CHEM266 Chapter 3: Top Hat Chapter 3 Notes
31 Oct 2016
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Substitutions: atom or group of atoms replaced by another atom of group of atoms. Elimination reactions: single reactant splits into two products, gives method of preparing compounds with double or triple bonds. Addition reactions: two reactants add together to form a single new product. Rearrangement reactions: single reactant undergoes reorganization to yield an isomer of the original reactant. Reaction mechanism = how a reaction occurs, the steps involved: determined by design experiments, propose detailed mechanisms, and test proposed mechanisms. Bond formation is exothermic: asymmetrical bond formation is heterogenic bond formation, homogenic bond formation is symmetrical bond formation. Symbolized as dh , measured under standard conditions (1 atm, 25 c) Defined as change in enthalpy ( h ) for the process to the right. Total change in bond energy, or enthalpy ( h ) for a reaction can be calculated from bde by looking at the energies of broken and formed bonds, called heat of reaction.
