Part 7: LABORATORY

From the chemical tests we get:

The IR absorption at about 1700 cm-1 indicates the presence of a C=O.

The H NMR data tells us:

Summary....
Functional group tests and IR data suggest a ketone, C=O.
H NMR 2 x doublets in the aromatic region suggests a para disubstituted benzene, C6H4, and two alkyl groups -CH2CH3 and -CH3

Altogether...

The fragments we have are :C6H4, -CH2CH3, -CH3, and C=O

(two middles and two ends)

Assembling the pieces....The chemical tests indicate a methyl ketone...

 

p-ethylacetophenone

The final step should always be to check what you have drawn. The easiest thing to check is usually the coupling patterns you would expect to see, and the chemical shifts of each unit.  You should be asking yourself : "Does my answer give me what the H-nmr shows ?"

Common general errors:

Poor interpretation of FG tests, could not interpret the simple coupling patterns from the H NMR.