Dendritic branching rules

Dendrimers within a generational series can be expected to present their terminal groups in at least three different modes, namely, flexible, semi-flexible, or rigid functionalized scaffolding. Based on mathematically defined dendritic branching rules (i.e., Z = the various surface presentations become more congested... 

The nomenclature according to IUPAC rules has proven particularly unwieldy in the case of dendrimers. Several proposals have been made [25]. The major classes of dendrimers described here are represented in Schemes 1-4 in short-hand form. Other particular dendritic structures will be characterized by reaction schemes or by their branch unit in the text. 

STRUCTURE Dendrimers are three-dimensional macromolecules consisting of three major architectural components a core, branch cells, and terminal groups. These products are constructed from repeat units called branch cells [e.g., —CH2—CH2—CH2—N(CH2—CH2—012)2] iri concentric generations (G) surrounding various cores according to dendritic rules and principles, where = multiplicity of core N, = multiplicity of branch cell and Z = terminal groups (i.e., -CN or —CH2-NH2). 

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