Draw the structures of all possible isomers of the compound with molecular formula C3H6O.  Given that this compound produces a strong IR absorption at 1725cm-1 . Which isomer is most  consistent with the given data?  b) The O-H stretching of an alcohol in a solution of CH2Cl2 changes with concentration, appearing  very broad at high concentration and becoming sharper as the concentration decreases. Explain this  observation into detail.