Which of the following chemical species contain at least one multi-center, electron-deficient "banan — Chemical Bonding Chemistry Question

💡 Solution & Explanation

$B_2H_6$ and solid polymeric $BeH_2$ are classical electron-deficient hydrides that utilize 3-center-2-electron bonds to bridge the metal atoms. In contrast, $Al_2Cl_6$ and polymeric $BeCl_2$ bridge via coordinate bonds utilizing the lone pairs of the halogen atoms (forming normal 2e bonds).