Please explain why if the 13C & 1H NMR spectrum data below is the possible structure of known compound ' 1-(4'-methyl-[1,1'-biphenyl]-4-yl)ethanone'? (Suzuki Cross-Coupling)
1H NMR:
2.41 ppm, 3H, singlet,
2.64 ppm, 3H, singlet,
7.27-7.29 ppm, 2H,doublet, aromatic -CH
7.53-7.54 ppm, 2H,doublet, aromatic -CH
7.67-7.68 ppm, 2H,doublet, aromatic -CH
8.01-8.03 ppm, 2H,doublet, aromatic -CH
13C NMR
22 ppm, -CH3 attached to the aromatic ring
26 ppm, -CH3 attached to the ketone carbonyl
127 ppm, aromatic -CH
129 ppm, aromatic -CH
130.5 ppm, aromatic -CH
135 ppm, aromatic -CH
137 ppm, aromatic -CH
145 ppm, aromatic -CH
197 ppm, carbonyl carbon of ketone
IR:
A band at 3040 cm-1 is a stretching frequency of the C-H bond of the
A band at 1672 cm-1 is a stretching frequency of the -C=O bond of ketone (alpha beta unsaturated ketone).
A band at 1598 cm-1 is a stretching frequency of the C=C bond of the aromatic ring.
A band at 1391 and 1362 cm-1 is a bending frequency of the C-H bond of the
A band at 1260 and 1131 cm-1 is a bending frequency of the C=O bond of the ketone.
A band at 824 cm-1 is a bending frequency of the C-H bond of the aromatic ring the aromatic ring must be para-disubstituted.
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