C
10
H
8
in CDCl
3
7 DBE
First steps
Double bond equivalents,
Integration
From the molecular formula, 7 double bond equivalents can be derived immediately.
The high number of double bond equivalents, only proton signals between
and , further only carbon signals in the range of to , and
finally no oxygen at all quickly suggests the solution naphthalene.
However, in napththalene we would expect only 3 carbon signals and 2 proton
multiplets because of the inherent high symmetry. The compound presented here
shows 5 proton multiplets and 6 carbon signals.
One approach to avoid falling into the naphthalene trap again and again is to first
collect the data that can be easily extracted. It is possible that ideas for the further
procedure will develop from there. The proton spectrum is a good place to start.
For the moment we write down the number of double bond equivalents on a
small sticky note.