Slide 15 summary the three molecular geometries for a

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Slide 15 Summary The Three Molecular Geometries for a Tetrahedral EPG (i.e. SN = 4) Examples: CH 4 , SiCl 4 , SO 4 2- ClO 4 - Examples: NH 3 , PF 3 , ClO 3 - , H 2 O + Examples: H 2 O, OF 2 , SCl 2 NBA = 4 Tetrahedral MG NBA = 3 Trigonal Pyram. MG NBA = 2 Bent MG
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Slide 16 VSEPR: SN = 5 NBA = 5 NLP = 0 SN = 5 The 5 electron pairs about the Phosphorus repel each other and try to get as far apart as possible. This results in: P Cl Cl Cl Cl Cl EPG = Trigonal Bipyramidal
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Slide 17 VSEPR: SN = 5 NBA = 5 NLP = 0 SN = 5 EPG = Trigonal Bipyramidal axial equatorial Angles are 120 o (Cl-P-Cl) and 90 o (Cl-P-Cl) Because there are no lone pair electrons, MG = EPG = Trigonal Bipyramidal Text: AX 5 E 0 P Cl Cl Cl Cl Cl P Cl Cl Cl Cl Cl
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Slide 18 Other Molecules with SN = 5 SF 4 ClF 3 XeF 2
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Slide 19 Summary The Four Molecular Geometries for a Trigonal Bipyramidal EPG (i.e. SN = 5) Examples: PF 5 , AsF 5 , SOF 4 Examples: SF 4 , XeO 2 F 2 , IF 4 - , IO 2 F 2 - Examples: ClF 3 , BrF 3 NBA = 5 Trigonal Bipyramidal MG NBA = 4 SeeSaw MG NBA = 3 T-Shaped MG Examples: XeF 2 , I 3 - , IF 2 - NBA = 2 Linear MG
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Slide 20 VSEPR: SN = 6 NBA = 6 NLP = 0 SN = 6 The 6 electron pairs about the Sulfur repel each other and try to get as far apart as possible. This results in: S F F F F F F EPG = Octahedral
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Slide 21 VSEPR: SN = 6 NBA = 6 NLP = 0 SN = 6 Angles are 90 o All 6 positions are equivalent Because there are no lone pair electrons, MG = EPG = Octahedral EPG = Octahedral S F F F F F F S F F F F F F
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Slide 22 Other Molecules with SN = 6 BrF 5 XeF 4 XeF 3 -
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Slide 23 Summary The Four Molecular Geometries for an Octahedral EPG (i.e. SN = 6) Examples: SF 6 , IOF 5 , Examples: BrF 5 , TeF 6 - , XeOF 4 Examples: XeF 4 , ICl 4 - NBA = 6 Octahedral MG NBA = 5 Square Pyramidal MG NBA = 4 Square Planar MG
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Slide 24 A Note on Bond Angles The bond angles which we have been assigning (e.g. 109.5
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