123-39-7Relevant articles and documents
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Morawetz,Otaki
, p. 463,465 (1963)
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Effects of Carbon-Bound Deuterium on the Affinities of Acetaldehyde-1-d and N-Methylformamide-1-d for Solvent Water
Wolfenden, Richard,Kirkman, Sue
, p. 731 - 732 (1983)
With deuterium present in the formyl group, the equilibrium constant for transfer of N-methylformamide from chloroform to D2O at 25 deg C was encanced by factor of 3.1 +/- 0.15 percent, as estimated independently by proton magnetic resonance and by double-labeling experiments in which 14C and 3H were incorporated alternatively into the methyl group.The distribution coefficient of acetaldehyde-1-d between D2O and the vapor phase, on the other hand, differed from that of acetaldehyde by less than 0.5percent.
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Carpenter,W.,Bens,E.M.
, p. 59 - 65 (1970)
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The Generation of N-Alkylformamides from Synthesis Gas and Ammonia
Knifton, John F.
, p. 1412 - 1414 (1985)
N,N-Dimethylformamide and N-methylformamide have been prepared from synthesis gas plus ammonia via ruthenium 'melt' catalysis.
Thermal behavior of ammonium dinitramide and amine nitrate mixtures
Matsunaga, Hiroki,Katoh, Katsumi,Habu, Hiroto,Noda, Masaru,Miyake, Atsumi
, p. 2677 - 2685 (2019)
This paper focuses on the thermal behavior of mixtures of ammonium dinitramide (ADN) and amine nitrates. Because some mixtures of ADN and amine nitrate exhibit low melting points and high-energy content, they represent potential liquid propellants for spacecraft. This study focused on the melting behavior and thermal-decomposition mechanisms in the condensed phase of ADN/amine nitrate mixtures during heating. We measured the melting point and exothermal behavior during constant-rate heating using differential scanning calorimetry and performed thermogravimetry–differential thermal analysis–mass spectrometry (TG–DTA–MS) to analyze the thermal behavior and evolved gases of ADN/amine nitrate mixtures during simultaneous heating to investigate their reaction mechanisms. Results showed that the melting point of ADN was significantly lowered upon the addition of amine nitrate with relatively low molecular volume and low melting point. TG–DTA–MS results showed that the onset temperature of the thermal decomposition of ADN/amine nitrates was similar to that of pure ADN. Furthermore, during thermal decomposition in the condensed phase, ADN produced highly acidic products that promoted exothermic reactions, and we observed the nitration and nitrosation of amines from the dissociation of amine nitrates.
Development of an empirical kinetic model for sonocatalytic process using neodymium doped zinc oxide nanoparticles
Khataee, Alireza,Vahid, Behrouz,Saadi, Shabnam,Joo, Sang Woo
, p. 146 - 155 (2016)
The degradation of Acid Blue 92 (AB92) solution was investigated using a sonocatalytic process with pure and neodymium (Nd)-doped ZnO nanoparticles. The nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The 1% Nd-doped ZnO nanoparticles demonstrated the highest sonocatalytic activity for the treatment of AB92 (10 mg/L) with a degradation efficiency (DE%) of 86.20% compared to pure ZnO (62.92%) and sonication (45.73%) after 150 min. The results reveal that the sonocatalytic degradation followed pseudo-first order kinetics. An empirical kinetic model was developed using nonlinear regression analysis to estimate the pseudo-first-order rate constant (kapp) as a function of the operational parameters, including the initial dye concentration (5-25 mg/L), doped-catalyst dosage (0.25-1 g/L), ultrasonic power (150-400 W), and dopant content (1-6% mol). The results from the kinetic model were consistent with the experimental results (R2 = 0.990). Moreover, DE% increases with addition of potassium periodate, peroxydisulfate, and hydrogen peroxide as radical enhancers by generating more free radicals. However, the addition of chloride, carbonate, sulfate, and t-butanol as radical scavengers declines DE%. Suitable reusability of the doped sonocatalyst was proven for several consecutive runs. Some of the produced intermediates were also detected by GC-MS analysis. The phytotoxicity test using Lemna minor (L. minor) plant confirmed the considerable toxicity removal of the AB92 solution after treatment process.
Thermal Decomposition of Energetic Materials. 3. Temporal Behaviors of the Rates of Formation of Gaseous Pyrolysis Products from Condensed-Phase Decomposition of 1,3,5-Trinitrohexahydro-s-triazine
Behrens, Richard,Bulusu, Suryanarayana
, p. 8877 - 8891 (1992)
Through the use of simultaneous thermogravimetry modulated beam mass spectrometry (STMBMS) measurements, time-of-flight (TOF) velocity-spectra analysis, and (2)H, (13)C, (15)N and (18)O labeled analogues of 1,3,5-trinitrohexahydro-s-triazine (RDX), the thermal decomposition products of RDX have been identified as H2O, HCN, CO, CH2O, NO, N2O, NH2CHO, NO2, HONO, (CH3)NHCHO, oxy-s-triazine (OST), and 1-nitroso-3,5-dinitrohexahydro-s-triazine (ONDNTA) and all of their gas formation rates have been measured as a function of time.From these results the primary reaction pathways that control the decomposition of RDX in both the solid and liquid phases have been discovered.Four primary reaction pathways control the decomposition of RDX in the liquid phase between 200 and 215 deg C.Two pathways are first-order reactions solely in RDX.One produces predominantly OST, NO, and H2O and accounts for approximately 30percent of the decomposed RDX, and the other produces predominantly N2O and CH2O with smaller amounts of NO2, CO, and NH2CHO and accounts for 10percent of the decomposed RDX.The third pathway consists of formation of ONDNTA by reaction between NO and RDX, followed by the decomposition of ONDNTA to predominantly CH2O and N2O.The fourth reaction pathway consists of decomposition of RDX through reaction with a catalyst that is formed from the decomposition products of previously decomposed RDX.The third and fourth reaction channels each account for approximately 30percent of the decomposed RDX.Experiments with solid-phase RDX have shown that its decomposition rate is very much slower than that of liquid-phase RDX.ONDNTA is the only product that appears to be formed during the early stages of decomposition of RDX in the solid phase.As the solid-phase decomposition progresses, N2O and lesser amounts of CH2O start to evolve and their rates of evolution increase until products associated with the liquid-phase RDX decomposition appear and the rates of gas formation of all products rapidly increase.This behavior strongly suggests the decomposition of solid RDX occurs through formation of ONDNTA within the lattice, the subsequent decomposition of it within the lattice to N2O and CH2O, followed by the dispersion of CH2O in the RDX, leading to its eventual liquefaction and the onset of the liquid-phase decomposition reactions.
N-Heterocyclic carbene catalyzed direct carbonylation of dimethylamine
Li, Xiaonian,Liu, Kun,Xu, Xiaoliang,Ma, Lei,Wang, Hong,Jiang, Dahao,Zhang, Qunfeng,Lu, Chunshan
, p. 7860 - 7862 (2011)
N-Heterocyclic carbene (NHC) catalyzed direct carbonylation of dimethylamine leading to the formation of DMF was successfully accomplished under metal-free conditions. The catalytic efficiency was investigated and the turnover numbers can reach as high as >300. The possible mechanism was also proposed.
Synthetic method of N-mono-substituted alkyl formamide
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Paragraph 0044; 0045; 0046; 0047; 0048-0063; 0066; 0067, (2019/10/01)
The embodiment of the invention discloses a synthetic method of N-mono-substituted alkyl formamide. The synthetic method comprises the steps of enabling primary amine compounds to react with carbon monoxide, distilling, and rectifying to obtain the N-mono-substituted alkyl formamide under the catalytic action of a sodium alkoxide-alcohol solution, wherein the molar ratio of the primary amine compounds to the sodium alkoxide-alcohol solution is 1 to (0.002 to 0.008); according to the synthetic method disclosed by the invention, through selecting specific materials, the N-mono-substituted alkylformamide can be synthesized through a one-step method under the action of a specific catalyst, and the synthetic method has the advantages that the process is simple, no by-product is produced, the source of raw materials are rich, the cost is low, the production efficiency can be improved effectively, and the production cost can be reduced; in addition, the yield and purity of synthetic productscan also be improved.