Posted by Laura on Saturday, February 21, 2009 at 10:12pm.
The carboxylic acids are quite polar and they form hydrogen bonding just as alcohols, ketones and aldehydes do; HOWEVER, a pair of acids is held together by TWO hydrogen bonds instead of the one formed by alcohols, ketones, and aldehydes.
I've tried to draw a structure to chow you on this board and can't do it. But the OH of one COOH is hydrogen bonded to an O on the COOH of another molecule and the other molecule in turn bonds its OH with the O on the first molecule. So we have quasi dimers.
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