Explore the structural aspects of 1,2-addition versus conjugate addition in this 19-minute lecture from NPTEL-NOC IITM. Delve into the concept of hard and soft nucleophiles, focusing on their reactivity with alpha-beta unsaturated carbonyl compounds. Examine the principles of hard-hard and soft-soft interactions, and gain insights into transmetallation processes. Learn about the significance of organocopper reagents in organic synthesis. Enhance your understanding of conjugate addition mechanisms and their applications in organic chemistry.