In the vapour phase, two molecules of Acetic acid () associate to form a highly stable, cyclic hydrogen-bonded dimer. What is the exact total number of atoms (Carbon, Oxygen, and Hydrogen combined) th

Question

In the vapour phase, two molecules of Acetic acid ($CH_3COOH$) associate to form a highly stable, cyclic hydrogen-bonded dimer. What is the exact total number of atoms (Carbon, Oxygen, and Hydrogen combined) that constitute the primary ring structure of this specific cyclic dimer?

Prashant Kotian · Accepted Answer

Correct answer: 8. The dimer is formed by two hydrogen bonds linking two acetic acid molecules: . Tracing the contiguous loop formed by these interactions yields: C, O, H, O, C, O, H, O. Counting these strictly gives an 8-membered cyclic ring.

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