Hydrogen bonding in carboxylic acids

Section 19.3 Hydrogen bonding in carboxylic acids raises their- melting points and boiling points above those of comparably constituted alkanes, alcohols, aldehydes, and ketones. 

For a review of hydrogen bonding in carboxylic acids and acid derivatives, see Hadzi, D. Detoni, S. in Patai The Chemistry of Acid Derivatives, pt. 1 Wiley NY, 1979, p. 213. 

Figure 4.19 Intermodular hydrogen bonding in carboxylic acids...

Langner. R. Zundel, C. FTIR investigation of polarizable hydrogen bonds in carboxylic acid-pyridine complexes in... 

In this example the pressure level was low enough so that the true mixtures could be treated as ideal-gas mixtures. Moreover, hydrogen bonding in carboxylic acid vapors is a strong phenomenon, which even at normal pressures can be expected to dominate the fii K behavior. However, comprehensive treatments of the equation of stale must allow for both chemical and physical effects. The second virial coefficient correlation of Harden and O Connell and the modified van der Waals equation of Hu et al. provide examples. 

The simplest example of self-association in the vapor phase is dimerizatUm, as exemplified by hydrogen bonding in carboxylic acids. Consider the dimerization of acetic acid ... 

H hydrogen bonding In carboxylic acids 2500-3000 strong, very broad... 

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