Chapter 5 Stereochemistry Organic Chemistry, 6th Edition L. G. Wade, Jr. Chapter 5 * Summary of Isomers => Chapter 5 Chapter 5 * Stereochemistry The study of 3-D structure of molecues. Recall the 2 different types of isomers: Constitutional Stereoisomers Chapter 5 Chapter 5 * Stereoisomers Same bonding sequence. Different arrangement in space. Example: HOOC-CH=CH-COOH has two geometric (cis-trans) isomers: o o => Chapter 5 Chapter 5 * Chirality ?Handedness?: right glove doesn?t fit the left hand. Mirror-image object is different from the original object. Relationship ? the objects are nonsuperimposable (nonidentical) mirror images. Chapter 5 Chapter 5 * Chirality in Molecules The cis isomer is achiral (?not handed? or identical with its mirror image).