How do we determine the molecular formula of a carbonyl species, #C_nH_(2n)O#?

1 Answer
Jul 16, 2017

Answer:

Without a molecular weight determination you are a shot bird..........

Explanation:

Formaldehyde, acetaldehyde, acetone, all the MONOFUNCTIONAL ketones and aldehydes have a formula of #C_nH_(2n)O#. For formaldehyde, #n=1#, but #n# could equal #2,3,4.........#, and generate the same empirical formula.....

TO get the molecular formula, you need a molecular weight determination. Got one?

A useful idea to develop in this context is the so-called degree of unsaturation. You have the one degree of unsaturation for this problem.