Question
Is anyone familar with the equilibrium reactions that convert the ketone group of fructose into an aldehyde group so fructose give a positive Fehling's Test? I know it will as we received so in class but not sure how the reaction takes place.
Answers
DrBob222
It's explained at this site. Scroll down to the first paragraph under Figure 2 (about 60% down the page). Fructose is converted to glucose and mannonse under th alkaline conditions of the Fehling's test solution.
DrBob222
I didn't post the site. Here it is.
http://www.chemie.uni-regensburg.de/Organische_Chemie/Didaktik/Keusch/D-Fehling-e.htm
http://www.chemie.uni-regensburg.de/Organische_Chemie/Didaktik/Keusch/D-Fehling-e.htm
John
DrBob,
Does Figure 2 demonstrate that Fructose is giving a positive result (as an aldose)even though it has been converted to glucose and manose? Thanks for the clarification.
Does Figure 2 demonstrate that Fructose is giving a positive result (as an aldose)even though it has been converted to glucose and manose? Thanks for the clarification.