7429-90-5 Chlorination of aluminium-copper alloys

 The chlorination of Al-Cu alloys is investigated by thermogravimetry, X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, and energy dispersive X-ray fluorescence, between 200 and 500 °C. The starting temperature for the chlorination of selected alloys is determined. Results indicate that the reactivity of the alloys is different from that of the pure metals. Analysis of the reaction products reveals that there are interactions between the different chlorides formed. These interactions lead to an enhancement in the copper chlorides volatilization and the formation of well-developed crystals of CuCl2 instead of the mixture of CuCl2 and CuCl that is obtained in the chlorination of pure copper. A schematic diagram that describes the chlorination mechanisms for the pure metals and AlCu alloys is presented. https://www.lookchem.com/CASDataBase_7429-90-5.htm

评论

发表评论

此博客中的热门博文

100-48-1 In situ immobilized palladium nanoparticles on surface of poly-methyldopa coated-magnetic nanoparticles (Fe3O4@PMDA/Pd): A magnetically recyclable nanocatalyst for cyanation of aryl halides with K4[Fe(CN)6]

Poly-methyldopa (PMDP)-coated Fe 3 O 4 nanoparticles (Fe 3 O 4 @PMDP) have been synthesized through a simple and green procedure. In the present study, for the first time, Pd nanoparticles were successfully deposited using Fe 3 O 4 @PMDP as a core-shell magnetic coordinator and stabilizer agent. In this protocol, Pd ions were adsorbed on surfaces of Fe 3 O 4 @PMDP through immersion of the PMDP-coated Fe 3 O 4 nanoparticles into a palladium plating bath. Next, they were reduced in situ to palladium nanoparticles using PMDP's N-containing groups and reducing ability. The structure, morphology and physicochemical properties of the synthesized nanoparticles were characterized by different analytical techniques such as energy-dispersive X-ray spectroscopy (EDS), field emission scanning electron microscope (FESEM), Fourier-transform infrared spectroscopy (FT-IR) spectroscopy, high resolution transmission electron microscopy (HR-TEM), inductively coupled plasma (ICP), thermo gravimetric
阅读全文

767-58-8 The Photochemistry of Conformationally Rigid Benzylic Esters: 2,2-Dimethyl-1-indanyl Acetates and Pivalates

The photochemistry, in methanol, of substituted 2,2-dimethyl-1-indanyl acetates 9a-c and pivalates 10a-c has been studied.In agreement with previous studies on benzylic esters, the results show that the substituents change the yield of products derived from the ion pair.The mechanistic conclusion reached is that the substituents change the oxidation potential of the indanyl radicals and thus the rate constant of electron transfer for converting the radical pair to the ion pair.The results also reveal two other substituent effects.First, substituents can increase the overall efficiency of the photoreaction by enhancing homolytic cleavage.The second effect is conformational.In compounds where the bond that is cleaving is conformationally mobile, such as the C-O bond in benzylic esters, substituents on the ring can change the population of the reactive conformer and thus the overall efficiency of the reaction.For the indanyl acetate esters, the difference in excited-state reaction rate be
阅读全文

7439-96-5 Preparation, characterization and thermal reactivity of n,n-dimethylformamide complexes of some transition metal chlorides

The coordination adducts of MnCl 2 , FeCl 3 , CoCl 2 , NiCl 2 and CuCl 2 with DMF were isolated and characterized by elemental analysis, magnetic moments, UV-VIS spectroscopy, IR spectroscopy and thermal analysis techniques. The shift of the CO stretching vibration to low frequency indicated that DMF is bonded through oxygen to the metals. On the basis of spectral and elemental analysis data, the complexes have dimeric and trimeric structures achieved by the chlorine bridges. The complexes do not have melting points and undergo decomposition after dehydration. The decomposition of DMF in the complexes occurs in several stages and the last stages of decomposition always corresponds to decomposition or sublimation of the respective metal chlorides to produce the respective metal. https://www.lookchem.com/CASDataBase_7439-96-5.htm
阅读全文