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 《Theory of chain-end activated degradation of heterodisperse polymers》. Authors are Gordon, Manfred.The article about the compound:2-Methylglutaronitrilecas:4553-62-2,SMILESS:N#CC(C)CCC#N).Related Products of 4553-62-2. Through the article, more information about this compound (cas:4553-62-2) is conveyed.

The theory treated steady-state degradation. Previous data on the initial degradation rates of poly-(methyl methacrylate) as a function of DPn (mean chain length) were fitted to asymptotic solutions for high and low DPn, but diverged largely from the solution for intermediate regions. Because of the simplicity of the solution for exponentially distributed polymer, a small random scission component, superposed on chain-end activated zipping, was treated with ample accuracy to fit published data for DPn decay during degradation of polystyrene. The data were not sufficiently accurate to distinguish between random splitting, weak-link scission, or scission following chain transfer to polymer. The rate curves on low-mol.-weight polystyrene at high temperature by Madorsky (C.A. 46, 10813h) were fitted to the improved theory, assuming termination by disproportionation. The data of Grassie and Kerr (C.A. 46, 7857f; 51, 12611d) for high-mol.-weight polystyrene at low temperature was fitted, assuming 1st-order radical termination.

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Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 75732-01-3, is researched, Molecular C9H11Cu, about Organoborane Acceptor-Substituted Polythiophene via Side-Group Borylation, the main research direction is polythiophene organoborane acceptor modification.Category: iodides-buliding-blocks.

Organoborane acceptor-modified polythiophene was prepared from silylated polythiophene via a new polymer modification strategy. The attachment of electron-deficient dimesitylboryl groups leads to a significant decrease of the LUMO levels as evidenced by a strong bathochromic shift in the UV-visible absorption and emission spectra and the observation of reversible reduction waves in the cyclic voltammogram at significantly less cathodic potentials than for the silylated precursor polymer. The modification of conjugated polymers with electron-deficient boryl groups provides a new design principle for the preparation of electronically interesting materials.

In some applications, this compound(75732-01-3)Category: iodides-buliding-blocks is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Application In Synthesis of (2S)-(+)-3-Chloropropane-1,2-diol. 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. Compound: (2S)-(+)-3-Chloropropane-1,2-diol, is researched, Molecular C3H7ClO2, CAS is 60827-45-4, about Inhibition of fructolysis in boar spermatozoa by the male antifertility agent (S)-α-chlorohydrin.

The male antifertility agent (S)-α-chlorohydrin  [60827-45-4] strongly inhibited the oxidative metabolism of fructose  [57-48-7] by boar spermatozoa in vitro. The result of this action, which has been deduced to be an inhibition of glyceraldehyde phosphate dehydrogenase, caused an accumulation of fructose 1,6-bisphosphate  [488-69-7] and the triose phosphates, and a decrease in substrate-level phosphorylation with a concomitant lowering of the energy charge potential of the spermatozoa. (R)-α-chlorohydrin  [57090-45-6] Had no inhibitory activity on fructolysis. A study of the comparative metabolism of (R)-[3-36Cl]-α-chlorohydrin and (R,S)-[3-36Cl]-α-chlorohydrin by boar spermatozoa showed that it is the (S)-isomer that specifically undergoes a process of oxidative metabolism to (R)-3-chlorolactaldehyde  [84607-54-5]. This endogenous oxidation product, which has the same absolute configuration as the substrate for glyceraldehyde phosphate dehydrogenase, may be the active metabolite of (S)-α-chlorohydrin that inhibits this enzyme. Exogenous (R,S)-3-chlorolactaldehyde  [84709-24-0] inhibited the oxidative metabolism of fructose by boar spermatozoa, apparently by a mechanism similar to that of (S)-α-chlorohydrin.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 75732-01-3, is researched, Molecular C9H11Cu, about Structural characterization of magnesium organocuprates derived from Grignard reagents: CuI-based inverse crown ethers, the main research direction is magnesium organocuprate copper based inverse crown ether preparation structure; crystal structure magnesium organocuprate phenyl mesityl preparation; mol structure.Safety of Mesitylcopper(I).

The title compounds were prepared in 31-56% yields by reaction of Cu(I)Mes (Mes = 2,4,6-trimethylphenyl) with PhMgI or MesMgBr in PhMe-Et2O or PhMe-THF solvent mixtures and their structures were determined by x-ray crystallog. The structures of the title compounds are directly comparable to those of Li organocuprates, with the formal replacement of the Li cation with a Mg halide cation. Both types of organocuprates form contact ion pairs in weakly coordinating solvents and solvent-separated ion pairs in strongly coordinating solvents.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Computed Properties of C9H11Cu. 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: Mesitylcopper(I), is researched, Molecular C9H11Cu, CAS is 75732-01-3, about First incorporation of the tetrahedral [Sn4]4- cluster into a discrete solvate Na4[Sn4]·(NH3)13 from solutions of Na4Sn4 in liquid ammonia. Author is Waibel, Markus; Faessler, Thomas F..

Treatment of solutions of Na4Sn4 in liquid NH3 with CuMes (Mes = mesityl) and 18-crown-6 afforded crystals Na4[Sn4]·(NH3)13. The structure features anionic units {Na7[Sn4]2} and sep. Na cations, both fully solvated by NH3 mols.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 75732-01-3, is researched, Molecular C9H11Cu, about Impact of Surface Chemistry on Copper Deposition in Mesoporous Silicon, the main research direction is surface chem copper deposition mesoporous silicon.COA of Formula: C9H11Cu.

An easy, efficient, and safe process is developed to metalize mesoporous Si (PSi) with Cu from the decomposition of a solution of mesitylcopper (CuMes) in an imidazolium-based ionic liquid (IL), [C1C4Im][NTf2]. The impregnation of a solution of CuMes in IL affords the deposition of metallic islands not only on the surface but also deep within the pores of a mesoporous Si layer with small pores <10 nm. Therefore, this process is well suited to efficiently and completely metalize PSi layers. An in-depth mechanistic study shows that metal deposition is due to the reduction of CuMes by surface silane groups rather than by Si oxidation as observed in aqueous or H2O-containing media. This could open a new route to the chem. metalization of PSi by less-noble metals difficult to attain by a conventional displacement reaction. In some applications, this compound(75732-01-3)COA of Formula: C9H11Cu is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Synthetic Route of C3H7ClO2. 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: (2S)-(+)-3-Chloropropane-1,2-diol, is researched, Molecular C3H7ClO2, CAS is 60827-45-4, about Enhancing the detection sensitivity of trace analysis of pharmaceutical genotoxic impurities by chemical derivatization and coordination ion spray-mass spectrometry. Author is Bai, Lin; Sun, Mingjiang; An, Jianguo; Liu, David Q.; Chen, Ted K.; Kord, Alireza S..

Many pharmaceutical genotoxic impurities are neutral mols. Trace level anal. of these neutral analytes is hampered by their poor ionization efficiency in mass spectrometry (MS). Two anal. approaches including chem. derivatization and coordination ion spray-MS were developed to enhance neutral analyte detection sensitivity. The chem. derivatization approach converts analytes into highly ionizable or permanently charged derivatives, which become readily detectable by MS. The coordination ion spray-MS method, on the other hand, improves ionization by forming neutral-ion adducts with metal ions such as Na+, K+, or NH4 + which are introduced into the electrospray ionization source. Both approaches have been proven to be able to enhance the detection sensitivity of neutral pharmaceuticals dramatically. This article demonstrates the successful applications of the two approaches in the anal. of four pharmaceutical genotoxic impurities identified in a single drug development program, of which two are non-volatile alkyl chlorides and the other two are epoxides.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Safety of (2S)-(+)-3-Chloropropane-1,2-diol. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: (2S)-(+)-3-Chloropropane-1,2-diol, is researched, Molecular C3H7ClO2, CAS is 60827-45-4, about Catalytic behavior of wool-osmium tetroxide complex for asymmetric dihydroxylation of olefins. Author is Miao, Ju-Hong; Yang, Ji-Huo; Chen, Li-Yi; Tu, Bu-Xin; Huang, Mei-Yu; Jiang, Ying-Yan.

A new chiral polymer-metal complex, wool-osmium tetroxide (wool-OsO4) complex was prepared by a very simple method. This complex was able to catalyze the asym. dihydroxylation of allylamine to (R)-(+)-3-amino-1,2-propanediol and allyl chloride to (S)-(+)-3-chloro-1,2-propanediol. The optical yields amounted to 83.7 and 57.2%, and the product yields were 80.2 and 68.5% resp. The exptl. results showed that OsO4 content in the complex, reaction time, allylamine/OsO4 molar ratio and solvent all have an effect on the product and optical yields. Addnl., wool-OsO4 complex catalyst could be reused without any remarkable change in optical catalytic activity.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

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, Article, Dalton Transactions called Lithium heterocuprates: the influence of the amido group on organoamidocuprate structures, Author is Bomparola, Roberta; Davies, Robert P.; Hornaeur, Stefan; White, Andrew J. P., which mentions a compound: 75732-01-3, SMILESS is [Cu]C1=C(C)C=C(C)C=C1C, Molecular C9H11Cu, Synthetic Route of C9H11Cu.

Li organoamidocuprates LiCuR(NR’2) are an important class of organocopper reagents and found widespread application in conjugate addition and other bond-forming reactions. The dependence of the structures and equilibrium of these species on the steric and electronic properties of the amido group is reported in both the solid state and in solution Three different cuprate complexes were crystallog. characterized: the organoamidocuprate [Cu2Li2Mes2TMP2] (2) (TMP = 2,2,6,6-tetramethylpiperidide) which is shown to adopt a head-to-tail conformation; [Cu2Li2(N(CH2Ph)CH2CH2NMe2)4] (3) which is a homoamidocuprate and contains addnl. coordination of the Li centers from intra-mol. tertiary amine groups; and the diastereomeric organoamidocuprate [Cu2Li2Mes2(N(R-CH(Ph)Me)(CH2CF3))2] (4) which adopts a head-to-head conformation. Complex 4 is unique in being the 1st crystallog. characterized example of a head-to-head isomer of a heterocuprate, and its structure also has implications for the use of scalemic amidocuprates in asym. induced conjugate addition The solution equilibrium of all new complexes also were studied using 7Li NMR spectroscopy, and in each case the species observed in the crystal structure was shown to also be the predominant isomer in solution

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Quality Control of 2-Methylglutaronitrile. 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-Methylglutaronitrile, is researched, Molecular C6H8N2, CAS is 4553-62-2, about Interactions in SMA-SAN blends. Author is Kim, J. H.; Barlow, J. W.; Paul, D. R..

Styrene-maleic anhydride copolymers form miscible blends with styrene-acrylonitrile copolymers when the maleic anhydride (I) and acrylonitrile (II) contents do not differ too greatly. This is the result of a weak exothermic interaction between the I and II units, as indicated by measuring the heats of mixing for appropriate liquid analogs of the various monomer units. The region of copolymer compositions for blend miscibility is predicted from the Sanchez-Lacombe mixture theory using net interaction parameters calculated from analog calorimetry results via a simple binary interaction model for copolymers. Lower critical solution temperature behavior was observed for blends of copolymers having compositions near the edge of the miscibility region. Various glass transition, volumetric, and FTIR results are discussed in terms of the interactions observed

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com