Organic Reactions. Kinds of Reactions Mechanisms (polar, non-polar) Bond Dissociation Energy Reaction Profiles. Types of Reactions. Addition Reactions Elimination Reactions. Types of Reactions. Substitution: Polar Non-polar. Rearrangement. Definitions.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Organic Reactions Kinds of Reactions Mechanisms (polar, non-polar) Bond Dissociation Energy Reaction Profiles
Types of Reactions • Addition Reactions • Elimination Reactions
Types of Reactions • Substitution: • Polar • Non-polar
Definitions • Mechanism: Complete step-by-step of exactly which bonds break and which bonds form and in what order. • Thermodynamics: The study of the energy changes that occur in chemical transformations. This allows for comparison of stability of reactants and products. • Kinetics: The study of reaction rates, determining which products are formed most rapidly. One can predict how the rate will change with changing conditions.
Experimental Evidence Helps to Determine Mechanism • Chlorination does not occur at room temperature in the dark. • The most effective wavelength of light is blue that is strongly absorbed by Cl2 gas. • The light-initiated reaction has a high quantum yield (many molecules of product are formed from each photon of light).
Free Radical Species are Constantly Generated Throughout the ReactionPropagation
Enthalpy of Reaction (DHo) Measures Difference in Strength of Bonds Broken and Bonds FormedBond Dissociation Energy
Tertiary H’s removed 5.5 times more readily than primary H’s in chlorination reactions
Consider the free radical monochlorination of 2,2,5-trimethylhexane. Draw all of the unique products (ignore stereoisomers; use zig-zag structures please) and predict the ratio or percent composition of the products.The relative reactivity of H abstraction in a chlorination reaction: 1o: 2o: 3o = 1: 4.5: 5.5
How Many Mechanistic Steps?How Many Intermediates?How Many Transition States?Which Step is Rate-Determining?