Nonpolar molecules

Diagram showing the net effect of symmetrical polar bonds  within boron trifluoride cancelling out to give a net polarity of zero. δ- shows an increase in negative charge and δ+ shows an increase in positive charge. There are two possibilities a molecule may be nonpolar:

●    there is almost no polarity in the bonds ( happens when there’s an equal sharing of electrons
between two different atoms);

●    the symmetrical arrangement of polar bonds.

Household nonpolar compounds examples include oil, fats and gasoline. (CARBURANT) Thus, most nonpolar molecules are water-insoluble (hydrophobic) at room temperature. However, many nonpolar organic solvents, such as turpentine, are able to dissolve polar substances. If  a polar and nonpolar molecule with similar molar masses are compared, in most of the cases, the polar molecule has a higher boiling point, because of the dipoles interaction between their molecules.

The most common form of such an interaction is the hydrogen bond, which is also known as the H-bond. There are a few examples such as:

●    In the methane molecule (CH4) the four C–H bonds are arranged tetrahedrally around the
carbon atom. Each bond has polarity (though not very strong).

●    The oxygen molecule (O2) does not have polarity in the covalent bond because of equal
electronegativity, hence there is no polarity in the molecule.

Back!

[Total: 0    Average: 0/5]
Toate materialele de pe acest site apartin Gko Cryosonics SRL, sunt protejate de Legea Drepturilor de Autor si pot fi reproduse numai cu acordul explicit al autorului. Incalcarea drepturilor de proprietate intelectuala se pedepseste conform Codului Penal