An Ultraviolet−Raman Spectroscopic Investigation of Magnesium Chloride−Ethanol Solids with a 0.47 to 6 Molar Ratio of C2H5OH to MgCl2

MgCl 2 and C 2 H 5 OH form complexes over a wide range of C 2 H 5 OH to MgCl 2 molar ratios. MgCl 2 (C 2 H 5 OH) x adducts prepared over a wide composition range, x = 0.47 to 6, have been studied by ultraviolet Raman spectroscopy. These studies indicate the breaking of the Mg−Cl bonds at x ≥ 2. The Raman shift of the O−H stretch shifts in the 3230−3480 cm -1 range as the C 2 H 5 OH to MgCl 2 molar ratio is altered and thus, it can be used to monitor the MgCl 2 (C 2 H 5 OH) x composition. It is suggested that the presence of the peak at 683 cm -1 may be attributed to the totally symmetric breathing mode of Mg−O octahedra, reinforcing the structure analysis of MgCl 2 (C 2 H 5 OH) 6 .