Question

Which of the following molecule has 3C - $4e^{-}$ bond?

• A. $A{l}_{2}C{l}_6$
• B. $B{e}_{2}C{l}_4$
• C. $I_{2}C{l}_6$
• D. All are having 3C - $4e^{-}$ bond

Answer 1

The correct option is D All are having 3C - $4e^{-}$ bond

Let us assess the options in a piecemeal manner:

Each of the bridging chlorine atoms together with the 2 aluminium atoms constitute a
3center - 4electron bond. This is true for the other two compounds as well:

The dimer of $BeC{l}_2$ also has a 3c-4e bond. As is the case with $I_{2}C{l}_6$: