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I don't really understand the concept behind a coordinate covalent bond. Professor Lavelle skimmed through it during my lecture. Could someone explain this concept to a greater extent and apply it through an example? Thank you!
A coordinate covalent bond is a bond in which both electrons come from one of the atoms. For example, when boron trifluoride reacts with ammonia, the lone pair on ammonia completes boron's octet. Both electrons needed to complete boron's octet come from ammonia, rather than some coming from boron and some from ammonia, therefore making it a coordinate covalent bond.
Coordinate covalent bonds are bonds in which the electrons being shared come from the same atom. In a typical covalent bond, such as the bond between two H atoms, each atom provides one electron that both of the atoms can share to fill their 1s shells. In a coordinate covalent bond, such as the bond between ammonia and H+, the nitrogen in ammonia has two lone pair electrons that are shared with the electron-less H+. In this bond, H+ provides none of the electrons while N provides two for the bond.
A coordinate covalent bond is a type of covalent bond where the two bonding electrons come from the same atom. In a regular covalent bond, each of the atoms that are forming the bond donate an electron to form the bond.
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