Why is acetaminophen more polar than aspirin?
How can you tell which bond is more polar?
They can occur between two ions in an ionic bond or between atoms in a covalent bond; dipole moments arise from differences in electronegativity. The larger the difference in electronegativity, the larger the dipole moment. The dipole moment is a measure of the polarity of the molecule.
How is dipole moment related to polarity?
Polar molecules occur when there is an electronegativity difference between the bonded atoms. Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out.
Benzene is a nonpolar molecule due to the presence of many nonpolar carbon-hydrogen bonds spaced out in equal proportion around the molecule ring. It is a symmetrical molecule in which all the bond dipoles cancel.
Which analgesic is most polar?
Aspirin has the third highest R F value with two dipole-dipole forces and one hydrogen bond, almost identical to the R F value of Phenacetin. Acetaminophen has two hydrogen bonds and one dipole-dipole making it more polar than Aspirin, Phenacetin, and Ibuprofen.
