How many degrees of unsaturation are in a compound with the formula c5h6f3n?

The degree of unsaturation can be calculated as

#C + 1 - (#H + #halogens)/2 + #N/2 . .in you case that is

5 + 1 - (9/2) + 1/2 = 2

There are 2 degrees of unsaturation . . .two double bonds or one triple bond. A closed ring also counts as one degree of unsaturation.
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