Appended Functionality in Pincer Ligands

Pincer and Pincer-Type Complexes Applications in Organic Synthesis and Catalysis, First Edition. 

The title of this chapter merits the question, what defines Junctionality For the purposes of this discussion, we have hmited our definition of JunctiomUty to a group, or groups, of polarizable units with an orientation suitable for cooperative substrate-directed interactions. In most cases, directed interactions should be considered to be toward a metal-bound substrate, but in some instances (i.e., supramolecular self-assemblies and sensors) metal ions may be absent from our discussion. 

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