L1 /
17
CH1012
O 2s22p4
N 2s22p3
S-P ORBITAL MIXING
• No s-p mixing (E 2s << E2p)
If there are some filled 2p orbitals eg. O,F,Ne
DE 2s-2p is large, no-mixing of s & p orbitals
DE 2s-2p is large, no-mixing of s & p orbitals
1. Es1s < Es2s
2. Es2s < Es2s*
3. Es2px < Ep2pz, y
s-p Mixing (E 2s ó E2p)
Only 1/2 filled 2p
orbitals eg. B,C,N
DE 2s - 2p is small, mixing of the s character
AOs occurs, that is 2s and 2px
AOs occurs, that is 2s and 2px
1. Es2s decreases due to
mixing 2s+2px
2. Es2px raises due to
mixing
s2s
s*2s
