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.
![](https://s3mn.mnimgs.com/img/shared/content_ck_images/ck_5afc6241cb043.png)
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.
![](https://s3mn.mnimgs.com/img/shared/content_ck_images/ck_5afc6241cb043.png)