CH 301 Ch13 VSEPR examples 1_4 answers v2

CH 301 Ch13 VSEPR examples 1_4 answers v2 - Boron...

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Unformatted text preview: Boron Trichloride, BCl 3 Valence e = 3 + (3x7) = 24 B Cl Cl Cl RHED = 3TRIGONAL PLANAR POLAR covalent bonds; NON POLARmolecule 120° 1 2 ° 1 2 ° RHED = 3 TRIGONAL PLANAR No TRIGONAL PLANAR Electronic geometry = lone pairs on B Molecular geometry = NON POLAR POLAR molecule 120 ° 1 2 ° 1 2 ° Methane , CH 4 Valence e = 4 + (4x1) = 8 C H H H H RHED = Very slightly POLAR covalent bonds; NON POLARmolecule C H H H H REDRAW!! ALL ANGLES 4 TETRAHEDRAL No TETRAHEDRAL Electronic geometry = lone pairs on C Molecular geometry = NON POLAR Slightly POLAR molecule 109.5 ° Ammonia , NH 3 Valence e = 5 + (3x1) = 8 POLAR covalent bonds; due to lone pair, POLARmolecule N H H H N H H H REDRAW!! lone pair needs more room: ALL HNH ANGLES 09.5 ° RHED = 4 TETRAHEDRAL TRIGONAL PYRAMIDAL Electronic geometry = Molecular geometry = POLAR POLAR molecule <109.5 ° One lone pair on N Due to lone pair, Freon 12 , CCl 2 F 2 Valence e = 4 + (4x7) = 32 POLAR covalent bonds; dipoles do not cancel: POLAR molecule C Cl Cl F F REDRAW!! C Cl F F Cl POLAR POLAR molecule dipoles do not cancel: 4 RHED: tetrahedral electronic and molecular geometry all 109.5 A series of related molecules –which are polar?A series of related molecules –which are polar?...
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This note was uploaded on 04/03/2011 for the course CHEMISTRY 301 taught by Professor Mccord during the Spring '10 term at University of Texas.

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CH 301 Ch13 VSEPR examples 1_4 answers v2 - Boron...

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