Hello to all: Where can I find a list of all Carboxylic acids and Hexose acids? Is
there an easy way to tell them apart? Can a substrate be both? Can a
Carboxylic acid also be considered a Dicarboxylic acid? I need a good
resource to find differences between, say, Gluconic and Glucuronic
acids. Some internet resources say that Guconic acid is a Hexose acid
while Glucuronic acid is a Carboxylic acid, others say they are both
Hexose acids.. I am researching microbial metabolic substrates but need
some fundamental background. Any help is greatly appreciated. Thank you!

I see Hexose acids are derived from oxidized hexose sugars - i.e., sugars with six Carbon molecules.

 

And Carboxylic acids are derived from sugars that have a carboxyl group on one of the carbons while Dicarboxylic acids have two carboxyl groups.

 

I assume that means that one molecule, say Glucuronic acid, could be both a Hexose acid, and also be a Carboxylic acid.

 

Also, Malic acid has two carboxyl groups and therefore is simultaneously a Carboxylic acid and a Dicarboxylic acid (though the default would be Dicarboxylic acid as it is more descreptive?)

 

Any further feedback or direction to resources is greatly appreciated.

I'm not sure what you mean by hexose acid as this is not a standard term. Carboxylic acids are organic compounds containing a -COOH group, where one of the oxygens is double bonded to the carbonyl carbon and the other is an OH group bound to the same carbon. The H on the OH part of the functional group is acidic and fairly easily removed. You would not find a list of all carboxylic acids because this would be too broad of a category and the number of compounds that could contain such a functionality would be extremely large.

 

Gluconuronic acid contains a carboxylic acid group at the C-6 position and is a derivative of normal glucose, which would normally contain an OH group at the C-6 position. Thus you would say that gluconuronic acid is a carboxylic acid.

 

Malic acid contains two individual carboxylic acid groups, which means you would refer to it as a diacid or a dicarboxylic acid.