Question

normal modes of vibraration of BrF5

Answer 1

number of modes in linear= 3n-5

number of modes in non-linear= 3n-6

where n= no. of e's{electrons}


BrF5 has 4 F's in square& 2 {i.e., lone pair& F} in axial

each F has 6 e' so we find both & sum them{since its a complex}

Linear= 3(4*6)-5= 3(24)-5= 72-5= 67

Non-Linear= 3(2+6)-6= 24-6= 18

Number of modes of vibration BrF5= 67+18= 85