Category: 616-43-3

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 3-Methyl-1H-pyrrole( cas:616-43-3 ) is researched.SDS of cas: 616-43-3.Muradov, Nazim; Fidalgo, Beatriz; Gujar, Amit C.; T-Raissi, Ali published the article 《Pyrolysis of fast-growing aquatic biomass -Lemna minor (duckweed): Characterization of pyrolysis products》 about this compound( cas:616-43-3 ) in Bioresource Technology. Keywords: pyrolysis aquatic biomass Lemna duckweed oil char gas biofuel. Let’s learn more about this compound (cas:616-43-3).

The aim of this work was to conduct the exptl. study of pyrolysis of fast-growing aquatic biomass -Lemna minor (commonly known as duckweed) with the emphasis on the characterization of main products of pyrolysis. The yields of pyrolysis gas, pyrolytic oil (bio-oil) and char were determined as a function of pyrolysis temperature and the sweep gas (Ar) flow rate. Thermogravimetric/differential thermogravimetric (TG/DTG) analyses of duckweed samples in inert (helium gas) and oxidative (air) atm. revealed differences in the TG/DTG patterns obtained for duckweed and typical plant biomass. The bio-oil samples produced by duckweed pyrolysis at different reaction conditions were analyzed using GC-MS technique. It was found that pyrolysis temperature had minor effect on the bio-oil product slate, but exerted major influence on the relative quantities of the individual pyrolysis products obtained. While, the residence time of the pyrolysis vapors had negligible effect on the yield and composition of the duckweed pyrolysis products.

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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 preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 3-Methyl-1H-pyrrole( cas:616-43-3 ) is researched.HPLC of Formula: 616-43-3.Chen, Wei; Yang, Haiping; Chen, Yingquan; Xia, Mingwei; Chen, Xu; Chen, Hanping published the article 《Transformation of Nitrogen and Evolution of N-Containing Species during Algae Pyrolysis》 about this compound( cas:616-43-3 ) in Environmental Science & Technology. Keywords: nitrogen evolution nitrogen containing species algae pyrolysis biofuel; amino acid decomposition algae biomass pyrolysis. Let’s learn more about this compound (cas:616-43-3).

Transformation and evolution mechanisms of nitrogen during algae pyrolysis were investigated in depth with exploration of N-containing products under variant temperature Results indicated nitrogen in algae is mainly in the form of protein-N (∼90%) with some inorganic-N. At 400-600 °C, protein-N in algae cracked first with algae pyrolysis and formed pyridinic-N, pyrrolic-N, and quaternary-N in char. The content of protein-N decreased significantly, while that of pyrrolic-N and quaternary-N increased gradually with temperature increasing. Pyridinic-N and pyrrolic-N formation was due to deamination or dehydrogenation of amino acids; subsequently, some pyridinic-N converted to quaternary-N. Increasing temperature decreased amides content greatly while increased that of nitriles and N-heterocyclic compounds (pyridines, pyrroles, and indoles) in bio-oil. Amides were formed through NH3 reacting with fatty acids, that underwent dehydration to form nitriles. Besides, NH3 and HCN yields increased gradually. NH3 resulted from ammonia-N, labile amino acids and amides decomposition, while HCN came from nitrile decomposition At 700-800 °C, evolution trend of N-containing products was similar to that at 400-600 °C. While N-heterocyclic compounds in bio-oil mainly came from pyrifinic-N, pyrrolic-N, and quaternary-N decomposition Moreover, cracking of pyridinic-N and pyrrolic-N produced HCN and NH3. A mechanism of nitrogen transformation during algae pyrolysis is proposed based on amino acids decomposition

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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

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, 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., which mentions a compound: 616-43-3, SMILESS is CC1=CNC=C1, Molecular C5H7N, Category: chiral-oxygen-ligands.

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.

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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

COA of Formula: C5H7N. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 3-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about 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 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.

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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

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 Study on porphyrin complex ligated with azaferrocene derivatives, published in 2002, which mentions a compound: 616-43-3, Name is 3-Methyl-1H-pyrrole, Molecular C5H7N, Safety of 3-Methyl-1H-pyrrole.

[5,10,15,20-Tetrakis(pentafluorophenyl)porphyrinato]iron complex ligated with azaferrocene has two crystal forms, while the corresponding complex ligated with 3-methylazaferrocene has only one crystal form. An introduction of Me substituent to the pyrrole ring makes a less stable complex.

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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

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, Research Support, Non-U.S. Gov’t, Bioresource Technology called Fast pyrolysis of microalgae remnants in a fluidized bed reactor for bio-oil and biochar production, Author is Wang, Kaige; Brown, Robert C.; Homsy, Sally; Martinez, Liliana; Sidhu, Sukh S., which mentions a compound: 616-43-3, SMILESS is CC1=CNC=C1, Molecular C5H7N, Electric Literature of C5H7N.

In this study, pyrolysis of microalgal remnants was investigated for recovery of energy and nutrients. Chlorella vulgaris biomass was first solvent-extracted for lipid recovery then the remnants were used as the feedstock for fast pyrolysis experiments using a fluidized bed reactor at 500 °C. Yields of bio-oil, biochar, and gas were 53, 31, and 10 weight%, resp. Bio-oil from C. vulgaris remnants was a complex mixture of aromatics and straight-chain hydrocarbons, amides, amines, carboxylic acids, phenols, and other compounds with mol. weights ranging from 70 to 1200 Da. Structure and surface topog. of the biochar were analyzed. The high inorganic content (potassium, phosphorous, and nitrogen) of the biochar suggests it may be suitable to provide nutrients for crop production The bio-oil and biochar represented 57% and 36% of the energy content of the microalgae remnant feedstock, resp.

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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

Safety of 3-Methyl-1H-pyrrole. 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: 3-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about Steric and Electronic Effects in Methyl-Substituted 2,2′-Bipyrroles and Poly(2,2′-Bipyrrole)s: Part II. Theoretical Investigation on Monomers. Author is Gatti, Carlo; Frigerio, Giovanni; Benincori, Tiziana; Brenna, Elisabetta; Sannicolo, Franco; Zotti, Gianni; Zecchin, Sandro; Schiavon, Gilberto.

The effects of N- and Cβ-Me substitution in pyrrole and 2,2′-bipyrrole were investigated through ab initio calculations and Atoms in Mols. anal. of the resulting wave functions. Replacement of a hydrogen atom with a Me group in pyrroles lowers the ionization potential, with substitution at C3 being more efficient than N-substitution because of the larger release of π population to the ring in the former case. Full geometry optimization at RHF/6-31G** level and as a function of the torsion angle τ between two adjacent rings demonstrates that the increasing loss of planarity in the 2,2′-bipyrrole, N,N’-dimethyl-2,2′-bipyrrole, and 3,3′-dimethyl-2,2′-bipyrrole series, adversely affects the pos. contributions expected from Me substitution. An intramol. interaction energy model shows that the greater anti-planarization energy of N,N’-dimethyl-2,2′-bipyrrole, as compared to 3,3′-dimethyl-2,2′-bipyrrole, is due to the larger decrease in the stabilizing electrostatic term and to the larger increase in the destabilizing nonbonding contribution which occurs at τ = 0° in the former. Calculations on the corresponding monocations and anal. of new conductivity measures on substituted poly(2,2′-bipyrrole)s suggest that the ease in achieving local chain planarity in doped polypyrroles should be more closely correlated to the anti-planarization energies of the charged monomers rather than to anti-planarization energies of the neutral monomers.

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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

Reference of 3-Methyl-1H-pyrrole. 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: 3-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about Management induced organic matter differentiation in grassland and arable soil: a study using pyrolysis techniques. Author is Nierop, Klaas G. J.; Pulleman, Mirjam M.; Marinissen, Joke C. Y..

Differences in agricultural management and land use lead to differences in soil structure, soil organic matter (SOM) dynamics and composition We investigated the SOM composition at 3 depth layers in a permanent pasture (PP), an organic arable (OA) and a conventional arable (CA) field within one soil series in marine loam deposits in The Netherlands. Both arable fields were in the grass phase of the rotation. The chem. composition of SOM was determined by a combination of conventional pyrolysis-gas chromatog./mass spectrometry (Py-GC/MS) and of thermally-assisted hydrolysis and methylation (THM) with tetramethylammonium hydroxide (TMAH). In PP, SOM was composed of relatively little decomposed, mainly grass-derived material comprising polysaccharides, lignin, aliphatic compounds (extractable lipids, cutin, suberin) and proteins. With depth, plant-derived constituents decreased, whereas microbial and humified material predominated. Both arable soils contained mainly strongly humified plant material and microbially altered proteineous material that showed heterocyclic N-compounds together with alkylbenzenes and phenols upon pyrolysis. With THM, small traces of plant-derived alkanols and cutin/suberin were observed in the arable soils. The upper layers of OA contained little lignin, which can only be derived from the grass vegetation or manure inputs since last plowing (2 yr before), since it was not found in the whole plow layer. Overall SOM composition is therefore hardly affected by organic farming compared to conventional management. The differences in SOM content and composition between the pasture and arable fields can be ascribed to differences in input and depth distribution of fresh organic materials. A difference in phys. protection of easily mineralizable SOM between pasture and arable soils is also likely to contribute.

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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

Related Products of 616-43-3. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 3-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about Characterization of site soil in the middle ages by Curie-point pyrolysis-gas chromatography/mass spectrometry. Author is Samukawa, Kisaburo; Simatani, Kazuhiko; Noda, Yoshimasa.

The site soils of Sakal city surrounded by moat in the middle ages were characterized by Curie-point pyrolysis GC/mass spectrometry;. The site soils of numbers 7 and 10 generated larger amounts of thermal decomposition products (e.g., acetonitrile, toluene, and pyrrole) then did other locations. The results suggested the possibility that private toilets existed.

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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

COA of Formula: C5H7N. 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: 3-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about Electrochemical properties and conductivity of poly(3-methylpyrrole/ClO4). Author is Gonzalez-Tejera, M. J.; Sanchez de la Blanca, E.; Carrillo, I.; Redondo, M. I.; Raso, M. A.; Tortajada, J.; Garcia, M. V..

Electrosynthesis of conducting poly(3-methylpyrrole) was carried out at fixed potentials of 0.5 and 0.6 V in a NaClO4 MeCN solution The electrochem. behavior of doped-polymer films was analyzed considering the influence of the neg. and pos. potential limits as well as the scan rate on the voltammograms recorded in MeCN. A mechanism for the redox processes is proposed. Polymer morphol. was examined by SEM, which reveals a cauliflower and compact texture depending on the potential of synthesis and deposition time. Kinetic of conductivity decay with aging time is dependent of exp(-t1/2) with a characteristic time of the degradation process around 20 days.

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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