This is the second quarter of the organic chemistry series. Topics covered include: Fundamental concepts relating to carbon compounds with emphasis on structural theory and the nature of chemical bonding, stereochemistry, reaction mechanisms, and spectroscopic, physical, and chemical properties of the principal classes of carbon compounds. This video is part of a 26-lecture undergraduate-level course titled "Organic Chemistry" taught at UC Irvine by Professor David Van Vranken. Index of Topics: 00:31- Doritos Ingredients 01:38- Molecular Structures of Doritos Ingredients CHAPTER 16-Conjugation, Resonance, and Dienes 03:46- 16.1: What is Conjugation? 10:36- 16.3: Common Forms of Resonance 20:07- 16.3, 16.4: Rank Resonance Structures to Predict Properties 29:00- 16.5: Lone pairs must be in p orbitals to interact with pi bonds 35:27- 16.6: Two flat conformers of conjugated dienes 41:12- 16.9: Reactivity of pi bonds vs. stability of the overall molecule 46:06- 16.10-1,2: Addition vs. 1,4-Addition