![]() ![]() Not oxidized by air under ordinary conditions. V Ferro, M Mocerino, RV Stick and DMG Tilbrook. DMG spot testing, chemical analysis according to the EN 1811 reference method, and X-ray fluorescence spectroscopy (XRF) were performed concomitantly on 96. Characteristics: Nickel is a silvery-gray metal. An Improvement in the Preparation of Some Carbohydrate Benzylidene Acetals.XPS data show that oxygen near the surface is bonded to both Co and Ga, but in the film, oxygen is only bonded to Ga.\) The films exhibit only negligible carbon or nitrogen contamination, but the oxygen content is relatively high (10–20%). EDS analysis of the CoGa (1 : 2.4) and NiGa (1 : 2.0) films showed that stoichiometry of the precursors was principally retained. EDS and XPS data showed how film composition can be controlled by precursor design. Upon raising the temperature of the GaAs substrate to 630☌, 1 gave films with areas of epitaxial growth in a primarily polycrystalline β-CoGa film partial degradation of the substrate also occurs. MOCVD at 560☌ resulted in polycrystalline β-CoGa (using 1 as a precursor) and polycrystalline NiGa ( 2). The next peaks for both compounds corresponded to loss of the remaining ethyl groups. The highest peaks in the electron impact MS corresponded to (MWt py 2C 2H 5) , 1, and (MWt C 2H 5) , 2. Thermogravimetric analyses (TGA) under H 2 flow resulted in a residual mass of 35% at 650☌ for 1 (residual for CoGa 2 is 31%) and 29% at 500☌ for 2 (residual for NiGa 2 is 36%). It is therefore crucial to avoid the addition of too large an excess of the reagent because it may crystallize out with the chelate. GaEt 2)], 3 a single crystal X-ray structure was obtained for this product. An alcoholic solution of dimethyglyoxime (DMG) is used as the precipitating reagent during the experiment because DMG is only slightly soluble in water (0.063 g in 100 mL at 25 C). ![]() Complex 1 is easily hydrolyzed to [(py)(Et)Co(dmgH)(dmg GaEt 2) 2], 2, (dmg = dimethylglyoxime) were synthesized for study as potential precursors for Metalorganic Chemical Vapor Deposition (MOCVD) of β-CoGa and NiGa. ![]()
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