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Dative covalent bonding is a type of chemical bond where one atom donates a pair of electrons to another atom. Here are some examples of dative covalent combinations:
1. Formation of ammonium ion (NH4+):
In this example, nitrogen donates its lone pair of electrons to hydrogen ions (H+), forming the ammonium ion. The nitrogen atom has a complete octet of electrons, while each hydrogen atom has a complete valence shell of two electrons.
2. Coordination complexes:
In coordination complexes, a metal ion (such as Fe2+, Co3+, etc.) accepts electrons from a ligand (which can be a molecule or an ion). The metal ion has an empty or incomplete d-orbital, which can accept electrons from the ligand, forming a coordinate bond.
3. Lewis acid-base adducts:
In Lewis acid-base reactions, a Lewis acid (which has an empty orbital) accepts electrons from a Lewis base (which has a lone pair of electrons). This results in the formation of a dative covalent bond between the acid and the base.
4. Oxonium ion (H3O+):
In this example, oxygen donates its lone pair of electrons to a hydrogen ion, forming the oxonium ion. The oxygen atom has a complete octet of electrons, while each hydrogen atom has a complete valence shell of two electrons.
These are just a few examples of dative covalent combinations. Dative covalent bonding is a common type of bonding in inorganic chemistry and plays a crucial role in the formation and properties of many chemical compounds.