shapes of many compounds due hybridisation

shapes of many compounds due hyberdisation

1.shape of BF3 (boron trifluoride)

Ground state
 B
(5)    1s^2  2s^2  2px^1  2py^0 2pz^0

excited state

    1s^2  2s^1  2px^1  2py^1  2pz^0
                { sp2 hybridisation}
since sp2 hybridisation takes place. so BF3 molecule triangular with bond angle 120°

triangular or trigonal planer

2.shape of CH4 (Methane)

Ground state
 C
(5)    1s^2  2s^2  2px^1  2py^1 2pz^0

excited state

    1s^2  2s^1  2px^1  2py^1  2pz^1
                { sp3  hybridisation}
since sp3 hybridisation takes place. so CH4 molecule tetrahedral with bond angle 109°.28'

3. shape of PF5 (phosphorus pentafluorine)

Ground state
 P
(15)    3s^2  3px^1  3py^1 3pz^1 3d^0

excited state

          3s^2  3px^1  3py^1  3pz^1  3d^1
                      { sp3d hybridisation}
since sp3d hybridisation takes place. so PF5 molecule is tringonal bipyramidal.

equitorial 120°
axial 90°
axial bond are slightly larger than equatorial bond because axial bond forces greater repulsion than equitorial. so PF5 is quite reactive.

6.shape of SF6 (sulphur hexafluoride)

Ground state
 S
(16)   3s^2  3px^2  3py^1 3pz^1 3d^0

excited state

          3s^2  3px^1  3py^1  3pz^1  3d^2
                      { sp3d2 hybridisation}
since sp3d hybridisation takes place. so SF6 molecule is Octahedral with  all bond angle 90°.

so SF6 is no reactive