Question

Maximum bond angle is present in bf3 bbr3 three bcl3

Answer 1

Maximum bond angle is present in BBr₃

Br is the least electronegative from all of them. SO, in BBr₃ the electrons will be the closest towards Boron and thus due to electron-electron repulsions BBr₃ will have max bond angle. Also another reason for this will be steric hindrance due to large size of bromine

Answer 2

Answer:BF3<BCl3<BBr3<BI3

Explanation:

Luckily in this bond angle question there is no need of applying the concept of back bonding though back bonding is occurring in all of them due to deficiency of e- in boron and availability of ectra e- in halogens.

The max effect of backbonding is in BF3 bcoz here orbital difference is minimum i.e., 2p-2p while min effect of backbonding is in BI3 bcoz orbital difference is huge.

Now coming back to the question keeping jn mind backbonding is also there then structure of BX3 will be