User:Benjah-bmm27/degree/2/AJM

=Hückel, AJM= Understanding Structure and Reactivity, Part 2
 * The course looks at carbon 2p orbitals and the π bonds they can form, especially in conjugated systems such as polyenes
 * Secular equations &mdash; see Quantum Concepts lectures by FRM's predecessor Professor Balint-Kurti: GGBK lecture 6
 * Hückel method
 * the circle method
 * Hückel's rule: aromaticity and antiaromaticity
 * Pericyclic reactions: ChemTube3D - Jmol animations of pericyclic reactions
 * Woodward–Hoffmann rules: a set of rules for predicting the stereochemistry of pericyclic reactions based on orbital symmetry
 * Cycloadditions
 * Diels-Alder reaction
 * Electrocyclic reactions

Typical molecules studied in the course

 * ethylene, C2H4
 * 1,3-butadiene, C4H6
 * benzene, C6H6
 * cyclopropenyl radical, [C3H3]•
 * cyclopentadienyl anion, [C5H5]−
 * trimethylenemethane,
 * this is a non-Kekulé molecule that came up in the 2009 exam
 * it's a diradical with a triplet ground state, but can 'rearrange' to methylenecyclopropane via an excited singlet state
 * cyclopropenyl cation, [C3H3]+
 * cyclobutadiene, C4H4