Question

# In which of the following adduct is formed most easily?  (SiH3)2O+BBr3(CH3)2O+BF3(SiH3)2O+BF3(CH3)2O+BBr3

Solution

## The correct option is D (CH3)2O+BBr3(CH3)2O+BBr3 No back bonding in both (CH3)2O and BBr3. Hence adduct formation is most easy. Back bonding reduces both acidic as well as basic character and hence reduces the possibility of adduct formation.

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