Question

Part B - Pyranose Form vs. Furanose Form Consider the equilibrium between the pyranose forms of glucose (both α and β forms combined) and the furanose forms of glucose (both α and β forms combined) as follows: glucopyranose <--> glucofuranose The furanose forms are approximately 3.5 kcal/mol higher in energy than the pyranose forms. Given this information, what is the ratio of pyranose-form molecules to furanose-form molecules? Assume a temperature of 25 °C (298 K). Report your answer to the nearest ones.

Answer 1

Dear friend your answer is

The open-chain form is thermodynamically unstable, and it spontaneously isomerizes to the cyclic forms.

                       pyranose forms                            furanose forms
                        %-α            %-β                          %-α             %-β
                         36              64                             0.1           <0.2

Thank you.