CHEM 227 Lecture Notes - Lecture 12: Racemic Mixture, Prochirality, Specific Rotation

• School: Texas A&M University
• Department: Chemistry
• Course: CHEM 227
• Professor: Santander Patricio

Document Summary

Know the vocabulary of stereochemistry: chirality, plane of symmetry, chirality center, stereoisomer, enantiomer, dextrorotatory, levorotatory, optically active, specific rotation, diastereomer, meso, racemic mixture, resolution, pro-chirality, pro-r, pro-s, re, si. See list of terms in page 148 (summary and key words) and definitions in appendix c (glossary). Identify chirality centers and apply the sequence rules to designate r or s configurations; predict the number of stereoisomers, identify meso compounds. [ ]d= /l*c (see worked example 5. 2 in the textbook) Understand the logic of resolution of enantiomers (see figure 5. 13) Identify prochiral centers, assign pro-r and pro-s atoms (or groups) and re and si faces. Classify reactions as addition, elimination, substitution or rearrangement and identify kinds of steps within a radical reaction as initiation, propagation, termination. Use curved arrows to indicate the electrons flow in reaction mechanisms (worked example 6. 2) Determine the number of different halogenated products in the reaction of an alkane with x2.