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21 More About Amines • Heterocyclic Compounds
21 More About Amines • Heterocyclic Compounds

... in Chapter 30, when we take a look at how drugs are discovered and designed. Amines are also exceedingly important compounds to organic chemists, far too important to leave until the end of a course in organic chemistry. We have, therefore, already studied many aspects of amines and their chemistry. ...
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Hypervalent molecule

A hypervalent molecule (the phenomenon is sometimes colloquially known as expanded octet) is a molecule that contains one or more main group elements formally bearing more than eight electrons in their valence shells. Phosphorus pentachloride (PCl5), sulfur hexafluoride (SF6), chlorine trifluoride (ClF3), and the triiodide (I3−) ion are examples of hypervalent molecules.
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