Characteristics of Solids Bonding Electrons in Solids Band Theory Defects Semiconductor Classification of Solids There are several forms solid state materials can adapt

determine whether an application is possible No matter how good the electric, magnetic, chemical or other properties are, a material is of no use if it does not fulfill mechanical requirements hardness compressive & tensile strength

Allylic 1-3-Strain as a Controlling Element in Stereoselective Transformations TSO(2C)4 R. W. Hoffmann, Angew. Chem. Int. Ed. Engl. 2000, 39, 2054-2070 CH2)lOTs Conformation Design of Open-Chain Compounds

Acyclic Conformational Analysis-1 Ethane, Propane, Butane & Pentane Conformations Introduction to Allylic Strain Reading Assignment for week

Hyperconjugation and \Negative\ Hyperconjugation Anomeric and Related Effects An Introduction to Frontier Molecular Orbital Theory-1 Problem of the Day The molecule illustrated below can react through either Path A or Path B to form salt 1 or salt 2 . In both instances the carbonyl oxygen functions as the

Beak, P. (1992). “Determinations of transition-state geometries by the endocyclic restriction test: mechanisms of substitution at nonstereogenic atoms.” Acc. Chem. Res. 25: 215. The Primary Literature

Stereoelectronic Effects-1 Anomeric and Related Effects Electrophilic & Nucleophilic Substitution Reactions The SN2 Reaction: Stereoelectronic Effects Olefin Epoxidation: Stereoelectronic Effects Baeyer-Villiger Reaction: Stereoelectronic Effects Olefin Bromination: Stereoelectronic Effects

Dart Epoxides as Electrophiles Chem 206 Parker, R. E.; Isaacs, N. C. Chem. Rev. 1959, 59, 737-799. Rosowsky, A. In The Chemistry of Heterocyclic Compounds;

Prelog Strain: van der Waals interactions Baeyer Strain: bond angle distortion away from the ideal Pitzer Strain: torsional rotation about a sigma bond Baeyer Strain for selected ring sizes size of ring Ht of Combustion

Advanced Organic Chemistry Handout-09A Synthetic Mechanistic Overview of Electrophilic Halogenation andy ratz Evans group seminar, May 7, 1992 Matthew d. shair