Tag: M.W:100-200

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Mercury(II) complexes of β-diketones》. Authors are Nonhebel, D. C..The article about the compound:2,6-Dimethyl-3,5-heptanedionecas:18362-64-6,SMILESS:CC(C)C(CC(C(C)C)=O)=O).COA of Formula: C9H16O2. Through the article, more information about this compound (cas:18362-64-6) is conveyed.

Hg derivatives of diisobutyrylmethane and dipivaloylmethane are enolates, not cyclic derivatives like other metal β-diketones, as shown by infrared and reactions with BzCl and p-nitrobenzoyl chloride to give O-acylated β-diketones.

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

COA of Formula: 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 Structure and NIR-luminescence of ytterbium(III) beta-diketonate complexes with 5-nitro-1,10-phenanthroline ancillary ligand: assessment of chain length and fluorination impact. Author is Martin-Ramos, Pablo; Pereira da Silva, Pedro S.; Lavin, Victor; Martin, Inocencio R.; Lahoz, Fernando; Chamorro-Posada, Pedro; Ramos Silva, Manuela; Martin-Gil, Jesus.

Seven new tris(β-diketonate)ytterbium(III) complexes with the general formula [Yb(β-diketonate)3(5NO2phen)] [the β-diketone is 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione (1), 4,4,4-trifluoro-1-(2-furyl)-1,3-butanedione (2), 1,1,1-trifluoro-2,4-pentanedione (3), 1,1,1-trifluoro-5,5-dimethyl-2,4-hexanedione (4), 1,1,1,5,5,6,6,7,7,7-decafluoro-2,4-heptanedione (5), 2,4-hexanedione (6) or 2,6-dimethyl-3,5-heptanedione (7), and 5NO2phen = 5-nitro-1,10-phenanthroline] were synthesized and characterized by elemental anal., attenuated total reflectance-FTIR and photoluminescence spectroscopy. Single crystal x-ray structures have been determined for three fluorinated complexes (3-5) and ground state geometries of the other four complexes have been predicted using the Sparkle/PM6 model (1-2, 6-7). These exptl. and semi-empirical structures reveal octacoordination around the Yb3+ ion. Photoluminescence studies and lifetime measurements show that the increase in the fluorinated β-diketonate chain length is associated with a decrease in Yb3+ luminescence intensity of the 2F5/2 → 2F7/2 transition at ∼980 nm and the 2F5/2 excited state lifetime, while the ligand lifetime value remains almost unaffected. Finally, fluorination of the ligands is only advised when the complexes are to be used for co-doping with isostructural Er3+ complexes for optical amplifiers, since it leads to a slight decrease in luminescence intensity for the same β-diketonate chain length.

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

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Polyhedron called Extraction of nickel in the presence of ammonia with β-diketones containing phenyl and alkyl groups, Author is Koshimura, Hideo; Okubo, Teiji, which mentions a compound: 18362-64-6, SMILESS is CC(C)C(CC(C(C)C)=O)=O, Molecular C9H16O2, Recommanded Product: 18362-64-6.

The extraction of Ni chelates with β-diketones containing either alkyl or Ph groups was examined in the absence and in the presence of NH3 in the aqueous solution, in order to define the effect of substituents and the coordinating effect of NH3 on the extraction In the extraction of Ni chelates in the presence of NH3 the extracted species NH3 are [NiA2(NH3)2] (A: β-diketone anion) and NH3 acts both as adduct-forming in the organic phase and as masking reagent in the aqueous phase.

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

Fackler, John P. Jr.; Mittleman, Martin L.; Weigold, Helmut; Barrow, Gordon M. published an article about the compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6,SMILESS:CC(C)C(CC(C(C)C)=O)=O ).Quality Control of 2,6-Dimethyl-3,5-heptanedione. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:18362-64-6) through the article.

The uv electronic spectra of several Ni(II) β-ketoenolates in CHCl3 and hydrocarbon solvents are described and are shown to be consistent with the assignment of Cotton and Wise for the about 233- and 268-mμ bands. The vapor uv spectrum of Ni(II) acetylacetonate also shows these bands, as expected for a planar species. The ir spectra of CO2 matrix-isolated acetylacetonates of Cu(II), Ni(II), Co(II), and Zn(II) are reported between 650 and 2200 cm.-1 These spectra suggest the existence of similar (planar) structures for the Ni(II) and Cu(II) monomeric species and similar (tetrahedral) structures for the Zn(II) and Co(II) complexes. Since previous ir studies of metal acetylacetonates have ignored the fact that the anhydrous complexes are polymeric, it is fortunate that only minor differences exist between the spectra of the matrix-isolated Cu(II) complex, the complex which has received the greatest study, and the crystalline material.

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

Recommanded Product: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine, is researched, Molecular C10H24N2, CAS is 111-18-2, about Partially fluorinated, multication cross-linked poly(arylene piperidinium) membranes with improved conductivity and reduced swelling for fuel cell application. Author is Jia, Yabin; Ma, Lingling; Yu, Qingyu; Qaisrani, Naeem Akhtar; Li, Lv; Zhou, Ruiting; He, Gaohong; Zhang, Fengxiang.

As an important component in alk. membrane fuel cells, anion exchange membrane (AEM) often suffers from the tradeoff between ionic conductivity and chem./dimensional stability. We herein report a partially fluorinated poly(arylene piperidinium) AEM with multication cross-links, which was synthesized by copolymerizing 1,1,1-trifluoroacetone, N-methyl-4-piperidone, biphenyl, and subsequent crosslinking with N1, N6-bis(6-bromohexyl)-N1, N1, N6, N6-tetramethylhexane-1,6-diammonium bromide. The resultant AEM exhibited an excellent OH- conductivity of 148.7 mS cm-1 at 80 °C (IEC = 2.9 mmol g-1) due to the multication structure, which may promote microphase separation to produce wide ion-conducting channels. Compared with those without partial fluorination, the fluorinated AEM showed lower swelling ratio (33% vs. 58% at 80 °C). The ionic conductivity of the AEM remained by 85% after it was treated 1700 h in 1 M NaOH at 80 °C. In addition, the H2/O2 fuel cell assembled with the AEM yielded a peak power d. of 208 mW cm-2 at 60 °C. Our work successfully demonstrates the synergistic effect of partially fluorinated backbone and multication cross-linked structure to inhibit membrane swelling while keeping high conductivity; it is beneficial for better balancing AEM conductivity and robustness. Partially fluorinated poly(arylene piperidinium) AEM with multication cross-links. The fabricated membrane showed higher conductivity and much lower swelling compared with its non-fluorinated counterpart. [graphic not available: see fulltext]

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

Quality Control of 2,6-Dimethyl-3,5-heptanedione. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about H2O2-mediated oxidative formation of amides from aromatic amines and 1,3-diketones as acylation agents via C-C bond cleavage at room temperature in water under metal-free conditions. Author is Sun, Xi; Wang, Min; Li, Pinhua; Zhang, Xiuli; Wang, Lei.

1,3-Diketones, as novel acylation agents, reacted with aromatic amines promoted by com. available H2O2 (30% aqueous) as the sole oxidant at room temperature under metal-free conditions in water, leading to a novel and rapid amide bond formation strategy. The reported method is high-yielding, simple and mild, and is the first example of the use of 1,3-diketones as acylation agents via C-C bond cleavage.

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

COA of Formula: C9H16O2. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about Steric crowding effect of 1,3-diketonates on the structures and the solution behaviors of nickel(II) mixed-ligand complexes. Author is Arakawa-Itoh, Machiko; Shibata, Masayo; Linert, Wolfgang; Fukuda, Yutaka.

Seven nickel(II) mixed-ligand diketonate complexes, containing bulky substituents, [Ni(RCOCHCOR)(diamine)X] and [Ni(RCOCHCOR)(diamine)][Y] [R = Me, Et, iPr; amine = Me2NCH2CH2NMe2 (tmen), 1,1′-(1,2-ethanediyl)bis(piperidine) (dipe); X = NO3, Y = BPh4, BF4] were prepared The crystal structures were analyzed: nitrate complexes have a six-coordinated octahedral structure with a bidentate-coordinated NO3-, and each tetraphenylborate complex has a four-coordinated square-planar structure. The ligand field strength of [Ni(RCOCHCOR)(diamine)]BPh4 in the solid state increases in the order: [Ni(iPrCOCHCOiPr)(dipe)]BPh4 < [Ni(EtCOCHCOEt)(dipe)]BPh4 < [Ni(iPrCOCHCOiPr)(tmen)]BPh4 = [Ni(EtCOCHCOEt)(tmen)]BPh4. In solution, the change of the color depending on the donor/acceptor ability of the solvent, i.e., solvatochromism was observed When DMSO was added to a solution of [Ni(RCOCHCOR)(diamine)]BPh4 in inert 1,2-dichloroethane, the adduct formation constants are in the order: [Ni(iPrCOCHCOiPr)(dipe)]BPh4 < [Ni(EtCOCHCOEt)(dipe)]BPh4 << [Ni(iPrCOCHCOiPr)(tmen)]BPh4 = [Ni(EtCOCHCOEt)(tmen)]BPh4, reflecting the difference in steric hindrance of the ligands rather than the difference in ligand field strength. The steric crowding effect of 1,3-diketonates was observed in the solid state and solution when bulky dipe is used as diamine. As far as I know, this compound(18362-64-6)COA of Formula: C9H16O2 can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.

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

Synthetic Route of C5H7N3O. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 1-Aminopyrrole-2-carboxamide, is researched, Molecular C5H7N3O, CAS is 159326-69-9, about Pyrimidinone Nicotinamide Mimetics as Selective Tankyrase and Wnt Pathway Inhibitors Suitable for in Vivo Pharmacology. Author is Johannes, Jeffrey W.; Almeida, Lynsie; Barlaam, Bernard; Boriack-Sjodin, P. Ann; Casella, Robert; Croft, Rosemary A.; Dishington, Allan P.; Gingipalli, Lakshmaiah; Gu, Chungang; Hawkins, Janet L.; Holmes, Jane L.; Howard, Tina; Huang, Jian; Ioannidis, Stephanos; Kazmirski, Steven; Lamb, Michelle L.; McGuire, Thomas M.; Moore, Jane E.; Ogg, Derek; Patel, Anil; Pike, Kurt G.; Pontz, Timothy; Robb, Graeme R.; Su, Nancy; Wang, Haiyun; Wu, Xiaoyun; Zhang, Hai-Jun; Zhang, Yue; Zheng, Xiaolan; Wang, Tao.

The canonical Wnt pathway plays an important role in embryonic development, adult tissue homeostasis, and cancer. Germline mutations of several Wnt pathway components, such as Axin, APC, and ss-catenin, can lead to oncogenesis. Inhibition of the poly(ADP-ribose) polymerase (PARP) catalytic domain of the tankyrases (TNKS1 and TNKS2) is known to inhibit the Wnt pathway via increased stabilization of Axin. In order to explore the consequences of tankyrase and Wnt pathway inhibition in preclin. models of cancer and its impact on normal tissue, the authors sought a small mol. inhibitor of TNKS1/2 with suitable physicochem. properties and pharmacokinetics for hypothesis testing in vivo. Starting from a 2-Ph quinazolinone hit I, the authors discovered the pyrrolopyrimidinone compound II (AZ6102), which is a potent TNKS1/2 inhibitor that has 100-fold selectivity against other PARP family enzymes and shows 5 nM Wnt pathway inhibition in DLD-1 cells. Moreover, compound II can be formulated well in a clin. relevant i.v. solution at 20 mg/mL, has demonstrated good pharmacokinetics in preclin. species, and shows low Caco2 efflux to avoid possible tumor resistance mechanisms.

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

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 111-18-2, is researched, SMILESS is CN(C)CCCCCCN(C)C, Molecular C10H24N2Journal, Article, Nature Materials called One-dimensional intergrowths in two-dimensional zeolite nanosheets and their effect on ultra-selective transport, Author is Kumar, Prashant; Kim, Dae Woo; Rangnekar, Neel; Xu, Hao; Fetisov, Evgenii O.; Ghosh, Supriya; Zhang, Han; Xiao, Qiang; Shete, Meera; Siepmann, J. Ilja; Dumitrica, Traian; McCool, Benjamin; Tsapatsis, Michael; Mkhoyan, K. Andre, the main research direction is zeolite nanosheets mass transfer xylene gas separation membrane.Category: thiazole.

Zeolite MFI is a widely used catalyst and adsorbent that also holds promise as a thin-film membrane. The discovery of nanometer-thick two-dimensional (2D) MFI nanosheets has facilitated methods for thin-film zeolite fabrication that open new horizons for membrane science and engineering. However, the crystal structure of 2D-MFI nanosheets and their relationship to separation performance remain elusive. Using transmission electron microscopy, we find that one- to few-unit-cell-wide intergrowths of zeolite MEL exist within 2D-MFI. We identify the planar distribution of these 1D or near-1D-MEL domains, and show that a fraction of nanosheets have high (∼25% by volume) MEL content while the majority of nanosheets are MEL-free. Atomistic simulations show that commensurate knitting of 1D-MEL within 2D-MFI creates more rigid and highly selective pores compared to pristine MFI nanosheets, and permeation experiments show a separation factor of 60 using an industrially relevant (undiluted 1 bar xylene mixture) feed. Confined growth in graphite is shown to increase the MEL content in MFI nanosheets. Our observation of these intergrowths suggests strategies for the development of ultra-selective zeolite membranes.

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

Hall, John Robert; Swile, G. A. published the article 《1H NMR spectra of some β-dicarbonyl complexes of trimethylplatinum(IV)》. Keywords: PMR dicarbonyl complex platinum; dicarbonyl complex platinum PMR; platinum dicarbonyl complex; carbonyl platinum complex; trimethyl platinum complex; methyl platinum complex.They researched the compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6 ).Safety of 2,6-Dimethyl-3,5-heptanedione. 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.

Variable-temperature NMR spectra of a number of dimeric β-dicarbonyl complexes of trimethylplatinum(IV), where β-dicarbonyl = malondialdehyde, aceto acetaldehyde, acetylacetone, and diisobutyrylmethane, have been recorded in CDCl3. Results indicate that above room temperature, rapid dissociation of the bond between Pt and the γ-C atom of the β-dicarbonyl ligand occurs.

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