why does formic acid forms dimer

Asked by Sumitra Mandal | 30th Nov, 2013, 07:48: AM

Expert Answer:

This is due to the presence of hydrogen bonding.

At high pressure or in the vapor phase, formic acid consists of hydrogen bonded dimers rather than individual molecules. In the gas phase, significant deviations from the ideal gas law arise as a result of this hydrogen bonding. Each hydrogen atom forms a partial covalent bond with two atoms rather than one. 

Answered by Hanisha Vyas | 2nd Dec, 2013, 12:04: PM

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