Identifying Configurations

Select a problem from the list on the right. When the Show Problem button is pressed a structural formula will be displayed in the drawing window. If the structure has a stereogenic center, assign the configuration as R or S. If the structure is achiral, check that button. To evaluate your answer click the Check Answer button; numbers indicating the CIP priority order of substituents at the stereogenic center will be displayed (1 = highest priority, 4 = lowest).

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R Configuration
S Configuration

Problem 1
Problem 2
Problem 3
Problem 4
Problem 5
Problem 6
Problem 7
Problem 8
Problem 9
Problem 10

This script written by William Reusch, Dept. of Chemistry, Michigan State University. Please send comments and corrections to
JME Molecular Editor v2002.05 by: by Peter Ertl