Verified Solution • 2025–26 Session
moderate
QAIPMT-2010-Ch-2030: NEET 2010 Chemistry - Class 12 AIPMT-2010-Ch-2030 Solution: The existence of two different coloured complexes with the…
The existence of two different coloured complexes with the composition of is due to linkage isomerism geometrical isomerism coordination isomerism ionization isomerism.
Multiple Choice Options
- A BCl 3 > BF 3 > BBr 3
- B BBr 3 > BCl 3 > BF 3
- C BBr 3 > BF 3 > BCl 3
- D BF 3 > BCl 3 > BBr 3
Step-by-Step Verified Solution
In BF 3 , p-p overlap between B and F is
maximum due to identical size and energy of
p-orbitals, so electron deficiency in boron of BF 3
is neutralized partially to the maximum extent by
back donation. Also, the tendency to back
donate decreases from F to I. So the order will
be:
BBr 3 > BCl 3 > BF 3