Youtor
183 EAS OrthoPara Directors vs EAS Meta Directors Organic Chemistry
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=K05bDJMVgUI
Chad gives a thorough presentation on Ortho-Para directors and Meta Directors in EAS Reactions. He begins by identifying electron-donating groups and electron-withdrawing groups and showing how electron-donating groups are activating groups in EAS reactions, whereas electron-withdrawing groups are deactivating. He provides a table of benzene substituents which can be used to predict relative rates of reactivity in EAS reactions. Chad shows how electron-donating groups stabilize the sigma complex intermediate in EAS reactions, whereas electron-withdrawing groups destabilize the sigma complex. • He then shows how electron-donating groups stabilize the sigma complex most when substitution occurs at the ortho and para positions explaining why they are ortho-para directors. He then shows how most electron-withdrawing groups destabilize the sigma complex the most when substitution occurs at the ortho and para positions explaining why they are meta directors. He also points out how halogens are the exceptions in that they are ortho-para directors through electron-withdrawing groups. • Finally, Chad shows several examples of how to predict the products of EAS reactions with substituted benzenes. • I've created an organic chemistry page that organizes all my videos by chapter - just an easier way for you to watch my YouTube videos. Check it out at https://www.chadsprep.com/organic-che... • 00:00 Lesson Introduction • 00:54 EAS Activating Groups vs EAS Deactivating Groups • 07:32 EAS Electron-Donating Groups | EAS Ortho-Para Directors • 19:46 Halogens: EAS Electron-Withdrawing Groups and EAS Ortho-Para Directors • 22:23 EAS Meta Directors • 25:37 Special Reactivity of Aminobenzenes in EAS Reactions • 28:54 EAS Predicting the Products Example #1 • 30:54 EAS Predicting the Products Example #2 • 32:38 EAS Predicting the Products Example #3 • 33:24 EAS Predicting the Products Example #4 • 36:28 EAS Predicting the Products Example #5 • https://www.chadsprep.com/
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