devarshi-dt-logo

Question:

Hydride of boron occurs as B2H6 but B2Cl6 does not exist. This is because:

boron and hydrogen have almost equal values of electronegativity

pπ−dπ back bonding is possible in B2H6 but not in B2Cl6

boron and chloride have almost equal atomic sizes

small hydrogen atoms can easily fit in between boron atoms but large chlorine atoms do not.

Solution:

Hydride of boron occurs as B2H6 but B2Cl6 does not exist. This is because small hydrogen atoms can easily fit in between boron atoms but large chlorine atoms do not.