Question

Write the IUPAC name of $\mathrm{HCHO}$.

Answer 1

Step 1: Determination of root word:

1. Choose the chain with the maximum Carbon atoms.
2. Because there is only one Carbon atom in this chain, the root word will be "Meth."

$\mathrm{H}\stackrel{1}{\mathrm{C}}\mathrm{HO}$

Step 2: Determination of names and position of Locants:

1. In the given chain the one Aldehyde group is present.

Step 3: Determination of suffix and prefix:

1. As this compound is saturated and the functional group is the Aldehyde, the suffix is “al”
2. "Methane" is used as a prefix in IUPAC names for one Carbon atom.

Therefore, IUPAC name of $\mathrm{HCHO}$ is Methanal. It is commonly known as Formaldehyde.