Über die Konstitution der dimeren Glykolaldehyde

Glycolaldehyde dimer in the stable crystal phase has axial OH groups: Raman, infrared and X-ray data analysis

“…The fact that it is the first sacharide found in the interstellar space [1] and the role it plays in the energy metabolism in humans [2], has motivated microwave [3] and conformational studies [4], [5], [6] and [7], electron beam radiation experiments [8], as well as infrared spectroscopic studies of molecules isolated in noble gases [9] or parahydrogen matrix [10]. In the solid state, pure glycolaldehyde exists in the form of a dimer [11] and [12]. Previous vibrational studies on solid glycolaldehyde were done by Michelsen and Klaboe [13] who compared infrared and Raman spectra of solid with the infrared spectrum of vapor, confirming centrosymmetric structure of the dimer as completely different from the monomer structure present in the vapor.…”

Reactions with Manganese (III) Acetate

“…are given by Szymanska-Buzar. 14 The magnetic susceptibility of anhydrous manganese (III) acetate in the region of 77 K (Jlelf= 3.4 JlB) to 294 K (Jlerr=4.37 #,B) is reported by Szymanska-Buzar.· 4 Using electron spin resonance de Klein I studied the disproportionation of manganese (III) acetate in acetic acid. assumed by many authors to explain their kinetics of oxidation.…”

“…After cooling to room temperature, the manganese (II) acetate was removed by filtration and the filtrate was distilled to afford 19 g of l'-methyl-},-phenyl butyrolactone, bp 104-106°C (0.1 mm). For preparative purposes it is sometimes convenient to use manganese (III) acetate generated in situ from KMnO 4 and Mn(II) acetate tetrahydrate without isolating and purifying the oxidant. In a typical experiment, 212 g (0.84 mol) of manganous acetate tetrahydrate was dissolved in 1200 ml of glacial acetic acid by raising the temperature to 90°C.…”

Studies on Density and Viscosity of Dysprosium Caproate and Caprylate in Methanol

“…The studies [1][2][3][4][5][6][7][8][9][10][11][12][13][14] on higher rare metal carboxylate have not been carried out systematically so far although these metal carboxylate have found wide applications in various industries. The present work deals with the density and viscosity measurement of the solution of dysprosium soaps (caproate and caprylate) in methanol.…”