Find the number of species in which 3 c − 2 e − type of bond are present:- Be 2 H 4 , B 2 H 6 , Al 2 (CH 3 ) 6 , Be 2 Cl 4 , Al 2 Cl 6 , Ga 2 Cl 6

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TestHub · Accepted Answer

Be₂H₄ and B₂H₆ have bridging H atoms forming 3c–2e bonds (Be–H–Be, B–H–B).
Be₂Cl₄ also has bridging Cl atoms showing similar 3c–2e bonding.
Al₂(CH₃)₆ has bridging via CH₃ groups but not typical 3c–2e bonding.
Al₂Cl₆ and Ga₂Cl₆ involve coordinate (dative) bonding, not pure 3c–2e type.
Hence only Be₂H₄, B₂H₆, Be₂Cl₄ are counted.

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