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