One of my most common refrains in my organic chemistry classes is that students should strive to understand and apply the foundational principles, as opposed to trying to memorize each example reaction that they’ve encountered. I strongly believe that a mechanistic organization discourages the memorization behaviors that students are almost forced to adopt in a … Continue reading How to Help Students See Patterns of Reactivity: My Experience with Karty’s Text
Coaching Students in the Transition from Chapter 9 to Chapter 10
Chapters 6-10 incrementally ramp up the types of things we hold students accountable for when it comes to reactions. Chapters 6 and 7 introduce students to the 10 most common elementary steps. Chapter 8 deals with constructing multistep mechanisms in reasonable ways. In Chapter 9, students learn how to predict the outcome of SN1/SN2/E1/E2 competition. … Continue reading Coaching Students in the Transition from Chapter 9 to Chapter 10
The Best Tactics for Learning the Elementary Steps of Organic Chemistry
I am a big advocate of the Karty textbook and how it presents mechanisms to the audience. However, mechanisms are not every student’s favorite topic. While some chapters are quite easy to present, others prove to be more challenging for students. I have found that Chapter 7 (“An Overview of the Most Common Elementary Steps”), … Continue reading The Best Tactics for Learning the Elementary Steps of Organic Chemistry
Ten Elementary Steps Are Better Than Four
Mechanisms can greatly simplify learning organic chemistry because the hundreds of reactions that students need to know have mechanisms that are constructed from just a handful of distinct elementary steps. This is easy for us professors to see—after all, we’ve been through the year’s reactions and mechanisms multiple times. Students, on the other hand, must … Continue reading Ten Elementary Steps Are Better Than Four
Seeing the Big Picture
As the semester comes to a close, I have been reflecting on my lectures and experiences with a mechanistically organized course. The Karty text has presented many different types of reactions; from all of the reactions, I want the students to be aware of the central theme in ALL organic mechanisms. In every step, there … Continue reading Seeing the Big Picture
MO Theory? NO Problem
Students at Western Washington University are first introduced to the concept of molecular orbital theory in Organic Chemistry I. It is briefly mentioned in the general chemistry textbook, but it is excluded from covered content in first year classes. First year chemistry students are introduced to the concept of atomic orbital hybridization, but with surface … Continue reading MO Theory? NO Problem
All Downhill After the Aldol
Ah yes, it is that time of year again; a seven week coast to the Organic Chemistry II finish line. All the elementary steps have been introduced and discussed multiple times and it feels like review from here. Most texts seem to end with reactions like Aldol condensation and Robinson Annulation. A functional group approach … Continue reading All Downhill After the Aldol
How the Ten Elementary Steps Unified My Course
For years I told my students they shouldn’t merely memorize a list of reactions. But what were my actions really telling them? In the last textbook I used, the alkene chapter began with nomenclature, then covered Markovnikov addition of H-X and water, halogenation and halohydrin formation, and ended with hydroboration/oxidation. The next chapter that covered … Continue reading How the Ten Elementary Steps Unified My Course
Building on their Knowledge: From Atoms to Multi-Step Synthesis to Curing Sick Puppies
Karty’s mechanistic approach to organic chemistry provides the content organization to facilitate student success. In a functional group approach students are more likely to apply an incorrect mechanism to solve a synthetic problem. This is because classification by functional group does not provide an organizational level that allows students to classify reactivity. Organization by functional … Continue reading Building on their Knowledge: From Atoms to Multi-Step Synthesis to Curing Sick Puppies
My Most Productive Start of the Semester Ever
The first time I taught out of Joel’s text, I had no idea where I was going to put the semester break. I enjoyed how well each chapter flowed into the next, but that left me wondering where to put a five-week break. I was used to a traditional ordering of subject which resulted in … Continue reading My Most Productive Start of the Semester Ever