A compound,
C_(4)H_(4)O_(2)
, recovered from a reaction mixture has these important IR absorptions: a broad, parabola-shaped peak centered at
3200cm^(-1)
that is clearly separate from the
sp^(2)
and
sp^(2)C-H
region; an intense band at
1715cm^(-1)
; and a modestly strong peak at
1100cm^(-1)
. There is no moderately strong absorption around
1200cm^(-1)
. Based on this information,
C_(1)H_(16)O_(2)
most likely is a A carboxylic acid 8 diol C ester D hydroxy ketone MacBock Pro