CHEM 110 Lecture Notes - Fluorine, Covalent Bond, Benzene

• School: McGill University
• Department: Chemistry
• Course: CHEM 110
• Professor: Ariel Fenster

Document Summary

Paramagnetic species: unpaired electrons, attracted to a magnetic field. Diamagnetic species: paired electrons, slightly repelled by a magnetic field. Bonding and geometry (no magnetism) bonding, geometry, magnetism. Valence bond theory: electrons in atomic orbitals, electrons remain in atomic. Molecular orbital theory: electrons in atomic orbitals, electron in molecular orbitals orbitals. Hund"s rule and pauli"s exclusion principle available molecular orbitals obeying hund"s rule and pauli"s exclusion principle. Theory to diatomic molecules: molecules that only contain two atoms (i. e. h2, o2 and n2) Example: h2: derive a set of molecular orbitals. Take the wave functions of one orbital and add it to the wave function of the other orbital (and vice versa with subtraction; antibonding) 10/25/2011 6atomic theory1. derive a set of atomic orbitals2. arrange the atomic orbitals in orderofincreasingenergyorder of increasing energy3. distribute the electrons among the available atomic orbitals obeying hund"s rule and pauli"s exclusion principlem. o.