B.P Higher boiling points than similar alcohols,due to dimer formation b.p.°C Formaldehyde -21° Methanol 64° Formic acid 100P Acetaldehyde 21° Ethanol 78 Acetic acid 118 0H一0 R- Acetic acid,b.p.118C hydrogen-bonded acid dimer❖B.P Higher boiling points than similar alcohols, due to dimer formation Acetic acid, b.p. 118C