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

MgCl2 and C2H5OH form complexes over a wide range of C2H5OH to MgCl2 molar ratios. MgCl2(C2H5OH)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 C2H5OH to MgCl2 molar ratio is altered and thus, it can be used to monitor the MgCl2(C2H5OH)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 MgCl2(C2H5OH)6.