[lloydy]

Is there a way of removing the 0₂ from the sugar Glucose C₆H₁₂0₆? I would really aprecitate if you answered as this would be useful for my science project.

Lloydy

[Donaldson Tan]

this seems like a tricky problem. attached is the structure of glucose. it's possible to substitute the -OH with something else but the oxygen in the ring is the one that is really headache. removing that oxygen involves breaking down glucose completely.

[GCT]

I would suggest that you first observe the structure of glucose.  Are you asking to somehow produce oxygen gas through a reaction where glucose is one of the reactants?

[Mitch]

Write a chemical equation.  

[jdurg]

this seems like a tricky problem. attached is the structure of glucose. it's possible to substitute the -OH with something else but the oxygen in the ring is the one that is really headache. removing that oxygen involves breaking down glucose completely.

Yeah, that's actually quite easy.  Replace the -OH with -Cl and you have the latest craze known as 'Splenda'.   :biggrin2:

[lloydy]

what im really after is

Glucose + "something" = a carbohyrdate +oxygen

or something along those lines

[constant thinker]

Sugars are carbohydrates right? Just simple ones. Research enzymes that our bodies use to break down sugar or try the chlorine trick.

[Garneck]

I think he ment "hydrocarbons"  

[miaskows]

Reaction that you actually have to carry out if you would like to remove O from sugars , it is Hydrogenolysis of their -OH and -COH groups  ( Hydro-de-Hydroxylation).
For example :
C6H12O6 + 7H2 (catalist)=C6H14 + 6H2O
Glucose is aldehydo alcohol and the hydroxyl groups (and aldehydo ones  that reduced  via -OH) of most primary and secondary alcohols  can seldom be cleaved by catalitic hydrogenation, but they can be reduced indirectly by conversion to a sulfonate and reduction of that compound with LiAlH4 as follows:
1)RCH2OH + SO3-Pyridine  = RCH2O-Sulfonate
2)RCH2O-Sulfonate + LiAlH4= RCH3 + ...
The two reactions can be carried out without isolation of the sulfonate if the alcohol is treated with pyridine-SO3 in Tetra Hydro Furane and then LiAlH4 added.

There are another methods for reducing of alcohols (and sugars), for example so called Barton-McCombie reaction:
1)Converting of sugar to carbonate derivative:
RCH2OH + COCl2 = RCH2-O-CO-O-(RCH2) + HCl+ ...
2) Reducing of the carbonate with appropriated radicals producing compound (as AIBN)
RCH2-O-CO-O- + AIBN= RCH3 +...

[miaskows]

If you still insist on producing of  carbohydrates from sugars along with O2 as by product ,you can try electrolisis (reducing by electrolisis, has been described in the literature) as follows:
(simplest case-alphaGlucose)
C5(OH)5COH  (e) = C6(OH)nHm+ xO2
By carefully choosing of conditions(solvent, curient of electricity,concentration etc) you can obtain all of possible  products of reducing.

[xiankai]

it sounds like the breaking of glucose into carbohydrases, where oxygen is then circulated bloodstream.

maybe u guys could put it into layman terms? im having a headache :X

[miaskows]

I am still with that glucose "stripping off oxygen atoms" topic. Actually it is sounds as somthing great: solving of world's petroleum shortage by obtaining of  hydrocarbons (like hexane C6H14, component of  fuels) from cheap renewable natural search (sugars by hydrolysis of wood cellulose etc).
The topic itself may be considered as worth it's own serious forum.
Then there is one another method for reducing of glucose:
CH2OH-(CH-OH)4-COH + HI (heating)=
CH3-CHI-(CH2)3-CH3 +H2O+I2

CH3-CHI-(CH2)3-CH3 +H2 (catalist)=
CH3-(CH2)4-CH3 +HI
(I2 and HI could be easily recuperated)

<The mentioned above methods needs to be cross checked (the equations has been taken from the book of Org.Chem., but there could be mistakes everywhere now days, you know...)>

[lloydy]

I am still with that glucose "stripping off oxygen atoms" topic. Actually it is sounds as somthing great: solving of world's petroleum shortage by obtaining of  hydrocarbons (like hexane C6H14, component of  fuels) from cheap renewable natural search (sugars by hydrolysis of wood cellulose etc).

Yup, this is what i am in essence trying to do. Have u anyidea on a catalyst for this reaction?

[xiankai]

he did write down hydrogen as a catalyst..

[miaskows]

Between common used catalysts of hydrogenation are Raney nickel, palladium-on-carcoal, platinum metal or its oxide and others.