Answer Happy

2. Stability of alkenes Alkene stability is often gauged by the enthalpy of hydrogenation. A more stable alkene will have a smaller heat of hydrogenation as the change in bond energy is smaller from reactants to products. Rank the following alkenes from the largest heat of hydrogenation to the smallest. A. 1,1,2,2-tetramethylethene B. 1,1-dimethylethene. C. (Z)-1,2-dimethylethene D. (E)-1,2-dimethylethene E. ethene
6. Beer's Law and Absorption and Color Benzene Absorption of electromagnetic radiation can often be explained by the energy gap between frontier molecular orbitals. What are the frontier orbitals called and what is the notation for the excitation of an electron via absorption? 7. Mechanistic Steps and Arrows Draw the correct arrows for each mechanistic step. Label each step with an appropriate description. HBr ta 8. Inductive effects versus resonance Inductive effects are most commonly a result of electronegativity acting through sigma bonds. Electron density shifts in accordance with expected bond dipoles. Identify the direction of the bond dipole in the following inductive examples: -NH₂ HS- Resonance effect can also explain electron density shifts. The electron density will be delocalized over several key region. Using resonance structure indicate where the negative charge "resides". It may be helpful to draw in the lone pairs on the oxygen. -F شرات -OH -H