1 Meetings 31, 32 –Chapter 9 Coordinate covalent bonds Example H3N: + BF3H3N-BF3The bonding pair comes completely from one of the reactants. Compounds with incomplete octets can complete them by bonding with another compound with a lone pair to spare. Sometimes written as H3N→BF3Lewis Acid, Lewis Base Lewis acid: electron pair acceptor. Lewis base: electron pair donor The bond formed is a coordinate covalent bond. In the reaction of NH3with BF3ammonia acts as a Lewis base and boron trifluoride acts as a Lewis acid.
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