What characteristics do you expect from an electron deficient hydride with respect to its structure and chemical reaction?

What characteristics do you expect from an electron deficient hydride

1.	What characteristics do you expect from an electron deficient hydride with respect to its structure and chemical reaction?
Answer» Solution :It is EXPECTED to be a Lewis acid. For example, DIBORANE `B_(2)H_(6) (DIMER of BH_(3))` forms a complex with LIH which gives `H^(-)` ion (Lewis base) `underset("LITHIUM hydride")(2LiH)+`underset("Diborane")(B_(2)H_(6)) to `underset("Lithium borohydride")(2Li^(+)[BH_(4)]^(-))` Similarly, it also combines with trimethuylamine (organinc compound) and carbon monoxide which act as Lewis base to form addition compound. `B_(2)H_(6)+underset("Trimethylamine")((CH_(3))_(3)) ddot(N) to underset("Addition compound")(2H_(3)B) leftarrow N(CH_(3))_(3)` `B_(2)H_(6)+CO to underset("Addition compound")((2H_(3)B) leftarrow CO`