Chiral oxygen ligands

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 Steric and Electronic Effects in Methyl-Substituted 2,2′-Bipyrroles and Poly(2,2′-Bipyrrole)s: Part I. Synthesis and Characterization of Monomers and Polymers, published in 2000-05-31, which mentions a compound: 616-43-3, mainly applied to electrochem polymerization bipyrrole; methyl substituent polypyrrole elec property, Related Products of 616-43-3.

The effects of N- and C-Me substitution on the elec. and spectral properties of pyrrole, 2,2′-bipyrrole, and the corresponding polymers were investigated. A whole series of monomethyl and N- or Cβ-dimethyl-substituted 2,2′-bipyrroles was synthesized, and the electrochem. and spectral properties of all the compounds were investigated under identical testing conditions. The corresponding polymers were prepared by electrochem. anodic oxidation under comparable exptl. conditions and their spectroscopic and conductivity properties evaluated for comparison. The higher degree of efficiency in transmission of electronic effects associated with Me substitution at Cβ with respect to substitution at N was clearly demonstrated. The influence of the symmetry of the starting monomer (C2v or Cs) on the elec. properties of the resulting polymers is discussed.

If you want to learn more about this compound(3-Methyl-1H-pyrrole)Related Products of 616-43-3, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(616-43-3).

Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

Safety of 5,6-Dichloropyrazine-2,3-dicarbonitrile. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about Synthesis of mono-, di-, tri- and tetracarboxy azaphthalocyanines as potential dark quenchers. Author is Kopecky, Kamil; Satinsky, Dalibor; Novakova, Veronika; Miletin, Miroslav; Svoboda, Antonin; Zimcik, Petr.

Mono-, di-, tri- and tetracarboxy-substituted metal-free azaphthalocyanines (AzaPc) were synthesized from 5,6-bis(diethylamino)pyrazine-2,3-dicarbonitrile and 6-(5,6-dicyano-3-(diethylamino)pyrazin-2-ylamino)hexanoic acid using a statistical condensation approach. AzaPc bearing eight diethylamino peripheral substituents was also isolated from the mixture Anal. of the distribution of congeners in the statistical mixture using optimized HPLC method (Phenomenex Synergy RP Fusion column, acetonitrile/tetrahydrofuran/water (pH 5.5) 50:20:30) was performed. The anal. showed optimal ratios of starting materials to be 3:1 for AAAB, 1:3 for ABBB and 1:1 for AABB/ABAB types of the congeners. The distribution of the congeners corresponded well with calculated values indicating similar reactivity of both starting materials and no steric constraint between adjacent isoindole units in the AzaPc ring. All studied AzaPc showed no fluorescence, extremely low singlet oxygen quantum yields (Φ Δ < 0.005) in monomeric form and strong absorption in a wide range from 300 nm to almost 700 nm. Such properties are highly promising for future study of these compounds as dark quenchers of fluorescence in DNA hybridization probes. If you want to learn more about this compound(5,6-Dichloropyrazine-2,3-dicarbonitrile)Safety of 5,6-Dichloropyrazine-2,3-dicarbonitrile, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(56413-95-7).

Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

HPLC of Formula: 3685-23-2. 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: cis-4-Aminocyclohexane carboxylic acid, is researched, Molecular C7H13NO2, CAS is 3685-23-2, about Competing fragmentation processes of β-substituted propanoate ions upon collision induced dissociation. Author is Le Blanc, Luc M.; Powers, Sean W.; Grossert, J. Stuart; White, Robert L..

Rationale : When subjected to collisional activation, gas-phase carboxylate ions typically undergo decarboxylation. However, alternative fragmentation processes dominate when the carboxylate group is located within certain structural motifs. In this work, the fragmentation processes of β-substituted carboxylate ions are characterized to improve correlations between reactivity and structure. Methods : Mass spectra were collected using both ion trap and triple quadrupole mass spectrometers operating in the neg. ion mode; collision induced dissociation (CID) of ions was used to study the relationship between product ions and the structures of their precursor ions. Quantum mech. computations were performed on a full range of reaction geometries at the MP2/6-311++G(2d,p)//B3LYP/6-31++G(2d,p) level of theory. Results : For a series of β-substituted carboxylate ions, a product ion corresponding to the anion of the β-substituent was obtained upon CID. Detailed computations indicated that decarboxylative elimination and at least one other fragmentation mechanism had feasible energetics for the formation of substituent anions differing in their gas-phase basicities. Predicted energetics for anti- and synperiplanar alignments in the transition structures for decarboxylative elimination correlated with the positions of crossover points in breakdown curves acquired for conformationally constrained ions. Conclusions : The feasibility of more than one mechanism was established for the fragmentation of β-substituted propanoates. The contribution of each mechanistic pathway to the formation of the substituent anion was influenced by structural variations and conformational constraints, but mostly depended on the nature of the substituent.

If you want to learn more about this compound(cis-4-Aminocyclohexane carboxylic acid)HPLC of Formula: 3685-23-2, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(3685-23-2).

Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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 Hydrogenation of pyridine and α-picoline over Raney nickel-aluminum catalyst, published in 1959, which mentions a compound: 616-43-3, Name is 3-Methyl-1H-pyrrole, Molecular C5H7N, Quality Control of 3-Methyl-1H-pyrrole.

Hydrogenation of pyridine at 200° in a flow system over Raney Ni-Al catalyst gave piperidine, its azeotropic mixture with H2O (b739 90-2°, n20D 1.4320, d20 0.9277), and 2-methylpyridine. At low feed rate there was also formed some 3-methylpyrrole, 10% 2-propylpiperidine, and possibly some N-cyclopentylpiperidine. Hydrogenation of 2-picoline gave 2-pipecoline and some 3-methylpyrrole.

If you want to learn more about this compound(3-Methyl-1H-pyrrole)Quality Control of 3-Methyl-1H-pyrrole, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(616-43-3).

Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

Marey, Therese; Arriau, Jean published an article about the compound: 3-Methyl-1H-pyrrole( cas:616-43-3,SMILESS:CC1=CNC=C1 ).Application In Synthesis of 3-Methyl-1H-pyrrole. 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:616-43-3) through the article.

The energies of formation of 2-substituted pyrroles and 3-substituted pyrroles are almost the same; and the wavelengths of the π → π* electronic transition increase in the following order: H < Me < CN < CO2H < CH:NOH < CHO < NO2. Exptl. studies confirm the theoretical relation between wavelength and substituent. The larger bathochromic shifts are observed for the 2-substituted compounds If you want to learn more about this compound(3-Methyl-1H-pyrrole)Application In Synthesis of 3-Methyl-1H-pyrrole, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(616-43-3).

Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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: 56413-95-7, is researched, SMILESS is N#CC1=NC(Cl)=C(Cl)N=C1C#N, Molecular C6Cl2N4Journal, European Journal of Inorganic Chemistry called A novel nickel(II) complex adopting a cis-configuration: solvothermal synthesis and crystal structure of [NiL2(H2O)4] (L = 1,4-dihydropyrazine-2,3-dione-5,6-dicarboxylate), Author is Liu, Cai-Ming; Zhang, De-Qing; Qin, An-Jun; Ye, Chen; Hu, Huai-Ming; Zhu, Dao-Ben, the main research direction is nickel pyrazinedionedicarboxylate complex preparation structure; crystal structure nickel pyrazinedionedicarboxylate complex; pyrazinedicarbodinitrile reaction cadmium nickel perchlorate hydrate.Application In Synthesis of 5,6-Dichloropyrazine-2,3-dicarbonitrile.

Under solvothermal reaction conditions, the reaction of 5,6-dichloropyrazine-2,3-dicarbonitrile and [Ni(ClO4)2]·6H2O produces a novel cis-Ni(II) complex [NiL2(H2O)4] (1) (L = 1,4-dihydropyrazine-2,3-dione-5,6-dicarboxylate), whereas only hydrated 1,4-dihydropyrazine-2,3-dione-5,6-dicarboxylic acid (2) was obtained as a single phase when [Cd(ClO4)2]·6H2O was used instead of [Ni(ClO4)2]·6H2O. The crystal structure of 1 was determined

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 3-Methyl-1H-pyrrole(SMILESS: CC1=CNC=C1,cas:616-43-3) is researched.HPLC of Formula: 1569-17-1. The article 《Controlling the electro-mechanical performance of polypyrrole through 3- and 3,4-methyl substituted copolymers》 in relation to this compound, is published in RSC Advances. Let’s take a look at the latest research on this compound (cas:616-43-3).

Conducting polymers such as polypyrrole are biocompatible materials used in bioelectronic applications and microactuators for mechanobiol. and soft microrobotics. The materials are commonly electrochem. synthesized from an electrolyte solution comprising pyrrole monomers and a salt, which is incorporated as the counter ion. This electrosynthesis results in polypyrrole forming a three-dimensional network with extensive crosslinking in both the alpha and beta positions, which impacts the electro-mech. performance. In this study we adopt a ‘blocking strategy’ to restrict and control crosslinking and chain branching through beta substitution of the monomer to investigate the effect of crosslinking on the electroactive properties. Me groups where used as blocking groups to minimise the impact on the pyrrole ring system. Pyrrole, 3- and 3,4-Me substituted pyrrole monomers were electro-polymerised both as homo-polymers and as a series of co-polymer films. The electroactive performance of the films was characterised by measuring their electrochem. responses and their reversible and non-reversible film thickness changes. This showed that altering the degree of crosslinking through this blocking strategy had a large impact on the reversible and irreversible volume change. These results elaborate the importance of the polymer structure in the actuator performance, an aspect that has hitherto received little attention.

If you want to learn more about this compound(3-Methyl-1H-pyrrole)Product Details of 616-43-3, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(616-43-3).

Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile(SMILESS: N#CC1=NC(Cl)=C(Cl)N=C1C#N,cas:56413-95-7) is researched.Product Details of 40400-13-3. The article 《Synthesis, structure and properties of the novel conducting dithiolato-metal complexes having dicyanopyrazine moieties》 in relation to this compound, is published in Synthetic Metals. Let’s take a look at the latest research on this compound (cas:56413-95-7).

Novel dithiolato-metal complexes from 2,3-dicyano-5,6-dimercaptopyrazine (H2dcdmp) ligands were synthesized, and their TTF salts, (TTF)5[M(dcdmp)2]2 (M = Ni or Pd), were obtained by the diffusion method in MeCN. The elec. conductivities of these complexes at room temperature are 10-2-10-3 S cm-1. The x-ray structural anal. of (TTF)5[Pd(dcdmp)2]2 indicates that 2 Pd(dcdmp)2 mols. and 1 TTF mol. form 2:1 mixed stacks along the c axis, and other TTF mols. stack along the b axis. A number of intermol. S···N and S···S heteroatom contacts within the sum of van der Waals radii are observed in the crystal.

If you want to learn more about this compound(5,6-Dichloropyrazine-2,3-dicarbonitrile)Reference of 5,6-Dichloropyrazine-2,3-dicarbonitrile, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(56413-95-7).

Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 3-Methyl-1H-pyrrole(SMILESS: CC1=CNC=C1,cas:616-43-3) is researched.Product Details of 60827-45-4. The article 《The transferability of the dynamic correlation energy in conjugated molecules》 in relation to this compound, is published in Chemical Physics Letters. Let’s take a look at the latest research on this compound (cas:616-43-3).

The dynamic correlation energy of the ground state of organic conjugated mols., calculated using the Colle-Salvetti functional, has been decomposed into fragment contributions obtained by integrating the functional inside sep. fragment volumes defined as proposed by Bader. It is shown that these contributions, properly renormalized, can be utilized for predicting in a satisfactory way the total correlation energy of oligomers obtained by condensation of pyrrole and methane mols.

If you want to learn more about this compound(3-Methyl-1H-pyrrole)Product Details of 616-43-3, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(616-43-3).

Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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: 616-43-3, is researched, SMILESS is CC1=CNC=C1, Molecular C5H7NJournal, Organometallics called Regioselective Electrophilic Substitution and Addition Reactions at an N-Coordinated Pyrrolyl Ligand in (PMe2Ph)3Cl2Re(NC4H4), Author is DuBois, M. Rakowski; Vasquez, Lisa D.; Peslherbe, L.; Noll, B. C., the main research direction is crystal structure rhenium pyrrole bromopyrrole phosphine; rhenium pyrrolate phosphine preparation halo methyl addition; regioselective electrophilic addition halo methyl rhodium coordinated pyrrole.SDS of cas: 616-43-3.

The reaction of excess pyrrolyllithium with mer-(PMe2Ph)3ReCl3 gives the air-stable product mer-(PMe2Ph)3Cl2Re(NC4H4) (1), which was characterized by spectroscopic techniques and by an x-ray diffraction study. 1 Reacts with electrophiles to form new Re(III) complexes with regioselectively substituted pyrrolyl ligands. For example, reaction with 1 equiv of N-chlorosuccinimide forms the complex with a 3-chloropyrrolyl ligand, while reaction with excess reagent produces the 3,4-dichloropyrrolyl and 2,3,4-trichloropyrrolyl complexes. The regiochem. of the reactions was established from 1H NMR data, and the structure of the dibrominated (PMe2Ph)3Cl2Re(3,4-NC4H2Br2) (5) was confirmed by x-ray diffraction. Reaction of 1 with Me triflate produces after workup (PMe2Ph)3Cl2Re(3-NC4H3Me) (6), and further reaction of 6 with Me triflate yields (PMe2Ph)3Cl2Re(3,4-NC4H2(Me)2) (7). In contrast, triflic acid protonates the pyrrolyl ligand of 1 at the α-C to form [(PMe2Ph)3Cl2Re(NC4H5)]OTf (8), which was identified by an x-ray diffraction study. The Michael addition of di-Me acetylenedicarboxylate to the β-C of the pyrrolyl ligand in 1 also was characterized. Methods for the removal of the substituted pyrrolyl ligands from the Re center are described.

If you want to learn more about this compound(3-Methyl-1H-pyrrole)SDS of cas: 616-43-3, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(616-43-3).

Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate