Molecular bromine (Br2) on reaction with 3 moles of molecular fluorine (F2), it will produced 2 moles of BrF3. BrF3 is interhalogen compound i.e. trifluorobromide. Br2(g)+3F2(9)→
2BrF3(9)
Trifluoro−bromide
BrF3=
7e−+3e−
2
=
10
2
e−=5e−i.e. sp3d hybridisation. BrF3 contain 3‌Br−F−covalent bonds and 2 lone pairs. BrF3 is sp3d hybridised molecule having T-shape.
Hence, total number of lone pairs at central halogen atom is 2 .