Geometry Prediction. Ray A. Gross, Jr. Prince George’s Community College April 18, 2007. Nature of Bonding. Central Atom (CA) Ligands (L) Lone Pairs (LPCA). G. N. Lewis Linus Pauling. 1930. 1931. Water (H 2 O). Sulfuric Acid (H 2 SO 4 ). Note: L = # s bonds to CA .
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Ray A. Gross, Jr.
Prince George’s Community College
April 18, 2007
Note: L = # s bonds to CA.
HO = L+ LPCA
HO = L + LPCA= 2 + 2 = 4
HO = L + LPCA = 4 + 0 = 4
If we know the hybridization, we know HO.
If we know HO, we know the hybridization.
Sulfuric Acid Example
and Geometry by finding L and LPCA
LPCA = half the CA’s electrons leftover after bonding.
LPCA = ½(VE – ERL)
LPCA = ½(3 – 3) = 0
Each H requires one of CA’s electrons.
Each O requires two electrons; each OH requires one electron.
Available electrons, VEadj= VE adjusted for charge CH
Electrons Required by Ligands (ERL)
H and O as ligands