Day 11 skills review
- Due No Due Date
- Points None
Complete these problems outside of class until you are confident you have learned the SKILLS in this section outlined on the study guide and we will review some of them next class period. 5.17 5.18 5.19 5.21 5.22 5.25 5.26 5.27 5.35 5.36 5.38 5.39 5.40 5.43 5.45 5.46 5.51 6.1 6.2
DAY 11, Terms to know:
Sections 5.4-5.9, 6.1 plane-polarized light, optical activity, specific rotation, configuration vs conformation, levorotatory, dextrorotatory, racemic mixture, enantiomeric excess, meso compound, Fischer projection, chiral resolving agent, affinity chromatography, Enthalpy, homolytic, heterolytic, cleavage, bond dissociation energy, the system, the surroundings, reaction coordinate diagram, exothermic, endothermic
DAY 11, Specific outcomes and skills that may be tested on exam 4:
Sections 5.4-5.9, 6.1
- Be able to explain the (+) and (-) notation and how they refer to the rotation of plane-polarized light and NOT the R or S configuration specifically.
- Given percentages of R and S in a mixture, be able to determine the enantiomeric excess
- Given the enantiomeric excess and the optical rotation observed for a pure enantiomer, be able to determine the %R and %S in a mixture.
- Be able to determine if a molecule with chiral centers is chiral overall or whether it is achiral and a meso compound.
- Be able to describe the methods of determining whether a molecule is chiral or achiral including locating chiral centers, looking for a plane a symmetry, measuring its optial rotation, and seeing if it is superimposable on its mirror image.
- Be able to convert back and forth between wedge/dash structure and Fischer projections for molecules with 1 chiral carbon.
- Be able to use Fischer projections to determine whether pairs of molecules are enantiomers or diastereomers.
- Be able to recognize in a molecule that if only one rotational conformation of the molecule is achiral, then the molecule overall is achiral
- Be able to describe how chiral resolving agents work and how chiral affinity columns work to separate pairs of enantiomers.
- Be able to explain how and why the potential energy is changed when bonds break and how that affects the temperature of the surroundings.
- Be able to explain how and why the potential energy is changed when bonds form and how that affects the temperature of the surroundings.
- Be able to explain how and why the potential energy is changed when weak bonds break and are replaced by strong bonds and how that affects the temperature of the surroundings.
- Be able to explain how and why the potential energy is changed when strong bonds break and are replaced by weak bonds and how that affects the temperature of the surroundings.
- Be able to describe how the temperature of the surroundings is affected for both exothermic and endothermic reactions.