The electron deficient compound that has 3c - 2e bond among the following:
A
B2H6
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B
Al2Cl6
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C
BeCl2 polymer
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D
All of the above
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Solution
The correct option is AB2H6
In B2H6, total number valence atomic orbitals = 14 (4 from each boron atom and one from each hydrogen atom) Total number of valence electrons = 12 So in order to utilise all the valence orbitals, B2H6 possess 3c-2e bonds. In Al2Cl6 and BeCl2 lone pairs are involved in bridge formation. Hence bridge bonds are 3c-4e bonds.