Number of constitutional repeating units on the path from the free valence to any end-group of a dendron.
Note: The number of generations \(G\) is a cardinal number. A dendron with \(G = n\) generations of constitutional repeating units should be called \(n\mbox{-}\rm{generation}\) dendron. The terms "dendron of \(n^{\rm{th}}\) generation" or "\(n^{\rm{th}}\) generation dendron" are not acceptable.
Source:
PAC, 2019, 91, 523. 'Nomenclature and terminology for dendrimers with regular dendrons and for hyperbranched polymers (IUPAC Recommendations 2017)' on page 533 (https://doi.org/10.1515/pac-2016-1217)