Which of the following molecules have correct indicated overlapping?

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Molecule	Overlapping in the bridge bond (if any)
${Si}_{2} {Cl}_{6}$	$s p^{3} - p - s p^{3}$

Molecule	Overlapping in the bridge bond (if any)
${Be}_{2} H_{4}$	$s p^{2} - s - s p^{2}$

Molecule	Overlapping in the bridge bond (if any)
${Si}_{2} H_{6}$	$s p^{3} - s - s p^{3}$

Molecule	Overlapping in the bridge bond (if any)
$B_{2} H_{6}$	$s p^{3} - s - s p^{3}$

answer is B, D.

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Detailed Solution

$S i_{2} C l_{6}$ and $S i_{2} H_{6}$ do not have bridge bond.

The molecular orbital hypothesis provides the best explanation for how bridge bonds form. According to this theory, a bridge bond is created by packing electrons into a molecular orbital that spans three nuclei, giving these bonds their name of "three-centered bond."

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