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2.4 Signal Intensity
Some bonds absorb IR radiation more efficiently than others.
The efficiency of a bond depends on the magnitude of the dipole moment.
The bonds have a measurable dipole moment, but they differ in size.
The carbonyl group is analyzed first.
The carbon atom has a partial positive charge and the oxygen atom has a partial negative charge.
The carbonyl group has a large moment.
Let's look at the C bond.
One vinylic position is connected to hydrogen atoms, while the other is connected to alkyl groups.
The vinylic position with two alkyl groups is slightly more electron-rich than the other vinylic position.
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