LS-CN-Mn II HS) and terminal cyanide stretches, respectively. The IR spectrum also shows the characteristic ν=C-H and νC=N stretches at 3135 and 1625 cm -1 respectively coming from the 1methylimidazole ligand. In 1.des, the CN of {Cr II -CN-Mn II } unit is blue shifted to 2151 cm -1 while the terminal cyanide stretch shifts to 2123 cm -1 . Also, the O-H stretch at 3300 cm -1 vanishes which indicates the complete removal of ethanol molecules. Again in 1.res, the CN of {Cr II -CN-Mn II } unit comes back to 2150 cm -1 and the terminal cyanide shifts to 2133 cm -1 .