Is vanillin an aldehyde or a ketone
Aldehydes are organic compounds that contain an aldehyde group -CHO. Here are a few examples of aldehydes:
Formaldehyde, acetaldehyde and 2-methyl-undecanal belong to the alkanals within the aldehydes, i.e. to the aldehydes derived from an alkane.
- Formaldehyde is derived from methane and is therefore also called methanal. Methanal is the simplest aldehyde of all, it basically consists of a carbonyl group that is connected to two hydrogen atoms.
- Acetaldehyde, or ethanal, derived from ethane, is the second simplest aldehyde. In the human metabolism, ethanal is formed when ethanol is broken down.
- 2-methyl-undecanal is derived from 2-methyl-undecane. This connection became known because it is an important component of the famous Chanel Nº 5 perfume.
The other four aldehydes in the figure do not belong to the alkanals, they are more complex and contain a benzene ring apart from citral A.
- Benzaldehyde is the simplest aromatic aldehyde. It occurs, among other things, in white wine and determines the aroma of the wine. Apart from that, benzaldehyde is harmful to health.
- Vanillin is the most important flavoring substance in spiced vanilla.
- Cinnamaldehyde is the main flavoring of the bark of the cinnamon tree.
- Finally, citral, our last example of aldehydes, is a fragrance found in tomatoes, among other things.
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