Organic Chemistry with BiologicalApplications,3rEdition John McMurry Chapter 04 Organic compounds: cycloalkanes and their stereochemistry The chemistry of a given functional group is affected by being in a ring rather than an open chain. Cyclic molecules are so commonly encountered in most pharmaceuticals and in all classes of biomolecules. It's important to understand the consequences of cyclic structures.Chapter 04 Organic compounds ： cycloalkanes and their stereochemistry Organic Chemistry with Biological Applications, 3 rd Edition John McMurry The chemistry of a given functional group is affected by being in a ring rather than an open chain. Cyclic molecules are so commonly encountered in most pharmaceuticals and in all classes of biomolecules. It’s important to understand the consequences of cyclic structures