Trigonal Bipyramidal Electronic Geometry: AB 5 , AB 4 U, AB 3 U2, and AB 2 U 3
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1 Trigonal Bipyramidal Electronic Geometry: AB 5 , AB 4 U, AB 3 U2, and AB 2 U 3 If lone pairs are incorporated into the trigonal bipyramidal structure, there are three possible new shapes. 1. One lone pair - Seesaw shape 2. Two lone pairs - T-shape 3. Three lone pairs – linear The lone pairs occupy equatorial positions because they are 120 o from two bonding pairs and 90 o from the other two bonding pairs. Results in decreased repulsions compared to lone pair in axial position.
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Trigonal Bipyramidal Electronic Geometry: AB 5 , AB 4 U, AB 3 U2, and AB 2 U 3. If lone pairs are incorporated into the trigonal bipyramidal structure, there are three possible new shapes. One lone pair - Seesaw shape Two lone pairs - T-shape Three lone pairs – linear - PowerPoint PPT Presentation
Transcript of Trigonal Bipyramidal Electronic Geometry: AB 5 , AB 4 U, AB 3 U2, and AB 2 U 3
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Trigonal Bipyramidal Electronic Geometry: AB5, AB4U, AB3U2, and
AB2U3
If lone pairs are incorporated into the trigonal bipyramidal structure, there are three possible new shapes.
1. One lone pair - Seesaw shape2. Two lone pairs - T-shape3. Three lone pairs – linear
The lone pairs occupy equatorial positions because they are 120o from two bonding pairs and 90o from the other two bonding pairs.
Results in decreased repulsions compared to lone pair in axial position.
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Trigonal Bipyramidal Electronic Geometry: AB5, AB4U, AB3U2, and
AB2U3
AB4U molecules have:
1. Trigonal bipyramid electronic geometry
2. Seesaw shaped molecular geometry
3. and are polar
One example of an AB4U molecule is SF4
Hybridization of S atom is sp3d.
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Lewis Dot
H
C
HHH
Seesaw
Molecular Geometry
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Trigonal Bipyramidal Electronic Geometry: AB5, AB4U, AB3U2, and
AB2U3
AB3U2 molecules have:
1. Trigonal bipyramid electronic geometry
2. T-shaped molecular geometry
3. and are polar One example of an AB3U2 molecule is
IF3
Hybridization of I atom is sp3d.
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Trigonal Bipyramidal Electronic Geometry: AB5, AB4U, AB3U2, and
AB2U3
Molecular Geometry
H
C
HHH
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Trigonal Bipyramidal Electronic Geometry: AB5, AB4U, AB3U2, and
AB2U3
AB2U3 molecules have:
1. Trigonal bipyramid electronic geometry
2. Linear molecular geometry
3. and are nonpolar One example of an AB3U2 molecule is XeF2
Hybridization of Xe atom is sp3d.
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Trigonal Bipyramidal Electronic Geometry: AB5, AB4U, AB3U2, and
AB2U3
Molecular Geometry
H
C
HHH
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Octahedral Electronic Geometry: AB6, AB5U, and AB4U2
Some examples of molecules with this geometry are: SF6, SeF6, SCl6, etc.
These molecules are examples of central atoms with six bonding pairs of electrons.
Molecules are octahedraloctahedral and nonpolarnonpolar when all six substituents are the same.If the six substituents are not the same polar polar
molecules can result, SF5Cl is an example.
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Nonpolar
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Octahedral Electronic Geometry: AB6, AB5U, and AB4U2
If lone pairs are incorporated into the octahedral structure, there are two possible new shapes.
1. One lone pair - square pyramidal
2. Two lone pairs - square planar The lone pairs occupy axial positions because
they are 90o from four bonding pairs. Results in decreased repulsions compared to lone
pairs in equatorial positions.
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Octahedral Electronic Geometry: AB6, AB5U, and AB4U2
AB5U molecules have:
1. Octahedral electronic geometry
2. Square pyramidal molecular geometry
3. and are polar. One example of an AB4U molecule is IF5
Hybridization of the iodide atom is sp3d2.
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Octahedral Electronic Geometry: AB6, AB5U, and AB4U2
Molecular Geometry
H
C
HHH
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Octahedral Electronic Geometry: AB6, AB5U, and AB4U2
AB4U2 molecules have:
1. octahedral electronic geometry
2. square planar molecular geometry
3. and are nonpolar. One example of an AB4U2 molecule is XeF4
Hybridization of Xe atom is sp3d2.
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Octahedral Electronic Geometry: AB6, AB5U, and AB4U2
Molecular Geometry Polarity
H
C
HHH
Nonpolar
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Regions of high electron density = 4
Regions of high electron density = 5
Regions of high electron density = 6
Tetrahedral Trigonal Bipyramidal
Octahedral
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![6. P-Block Elements...halides are trigonal bipyramidal with sp3d hybridization. *3. How does PCl 5 reacts with the following? a) Water b)C 2H 5OH c)CH 3COOH d) Ag Ans. a. 52 34 [A]](https://static.fdocuments.us/doc/165x107/5e7de1ccdaa8be0c88798757/6-p-block-elements-halides-are-trigonal-bipyramidal-with-sp3d-hybridization.jpg)
