[diccup]

I try to separate water through hydrogen bond.

Among three molecules, isopropyl alcohol, DMSO, Acetone, which one has the strongest hydrogen bond with water?

Or which one is the strongest hydrogen sources among O-H, C=O, S=O.

Thank you so much, 

[orgoclear]

In first case i.e. O-H, the O can form Hydrogen bond along with the H attached to O. In C=O, only the O can form hydrogen bond with water and in S=O only O again. But in S=O the lone pair is mot as close to O as in C=O so the hydrogen bond would be the weakest

Hence the order of the hydrogen bonds is in the order O-H>C=O>S=O