Table of Contents
July 2006
Volume 83, Issue 7
Pages 967-1104
About the Cover:
Using Lichen Extract To Study Hydrogen Bonding. Thomas K. Green and Charles A. Lane describe an organic chemistry laboratory that involves extracting and purifying usnic acid from common lichens. The students then perform a computational experiment to estimate the relative strengths of the intramolecular hydrogen bonds of usnic and isousnic acids, two related lichen secondary metabolites.
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