Ch 9+10 (MO And VB Theory) Flashcards
Hybrid of steric number =3
Sp^2
Hybrid of steric number =4
Sp^3
Hybrid of steric number =5
sp^3d
Hybrid of steric number =6
sp^3d^2
Steric number =
of bonded atoms + # of lone pairs
Ideal bond angle for linear geo
180
Ideal bond angle for trigonal planar
120
Ideal bond angle for bent(2 bonded, 1 lone pair)
Ideal bond angle for tetrahedral
109.5
Ideal bond angle for trigonal pyramid
109.5
Idea bond angle for (2 bonded, 2 lps)
109.5
Ideal bond angle for trigonal bipyramidal
90,120,180
Ideal bond angle for seesaw
90,120,180
Ideal bond angle for t shaped
90,180
Ideal bond angle for octahedral
90,180
Ideal bond angle for square pyramidal
90,180
Ideal bond angle for square planar
90,180
3-D drawings wedges=
Outwards
3-D drawings solid line
Same plane
3-D drawings dotted line
Into page
Bond order =
1/2(#bonding electrons - anti bonding electrons)
O,F,Ne molecular orbital is more stable
Sigma 2p is stable; so lower energy
B,C,N molecular orbital more stable?
Pi 2p is more stable; so it’s lower energy
Molecular orbital configuration for B,C,N
(Sigma2s)(sigma star 2s)(pi2p)(sigma 2p)(pi star 2p)(sigma star 2p)
Molecular orbital configuration for O,F,Ne
(Sigma 2s)(sigma star 2s)(sigma 2p)(pi 2p)(pi star 2p)(sigma star 2p)
If lighter element and heavier element in a compound than the MO diagram is
Based on heavier element; (sigma 2p)(pi 2p)
Atomic orbitals shifts down for …
More electronegative element
Sigma carries ______ electrons
2
Pi carries _____ electrons
4
Hybrid of steric number =2
Sp
