change in electron density as two hydrogen atoms approach each other
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Change in electron density as two hydrogen atoms approach each other. Hybridization – mixing of two or more atomic orbitals to form a new set of hybrid orbitals. - PowerPoint PPT PresentationTRANSCRIPT
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Change in electron density as two hydrogen atoms approach each other.
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Hybridization – mixing of two or more atomic orbitals to form a new set of hybrid orbitals.
1. Mix at least 2 nonequivalent atomic orbitals (e.g. s and p). Hybrid orbitals have very different shape from original atomic orbitals.
2. Number of hybrid orbitals is equal to number of pure atomic orbitals used in the hybridization process.
3. Covalent bonds are formed by:
a. Overlap of hybrid orbitals with atomic orbitals
b. Overlap of hybrid orbitals with other hybrid orbitals
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Formation of sp Hybrid Orbitals
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Formation of sp2 Hybrid Orbitals
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# of Lone Pairs+
# of Bonded Atoms HybridizationExamples
2
3
4
5
6
sp
sp2
sp3
sp3d
sp3d2
BeCl2
BF3
CH4, NH3, H2O
PCl5
XeO4, SF6
How do I predict the hybridization of the central atom?
1. Draw Lewis structure2. Count the number of lone pairs AND the number
of atoms bonded to the central atom
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bond
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Sigma () and Pi Bonds ()
Single bond 1 sigma bond
Double bond 1 sigma bond and 1 pi bond
Triple bond 1 sigma bond and 2 pi bonds
How many and bonds are in the acetic acid(vinegar) molecule CH3COOH?
C
H
H
CH
O
O H bonds = 7
bonds = 1