Among [BeCl_(2)]_(n), [BeH_(2)]_(n), B_(2)H_(6), Al_(2)(CH_(3))_(6), Al_(2)Cl_(6), Be(BH_(4))_(2), Al(BH_(4))_(3), the number of compounds having 3c-2e bonds are :

Among [BeCl_(2)]_(n), [BeH_(2)]_(n), B_(2)H_(6), Al_(2)(CH_(3))_(6),

1.	Among [BeCl_(2)]_(n), [BeH_(2)]_(n), B_(2)H_(6), Al_(2)(CH_(3))_(6), Al_(2)Cl_(6), Be(BH_(4))_(2), Al(BH_(4))_(3), the number of compounds having 3c-2e bonds are :
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