Please explain the formation of D-fructofuranose form D-fructose. Thank you.
Dear student,
The crystalline structure of fructose forms a cyclic 6 membered structure to attain the stability of the hemiketal and internal hydrogen bonding. This structure is called as D-fructopyranose. When converted to solution form, the fructose, it occurs in an equilibrium mixture of fructopyranose of about 70% and fructofuranose of about 22% and the remaining as acyclic structures.
The crystalline structure of fructose forms a cyclic 6 membered structure to attain the stability of the hemiketal and internal hydrogen bonding. This structure is called as D-fructopyranose. When converted to solution form, the fructose, it occurs in an equilibrium mixture of fructopyranose of about 70% and fructofuranose of about 22% and the remaining as acyclic structures.