20071005 Day Lecture 13

20071005 Day Lecture 13 - Welcome to CHM 1220/1225 Its time...

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1 Welcome to CHM 1220/1225 It’s time to start……. Thank you! Dr. Zibuck Today’s Plan Announcements Complete Chapter 10 Begin Chapter 5 • Pre-lecture Assignment 13 will be available at 2:00 p.m. today and is due by noon, Monday, October 8, 2007. • Chapter 5 Quiz is due by noon, Friday, October 12, 2007. • Chapter 5 Homework is due by 12:50 p.m. Friday, October 12, 2007 Chapter 10 Molecular Geometry and Chemical Bonding Theory Molecular Geometry and Chemical Bonding Theory Molecular Geometry and Directional Bonding 1. The Valence-Shell Electron-Pair Repulsion (VSEPR) Model 2. Dipole Moment and Molecular Geometry 3. Valence Bond Theory 4. Description of Multiple Bonding Molecular Orbital Theory 5. Principles of Molecular Orbital Theory 6. Electron Configurations of Diatomic Molecules of the Second Period 7. Molecular Orbitals and Delocalized Bonding
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2 ? Give the orbital diagram and electron configuration of the F 2 molecule. Is the molecular substance diamagnetic or paramagnetic? What is the order of the bond in F 2 ? F 2 has 18 electrons. The KK shell holds 4, leaving 14. The molecular electron configuration is KK ( σ 2s ) 2 ( σ∗ 2s ) 2 ( σ 2p )2 ( π 2p ) 4 ( π * 2p ) 4 . The bond order is ½ (8-6) = 1 The molecule is diamagnetic. s 2 σ σ s 2 p 2 σ σ p 2 π p 2 p 2 π ? A number of compounds of the nitrosonium ion, NO + , are know,m including nitrosonium hydrogen sulfate, (NO + )(HSO 4 - ). Use the molecular orbitals similar to those of homonuclear diatomic molecules and obtain the orbital diagram, electron configuration, bond order, and magnetic characteristics of the NO + ion. (Note that the stability of the ion results from the loss of an antibonding electron from NO.) NO + has 14 electrons. The KK shell holds 4, 10 remain. The molecular electron configuration is KK ( σ 2s ) 2 ( σ∗ 2s ) 2 ( σ 2p ) 2 ( π 2p ) 4 . The bond order is
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This note was uploaded on 02/02/2010 for the course CHM 1220 taught by Professor Barber during the Spring '07 term at Wayne State University.

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20071005 Day Lecture 13 - Welcome to CHM 1220/1225 Its time...

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