In these so-called clathrates, the organic "guest" molecules are held in channels formed by interpenetrating helices composed of hydrogen-bonded urea molecules. In this way, urea-clathrates have been well investigated for separations.

Reactions

Basicity

Urea is a weak base, with a pK of 13.9. When combined with strong acids, it undergoes protonation at oxygen to form uronium salts. It is a Lewis base,

1.Previous
3.Next