Answer:
There are no H-bonds in fentanyl, and it is not soluble in water.
Step-by-step explanation:
Pure fentanyl has no hydrogen bonds, because it has no H atoms bonded to O or N.
Water can H-bond to the carbonyl O atom of the amide and to the N atom of the 3° amine in the piperidine ring.
However, these attractive forces are swamped by the nonpolar hydrophobic character of the benzene and piperidine rings.
As a result, Fentanyl is insoluble in water. Its solubility is only 20 mg/100 mL water.