Which molecules react to form a dative covalent (coordinate) bond?0/1A. CH4 and NH3B. C2H2 and Cl2C. NH3 and HFD. Cl2 and HF
Question
Which molecules react to form a dative covalent (coordinate) bond?
0/1
A. CH4 and NH3
B. C2H2 and Cl2
C. NH3 and HF
D. Cl2 and HF
Solution
The formation of a dative covalent (coordinate) bond involves a molecule with a lone pair of electrons and another molecule or ion that can accept those electrons.
A. CH4 and NH3: Neither of these molecules has an empty orbital to accept a pair of electrons, so they cannot form a dative bond.
B. C2H2 and Cl2: Neither of these molecules has an empty orbital to accept a pair of electrons, so they cannot form a dative bond.
C. NH3 and HF: NH3 has a lone pair of electrons and HF has an empty orbital (the hydrogen atom can accept a pair of electrons), so they can form a dative bond.
D. Cl2 and HF: Neither of these molecules has an empty orbital to accept a pair of electrons, so they cannot form a dative bond.
So, the correct answer is C. NH3 and HF.
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