Synthesis and Properties of Hybrid Carbosilane Dendrimers with Cyclosiloxane External Shells

The hydrosilylation of polyallylcarbosilane dendrimers with hydride-containing six- and eight-membered dimethylcyclosiloxanes affords a series of hybrid carbosilane–siloxane dendrimers featuring different densities of the surface cyclosiloxane layers, while retaining all other molecular parameters. The main physicochemical constants of the resulting dendrimers are defined. The possibility of functionalization of these dendrimers by the opening of cyclosiloxane structural moieties in the external shell is demonstrated by the example of the zero-generation dendrimer bearing heptamethylcyclotetrasiloxane terminal groups.