NO Chiral Center... Still Chiral?

Most chemistry students learn that chirality comes from a carbon atom bonded to four different groups. But that's only part of the story. In this video, we explore molecules that are chiral without a classical chiral center, including allenes, helicenes, atropisomers, biphenyls, and planar chiral compounds. You'll learn how axial chirality, helical chirality, and planar chirality arise from molecular geometry, restricted rotation, and symmetry. We also cover stereochemistry, enantiomers, atropisomerism, trans-cyclooctene, and the assignment of absolute configuration. If you want to deepen your understanding of organic chemistry, stereochemistry, and molecular chirality, this video is for you. ------------------------------------------------------------------------------------------------------------------------- References: Stereochemistry and Organic Reactions: Conformation, Configuration, Stereoelectronic Effects and Asymmetric Synthesis. Book by Dipak K. Mandal. https://share.google/DmQSFvP2Q68GP6JOA A Student-Friendly Approach to Introduce the Evolution of Planar Chirality. https://doi.org/10.1021/acs.jchemed.3... Stereochemistry of Organic Compounds: Principles and Applications Book by D. Nasipuri. Symmetry, Spectroscopy, and Crystallography: The Structural Nexus. Book by Robert Glaser. https://onlinelibrary.wiley.com/doi/b... ------------------------------------------------------------------------------------------------------------------------- Time Code: 00:00 - Intro 00:30 - What Makes a Molecule Chiral? 01:28 - Allenes 02:31 - Why Allenes Are Chiral 02:57 - Assigning R/S Configuration to Chiral Allenes 04:10 - When Are Allenes Achiral? 04:43 - Axial Chirality 05:19 - Helicenes: 06:34 - Biphenyl Chirality and Steric Hindrance 08:05 - How to Assign Configuration in Chiral Biphenyls 09:37 - Planar Chirality 10:03 - Trans-Cyclooctene