A pure "Hydro-carbon" comprises a "Carbon-chain backbone", where each interstitial carbon carries 2xH, and the terminal carbons are "capped" by H:

 

H-,C'-,C'-...-,C'-H

(

,C' = H-C-H

)

Hydro-carbons are named "number-ane" (e.g., hexane).

 

 

A pure carbo-Hydrate -- what I would want to call a "Hydroxl-carbon" -- comprises the same sort of Carbon-chain backbone, but each interstitial carbon carries H+OH (and the terminal carbons are, again, "capped" by H):

 

H-,C"-,C"...-,C"-H

(

,C" = H-C-OH

)

Hydroxl-carbons (carbo-Hydrates) are named "number-ose" (e.g., hexose), where some of the middling carbons carry 2xH, and others H+OH ??

 

 

Is there such a thing, as a "mixed", "Hydro-carbo-Hydrate" (Hydro-Hydroxl-carbon) ??

Are you asking whether a hydrocarbon chain can carry multiple hydroxyl groups but not be a carbohydrate? The answer to that is, absolutely. The modern definition of a carbohydrate simply refers to it being a sugar, or a polyhydroxy aldehyde/ketone. So that leaves a whole bunch of potential compounds that have multiple hydroxyl groups, but that are not considered a carbohydrate.

Probably the best know example is ordinary alcohol.

Any combination of O, C, and H that doesn't fit the empirical formula [ce] C_{n}H_{2n}O_{n} [/ce] would fall under that category.

Any combination of O, C, and H that doesn't fit the empirical formula [ce] C_{n}H_{2n}O_{n} [/ce] would fall under that category.

 

I'm not sure about that. Ether, for example, isn't an alcohol and nor is acetone.

I'm not sure about that. Ether, for example, isn't an alcohol and nor is acetone.

 

I was saying that ether and acetone are not carbohydrates but contain C, H, and O whereas for example ribose does fit the above mentioned formula and is a "carbohydrate" in the biochem sense. Maybe we are answering different questions? I see your point.

He's specifically talking about compounds where some of the " carbons carry 2xH, and others H+OH ". That rules out ethers, esters, aldehydes, acids and ketones.

Thanks for the responses !