Which compound has the lower melting point? CH33CCH2OH CH33CCHO

The compounds mentioned in the question seem to be incorrectly written. However, if we assume that the compounds are CH3CH2OH (ethanol) and CH3CHO (acetaldehyde), we can compare their melting points.

1. Identify the type of intermolecular forces in each compound:

   Ethanol (CH3CH2OH) has hydrogen bonding due to the presence of an -OH group. Acetaldehyde (CH3CHO) has dipole-dipole interactions due to the presence of a polar C=O bond.

2. Compare the strength of the intermolecular forces:

   Hydrogen bonding is a stronger intermolecular force than dipole-dipole interactions.

3. Relate the strength of the intermolecular forces to the melting point:

   The stronger the intermolecular forces, the higher the melting point. Therefore, ethanol (CH3CH2OH) with hydrogen bonding should have a higher melting point than acetaldehyde (CH3CHO) with dipole-dipole interactions.

So, acetaldehyde (CH3CHO) should have a lower melting point than ethanol (CH3CH2OH).