Daniel W Fitzpatrick & Henry J. Ulrich 
Macrocyclic Chemistry [PDF ebook] 
New Research Developments

A macrocycle is, as defined by IUPAC, "a cyclic macromolecule or a macromolecular cyclic portion of a molecule. In the chemical literature, organic chemists may consider any molecule containing a ring of seven or more atoms to be a macrocyle. Coordination chemists generally define a macrocycle more narrowly as a cyclic molecule with three or more potential donor atoms that can coordinate to a metal center.This new book brings together the latest research results from around the world.