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In a regular covalent bond, the two nuclei of the two atoms attract one another. In a coordinate covalent bond, one of the atoms donates both electrons, making it a bit weaker than a regular covalent bond.
There is unequal sharing of electrons in coordinate covalent bonds. In a regular covalent bond, two atoms would be contributing one electron each, but in a coordinate covalent bond, one atom is contributing both electrons.
A coordinate covalent bond is special because both electrons in the shared lone pair came from the same atom. In a regular covalent bond, each atom in the bond provide an electron. I believe that the strength of a coordinate covalent bond is equivalent to any other covalent bond and its importance is that it allows us to minimize formal charge and more accurately depict the simplification of an atom in a Lewis Structure. Coordinate covalent bonds are essential in the formation of compounds and are thus essential in daily life.
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