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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: shehri on January 20, 2007, 10:56:22 AM

Title: cyclic dimmer structure
Post by: shehri on January 20, 2007, 10:56:22 AM

Hi all,

        What's meant by "cyclic Dimmer structure" of Carboxylic acids & why moleculer mass determination in non polar solvents like Benzene shows that Carboxylic Acid exists as cyclic dimmer?.Thanks.

Title: Re: cyclic dimmer structure
Post by: Yggdrasil on January 20, 2007, 10:12:16 PM

Carboxylic acids form dimers in non-polar, aprotic solvents because of hydrogen bonding between the acid groups.  The OH of the acid forms a hydrogen bond with the carbonyl oxygen of another acid and vice versa.