decarboxylative ketonization of acids. Decomposition of unsym. beta-diketones with water (or methanol) by the retro-condensation reaction under the same conditions over metal oxides yields two pairs of ketones and acids (or esters in case of methanol) and proceeds much faster compared to their formation. The major direction yields thermodynamically more stable products – more substituted ketones. DFT calculations predict even a larger fraction of the thermodynamically preferred pair of products. The difference is explained by some degree of a kinetic control in the opposite direction. Re-ketonization has lower reaction rates compared to regular ketonization. Still, a high extent of re-ketonization occurs unnoticeably during the decarboxylative ketonization of acetic acid as the result of acetone reaction with acetic acid. This degenerate reaction is the major cause of the inhibition by acetone of its own rate of formation from acetic acid at high conversions.

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Thiazole | C3H3NS – PubChem,
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HPLC of Formula: 18362-64-6. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about Enthalpies of combustion of four methyl-substituted heptane-3,5-diones and benzoylacetone. Author is Ferrao, Maria Luisa C. C. H.; Ribeiro da Silva, M. A. V.; Suradi, S.; Pilcher, G.; Skinner, H. A..

The standard enthalpies of combustion of 2,2- and 2,6-dimethyl-, 2,2,6-trimethyl-, and 2,2,6,6-tetramethyl-3,5-heptanediones and PhCOCH2COMe (I) in O at 298.15 K were measured in a static bomb calorimeter. The standard enthalpies of formation of these ketones were calculated for the keto-enol equilibrium mixtures in the condensed state and for the liquid and gaseous enol forms from the above results. An estimate of the enthalpy of formation of I suggests that it exists predominantly in the enol form in the gaseous state.

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Thiazole | C3H3NS – PubChem,
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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about Design of removal agents for prevention of lithium intoxications. Chelating tendencies of model β-diketones, the main research direction is mental disorder lithium poisoning; diketone alkali metal complex; lithium diketone complex stability.Product Details of 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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Ishihara, Tatsumi; Takagi, Toshiaki; Ito, Masami; Nishiguchi, Hiroyasu; Takita, Yusaku published the article 《CO2 sensing property of CuO-BaTiO3 mixed oxide film prepared by self-assembled multibilayer film as a precursor》. Keywords: carbon dioxide sensor cupric oxide barium titanate film; self assembled multibilayer precursor cupric oxide barium titanate film.They researched the compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6 ).Synthetic Route of C9H16O2. 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:18362-64-6) here.

Preparation of CuO-BaTiO3 mixed oxide thin film by the decomposition of a self-assembled multibilayer film as a mol. template was studied. Also, CO2 sensing property of the resultant thin film was studied as a capacitive type sensor. The self-assembled bilayer film of few 1000 layers thickness can be obtained easily by casting an aqueous suspension consisting of dimethyldihexadecylammonium bromide (DC1-16), Cu(ClO4)2, Ba(TiO(C2O4)2), 2,6-dimethyl-3,5-heptadione (DHP), and polyvinyl alc. Divalent copper ion (Cu2+) which is associated with 2 DHP mols. was incorporated into the mol. bilayer film and BaTiO3 precursor exists at the interspace of mol. bilayer film by coordinating with polyvinyl alc. Upquenching the organic-inorganic film at 1173 K leads to the uniform film of CuO-BaTiO3 oxide mixture Although operating temperature shifted to higher temperature, the resultant film exhibits the capacitance change upon exposure to CO2. Consequently, the mixed oxide film of CuO-BaTiO3 prepared by the decomposition of multibilayer film was also an appropriate capacitive type CO2 sensor.

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Thiazole | C3H3NS – PubChem,
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Reference of 2,6-Dimethyl-3,5-heptanedione. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about FeCl3-catalyzed selective acylation of amines with 1,3-diketones via C-C bond cleavage. Author is Wang, Sinan; Yu, Yang; Chen, Xuyun; Zhu, Haipan; Du, Peile; Liu, Guohua; Lou, Liguang; Li, Hao; Wang, Wei.

We describe a novel FeCl3 catalyzed selective acylation of amines involving the C-C bond cleavage of simple 1,3-diketones. The process proceeds efficiently under a neat condition to give structurally diverse amides. Notably, the acylation process displays high selectivity toward amines over hydroxyl functionality. Traditionally difficult aromatic amines and sterically demanding disubstituted amines can engage in the process with high efficiency.

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

COA of Formula: C9H16O2. 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: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about Solvent effects on the oxidative free radical reactions of 2-amino-1,4-naphthoquinones. Author is Tseng, Chao-Ming; Wu, Yi-Lung; Chuang, Che-Ping.

Solvent effects on the manganese(III) initiated oxidative free radical reactions of 2-amino-1,4-naphthoquinones are described. This free radical reaction provides a novel method for the synthesis of benzo[f]indole-4,9-diones, benzo[f]indole-2,4,9-triones, benzo[b]carbazole-6,11-diones and benzo[b]acridine-6,11-diones. High chemoselectivity was observed in different solvents.

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