30 terms

[CHEM111] Ch10: VSEPR theory (EG=electron geometry, MG=molecular geometry)

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Terms in this set (...)

Linear EG # of Bonding Pairs
2
Linear EG # of lone pairs on central atom
0
Linear EG ideal bond angle
180 deg
Trigonal Planar EG # of bonding pairs
3
Trigonal Planar EG # of lone pairs on central atom
0
Trigonal Planar EG ideal bond angle
120 deg
Bent EG # of bonding pairs
2
Bent EG # of lone pairs on central atom
1 or 2
Bent EG ideal bond angle
120 deg
Tetrahedral EG # of bonding electron pairs
4
Tetrahedral EG # of lone pairs on central atom
0 or 1 or 2
Tetrahedral EG ideal bond angle
109.5 deg
Trigonal pyramidal EG # of bonding pairs
5
Trigonal pyramidal EG # of lone pairs on central atom
1
When do you deviate from the ideal bond angle?
If you have lone pairs on the central atom.
hybridization
the mixing of an atom's orbitals to form the same total number of equivalent hybrid orbitals
AB2 corresponds to which electron geometry
linear
AB3 corresponds to corresponds to which electron geometry
trigonal planar
AB2E1 corresponds to corresponds to which electron geometry
trigonal planar
AB2E1 corresponds to corresponds to which molecular geometry
bent
AB3E1 corresponds to corresponds to which electron geometry
tetrahedral
AB3E1 corresponds to corresponds to which molecular geometry
trigonal pyramidal
For which types of molecular geometries (where lone pairs on the central atom are not shown) will there always be NO lone pairs for the electron geometry (do up to AB5 electron geometry aka steric number 5)?
Linear, Tetrahedral, Trigonal Planar, Trigonal Bypramidal
For which types of molecular geometries (where lone pairs on the central atom are not shown) will there always BE 1 OR MORE lone pairs for the electron geometry (do up to AB5 electron geometry aka steric number 5)?
Bent (sometimes called "V-Shape" for 1 lone pair on central atom), Trigonal Pyramidal, ("Double Bent" for things like H2O but we call it bent), Seesaw, T-Shaped, Linear (yes, it's possible with 3 lone pairs on central atom!)
If the steric number (# of electron groups/domains or # of lone pairs on central atom + # of bonding pairs on central atom) is 2, the hybridization is...
sp
If the steric number (# of electron groups/domains or # of lone pairs on central atom + # of bonding pairs on central atom) is 3, the hybridization is...
sp^2
If the steric number (# of electron groups/domains or # of lone pairs on central atom + # of bonding pairs on central atom) is 4, the hybridization is...
sp^3
If the steric number (# of electron groups/domains or # of lone pairs on central atom + # of bonding pairs on central atom) is 5, the hybridization is...
sp^3d
If the steric number (# of electron groups/domains or # of lone pairs on central atom + # of bonding pairs on central atom) is 6, the hybridization is...
sp^3d^2
steric number
number of atoms bonded to central atom + number of lone pairs on central atom