Proposed Cascade Nomenclature Rules

In the cascade name, components (names of the units) are separated from each other by colons and are cited in sequence from the core unit out to the terminal units. 

The name begins with a numeral corresponding to the number of terminal functionalities, followed in succession by Cascade (to denote this class of molecules) and names of the core unit, repeat intermediate unit(s), and finally the terminal unit(s). 

The combination of core and terminal unit names resembles conjunctive nomenclature. The multiplicity of branching (cascading) from the core unit is indicated by a bracketed numeral immediately following the name of the core unit if locants are necessary, they are also enclosed within the brackets, following and separated by a hyphen from the multiplicity numeral. 

A repeat intermediate unit consists of the molecular fragment extending from (but not including) one branch atom (or group) through the next cascade branching site. 

The parent chain of an intermediate or terminal unit always terminates at a cascade branching site. 

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The nomenclature of cascade molecules according to the common rules has its difficulties. The names became extremely long and the fundamental structure of the molecule cannot be quickly derived from them. Newkome et al. therefore proposed a new nomenclature that reflects the structure in the sense that it names the molecule from the core towards the periphery. [8] Furthermore, the class of compound becomes clear, since the names begin with Z-Cascade , where Z is the number of functional groups on the periphery. 

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