Recent Tutoring Session Reviews
"We went over a practice exam's questions. Nomenclature, orbital hybridization, and drawing orbitals, identifying the hybrid orbitals making the MO's (the bonds), resonance, acids and bases and resonance, isomers and drawing conformational isomer, and converting Newman projection to a sawhorse one with dashes and wedges. All about chair conformations, determining axial and equatorial, drawing the two possible chair conformations, counting the gauche interactions."
"We went over stereochemistry to help him better prepare for his upcoming exam. I used my molecular model kit to help see why some compounds were considered achiral and to be able to compare two different drawn structures. This included better understanding the 3D shape of allene compounds and realizing that their pi bonds are actually perpendicular to each other. I also demonstrated with model kit how a bicyclic ring looked that he was working on and he used his molecular model kit to also try to see it better. He also got a little more practice with using Fischer projections and how to draw them based on a 3D drawing of the molecule and then likewise, how to determine R/S from the Fischer projections. He seems well prepared for his exam, but it is not until next Tuesday."
"We went over the stability of substituted cyclohexane, with the more stable having a chair conformation with the fewest axial groups to reduce 1,3-diaxial interactions. We also went over the relative sizes of the groups, t-butyl being so large that it forces the conformation of the system to put itself equatorial. Alkyl groups are larger than single atoms or OH, or even methoxy groups, since the alkyl groups have hydrogen atoms or alkyl groups that further exacerbate, 1,3-diaxial strain. We then continued going over Sn1 and Sn2."
"Diels Alder- Endo and exo products, aromaticity, thermodynamic and kinetic examples. He struggled with determining pi bonds in aromatic compounds and if electrons were part of that. Very good attitude as usual."
"During our first meeting for Orgo II, the student and I spent the majority of our time going through her class notes and making sure she understood the concepts presented in class. Alkenes were the predominant topic of learning, from how to synthesize an alkene from an alkane - and vice versa - to mechanisms behind a wide variety of additions to an alkene. She and I walked through each "recipe" of addition presented in class and made sure she understood the mechanism and could recognize it in future problems. Because the nature of Orgo II is more memorization based - compared to Orgo I, which is more focused on foundational work, we devised a strategy together to help her memorize the reactions we have covered. Similarly to last semester, I am excited to work with her, and I have confidence that she will perform as well in Orgo II as she did in Orgo I!"
"During this session we covered chapter 10 on alcohols. We also did some brief review on nomenclature and chirality. The student has quite a bit of review to do, since it's been so long since he took Organic I. I suggested that he make flashcards of all the functional groups. Since his professor did not give any practice problems for chapter 10, I will be assigning some to him out of the textbook. I am also going to give a list of essential reading of Organic I topics that would be important for him to review."