Molecular Orbitals In Chemical Bonding英文电子书.pdf

Molecular Orbitals in 9 Chemical Bonding OUTLINE 9-1 Molecular Orbitals 9-5 Heteronuclear Diatomic 9-2 Molecular Orbital Energy Level Molecules Diagrams 9-6 Delocalization and the Shapes of 9-3 Bond Order and Bond Stability Molecular Orbitals 9-4 Homonuclear Diatomic Molecules OBJECTIVES After you have finished studying this chapter, you should be able to A computer representation of one of • Describe the basic concepts of molecular orbital theory the molecular orbitals of benzene. • Relate the shapes and overlap of atomic orbitals to the shapes and energies of the resulting molecular orbitals • Distinguish among bonding, antibonding, and nonbonding orbitals • Apply the Aufbau Principle to find molecular orbital descriptions for homonuclear diatomic molecules and ions • Apply the Aufbau Principle to find molecular orbital descriptions for heteronuclear diatomic molecules and ions with small (EN) values • Find the bond order in diatomic molecules and ions • Relate bond order to bond stability • Use the MO concept of delocalization for molecules in which valence bond theory would postulate resonance e have described bonding and molecular geometry in terms of valence bond W theory. In valence bond theory, we postulate that bonds result from the W sharing of electrons in overlapping orbitals of different atoms. These orbitals may be pure a