Month: November 2022

Schaad, David R. published the artcileActivation of amide nitrogen-hydrogen bonds by iron and ruthenium phosphine complexes, Synthetic Route of 359-38-6, the main research area is amide activation iron ruthenium complex; nitrogen hydrogen bond activation amide; hydride ruthenium iron activation amide.

The complexes cis-RuHR(dmpe)2 (R = naphthyl, dmpe = Me2PCH2CH2PMe2), cis-FeH2(dmpe)2, and FeH(C6H4PPhCH2CH2PPh2)(DPPE) readily activate the N-H bonds of amides, yielding trans-MH(NHCOR1)L2 (R1 = COCF3, COC6F5, COMe, etc., L = diphosphine) products. The formation and stability of the product depend on the natures of both the metal complex and the amide employed. For the more acidic amides (e.g., trifluoroacetamide and triflamide), product formation appears to proceed via protonation of the metal complex by the amide. In the presence of excess amide, trans-RuH(NHCOR)(dmpe)2 undergoes rapid exchange of the amido ligand but not the hydride ligand.

Journal of the American Chemical Society published new progress about H-N bond. 359-38-6 belongs to class amides-buliding-blocks, name is 2,2-Difluoroacetamide, and the molecular formula is C2H3F2NO, Synthetic Route of 359-38-6.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Zhou, Li published the artcileSelective Synthesis of Single-Handed Helical Polymers from Achiral Monomer and a Mechanism Study on Helix-Sense-Selective Polymerization, Recommanded Product: (S)-2-Methylpropane-2-sulfinamide, the main research area is helicity conformation single handed polyphenyl isocyanide preparation; chiral polymers; helix; helix-sense-selective polymerization; living polymerization; polymers.

Inspired by the exquisite helixes in nature, fabrication of helical materials with controlled handedness has attracted considerable attention. Herein, the authors report on precise synthesis of single left- and right-handed helical polyisocyanides through living polymerization of achiral monomers using chiral palladium catalysts under helix-sense-selective manner. Mechanism study revealed that the yielded helixes with opposite handedness showed different activity of the living chain end. The helix with unfavored handedness was self-terminated, while the one with favored handedness showed high activity and could undergo chain propagation to form a high mol. weight polymer with maintained single-handed helicity.

Angewandte Chemie, International Edition published new progress about Helicity. 343338-28-3 belongs to class amides-buliding-blocks, name is (S)-2-Methylpropane-2-sulfinamide, and the molecular formula is C4H11NOS, Recommanded Product: (S)-2-Methylpropane-2-sulfinamide.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Wu, Tsung-Tse published the artcileMeasurements of the dissociation conditions for methane hydrates with various additives of 1,2-epoxybutane, 2,3-dihydrofuran, N-methylformamide, 4-methylmorpholine, or 1-(2-furyl)methylamine, HPLC of Formula: 123-39-7, the main research area is methane hydrate sodium chloride phase equilibrium.

The exptl. phase equilibrium measurements for the dissociation conditions of methane hydrates in the presence of five additives are reported in this study. The isochoric method was employed to measure the three-phase (hydrate + liquid water + vapor, H-Lw-V) dissociation conditions (the three-phase equilibrium temperatures and pressures) under various concentrations of five additive compounds These additives include 1,2-epoxybutane that showed a promotion effect up to 2.6 K at a fixed pressure for the formation of methane hydrate. Other additives of 2,3-dihydrofuran N-methylformamide, 4-methylmorpholine and 1-(2-furyl)methylamine, however, all showed the inhibition effect from 1.3 up to 9 K. The possible structures of methane hydrates with these additives were estimated from the Clausius-Clapeyron equation by using the measured equilibrium temperature and pressure data. It is shown that with the additive of 1,2-epoxybutane, a sII hydrate structure might cause the promotion effect. The other four additives with inhibition effect all showed the possible sI structure. This study reports novel phase equilibrium data and verifies a useful screening method to select the available additives for natural gas production or transportation.

Fluid Phase Equilibria published new progress about Enthalpy. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, HPLC of Formula: 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Suganthi R., Josephine Usha published the artcileThe growth and characterization techniques of organometallic nonlinear optical crystal – Manganese mercury thiocyanate – Bis (N -methyl formamide), Synthetic Route of 123-39-7, the main research area is manganese mercury thiocyanate methyl formamide optical crystal growth.

Manganese mercury thiocyanate – bis (N -Me formamide) has been prepared to be a novel organometallic nonlinear optical crystal. The cell parameters of the grown crystals were obtained by single-crystal XRD anal. The second harmonic generation and optical transmittance of the grown crystal are studied by Kurtz and Perry powder technique and UV spectroscopic absorbance spectrum. The thermal anal. reveals that MMTN crystal possesses good physicochem. stability. The dielec. responses of the grown crystals are studied as a function of the temperature and the results are discussed.

Materials Today: Proceedings published new progress about Crystals. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Synthetic Route of 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Lin, Li-Dan published the artcileDevelopment of a new Lindqvist-like Fe6 cluster secondary building unit for MOFs, Name: N-Methylformamide, the main research area is hydroxymethyl pyridinylpropanediol iron Lindqvist cluster preparation crystal mol structure.

This work demonstrates a new Lindqvist-like [FeIII6(μ6-O)L4Cl6]2- (Fe6, L = 2-(hydroxymethyl)-2-(pyridin-4-yl)-1,3-propanediol) cluster for the construction of a novel class of Fe-cluster organic frameworks. The novel Fe6 cluster can be used to build not only a homometallic MOF, but also a heterometallic MOF by introducing copper halide clusters to the reaction system. In particular, the heterometallic MOF achieved a skillful combination of Fe6 SBU and cuprous-halide clusters for the first time. Our synthesis strategy opens up an effective avenue to novel Fe-cluster-based MOF materials.

Chemical Communications (Cambridge, United Kingdom) published new progress about Clusters. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Name: N-Methylformamide.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Otlyotov, Arseniy A. published the artcileConformational energies of microsolvated Na+ clusters with protic and aprotic solvents from GFNn-xTB methods, Synthetic Route of 123-39-7, the main research area is sodium methanol water cluster conformational potential correlation function; cluster-continuum theory; conformational analysis; microsolvation; semiempirical methods; sodium cation clusters.

Performance of contemporary tight-binding semiempirical GFNn-xTB methods for the conformational energies of singly charged sodium clusters Na+(S)n (n = 4-8) with 3 protic and 8 aprotic solvents is examined against the reference RI-MP2/CBS method. The median Pearson correlation coefficients of ρ = 0.84 (GFN2-xTB) and ρ = 0.82 (GFN1-xTB) do not give the clear preference to any tested approach. GFN1-xTB method demonstrates more stable performance than its GFN2-xTB successor with the average mean absolute errors (MAEs)/mean signed errors (MSEs) of 1.2/0.2 and 2.3/1.6 kcal mol-1, resp. Conformational energies produced by the computationally efficient DFT functional PBE and double-ζ basis set complemented with -D3(BJ) dispersion correction are suitable for the preliminary sampling (median ρ = 0.93), but should be used with a caution for the calculations of the average ensemble properties (MAE/MSE = 1.7/1.1 kcal mol-1). Higher-ranking PBE0-D3(BJ) and ωB97M-V with triple-ζ basis sets yield significantly lower MAEs/MSEs of 0.55/0.20 and 0.51/0.23 kcal mol-1, resp.

Journal of Computational Chemistry published new progress about Clusters. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Synthetic Route of 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Waghorne, W. Earle published the artcileA Study of Kamlet-Taft β and π* Scales of Solvent Basicity and Polarity/Polarizability Using Computationally Derived Molecular Properties, Product Details of C2H5NO, the main research area is solvent basicity polarity polarizability molicualr property.

The Kamlet and Taft solvent basicity parameter, β, and solvent polarity/polarizability parameter, π*, were analyzed in terms of properties of the solvent mols. derived from computational chem. The anal. of β, using a larger data set, confirms earlier conclusions that, for aprotic solvents, the basicity is determined by the partial charge on the most neg. atom of the solvent mol. and by the energy of the highest energy MO associated with the donor site. For alcs. and nitrogen bases containing N-H moieties, the β values deviate systematically from those for the non-hydrogen bonding solvents. Anal. of the polarity/polarizability parameter, π*, shows that it depends directly on the dipole moment, and quadrupolar amplitude of the solvent and on the energy of the HOMO, but decreases linearly with increasing solvent polarizability.

Journal of Solution Chemistry published new progress about Basicity. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Product Details of C2H5NO.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Ramya, Kunchanapalli published the artcileRoom-temperature cost-effective in-situ grown MAPbBr3 crystals and their characterization towards optoelectronic devices, Related Products of amides-buliding-blocks, the main research area is room temperature methylammonium lead bromidecrystal optoelectronic device.

We report the in-situ, room-temperature synthesis of methylammonium lead bromide CH3NH3PbBr3 crystals using N-Me formamide as a source of methylammonium (MA+) ions during the crystallization process to explore the structural, dielec., and electronic properties of CH3NH3PbBr3 crystals for optoelectronic applications. Optical absorption and radio-luminescence measurements affirm the direct bandgap nature of the crystals. Impedance spectroscopy measurements with various applied AC voltages within the 20 Hz-10 MHz frequency range depict the influence of ionic motions on elec. transport across crystal planes. We have extracted elec. transport parameters in CH3NH3PbBr3 crystals from the Nyquist plots, which we found to be distinctly varied wherein two different AC voltage amplitude regimes, broadly for 10-50 mV and 100-500 mV AC voltage range.

Materials Science & Engineering, B: Advanced Functional Solid-State Materials published new progress about Band gap. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Related Products of amides-buliding-blocks.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Soni, Yogesh published the artcileEffects of different concentration and combinations of cryoprotectants on sperm quality, functional integrity in three Indian horse breeds, Quality Control of 123-39-7, the main research area is glycerol dimethyl formamide toxicity cryoprotectant horse sperm breed; Acrosome integrity; Cryopreservation; Cryoprotectant; DMF; Glycerol.

Traditionally Glycerol (Gly) is being used as major cryoprotectant and its toxicity could be a reason for the variation on stallion sperm freezability and fertility. In an effort to minimize Gly toxicity alternative cryoprotective agents like DMF (DMF) have been investigated. The effect of the cryoprotectant and dose of cryoprotective agent varies from breed to breed and also from stallion to stallion within the same breed. Considering these factors a study was designed to study the effects of Gly and DMF at different concentrations and combinations on the plasma membrane, acrosome and DNA integrity as well as other post thaw seminal characteristics of semen of three Indigenous stallion breeds. In the current study, semen was collected from apparently healthy 4-6 years old 3 Marwari, 3 Manipuri and 3 Zanskari breed stallions. After semen collection and evaluation of fresh semen, each semen sample was extended with semen extender containing different concentrations and combinations of Gly and DMF cryoprotectants (i.e. 5% Gly, 5% DMF, 2% Gly, 2% DMF, 2.5% Gly +2.5% DMF and 1% Gly +1% DMF) and frozen. Post thaw semen evaluation was done on the basis of post thaw motility, live sperm count, hypo osmotic swelling test, acrosomal integrity and DNA integrity. Frozen thawed semen showed that the values of plasma membrane integrity, acrosome integrity and DNA integrity parameters were significantly higher (P < 0.05) with 5% DMF than the other cryoprotectants levels and combinations of Gly and DMF. From the present study, it was inferred that the combination of cryoprotectants at different concentrations (Gly and DMF @ 2.5 and 1%) also could not show better enhancement compared to the single cryoprotectant i.e DMF @5% in various post thaw seminal characteristics of Indigenous stallion semen. DMF at 5% concentration gave better protection to the plasma membrane and retained the acrosome and DNA integrity of the spermatozoa. Hence it can be concluded that DMF at 5% can be used for the cryopreservation of the Indigenous stallion with better preservation of the seminal quality. Cryobiology published new progress about Acrosome. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Quality Control of 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Hermes, Robert published the artcileFirst cryopreservation of phyllostomid bat sperm, HPLC of Formula: 123-39-7, the main research area is Carollia cryopreservation media sperm motility artificial insemination; Assisted reproduction technology; Methylformamide; Species conservation; Yangochiroptera.

Bats, the second-largest mammalian order, are widely distributed and provide crucial ecosystem services. Their reproductive biol. comprises noteworthy characteristics, such as long-term sperm storage, delayed implantation or even delayed fetal development. The understanding of these mechanisms remains limited. Research in reproductive biol. may become crucial for the conservation of endangered bat species. Indeed, the IUCN Red List of Threatened Species currently lists 76 bat species as endangered or critically endangered, for which conservation measures should be taken. The development of assisted reproductive technologies (ART) in bats would thus open new perspectives. In this context we here describe the first successful cryopreservation of bat sperm in the Seba′s short-tailed bat (Carollia perspicillata). Epididymal sperm of 30 males was pooled in 6 sample sets and diluted using four different cryo-diluents: Canifreeze, modified Canifreeze, BotuCrio and Test egg yolk extender. Glycerol and a mixture of glycerol and methylformamide were used as cryoprotectants. Best post-thaw results were achieved when sperm was diluted in Test egg yolk extender containing a mixture of glycerol and methylformamide as cryoprotectant. Post-thaw sperm motility, progressive motility and acrosome integrity of 42.0 ± 3.4%, 28.3 ± 6.3% and 87.7 ± 1.7%, resp. were superior to all other variants tested. It remains to be determined if the post-thaw quality of cryopreserved bat spermatozoa achieved in this study is sufficient for the use in artificial inseminations and produces acceptable pregnancy rates. Successful cryopreservation of spermatozoa in C. perspicillata may serve as the first model to establish gamete rescue programs and develop ART in other, critically endangered bat species.

Theriogenology published new progress about Acrosome. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, HPLC of Formula: 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics