Silsesquioxanes (SQs) are being considered for many potential applications from structural materials to electronics, with most focus given to the Oh symmetric cubic cages, [RSiO1.5]8. Little time and effort have been devoted to the five-fold (D5h) symmetric [RSiO1.5]10 counterpart, mainly because synthetic paths to these sets of compounds provide low yields at best. We report here the development of efficient routes to [RSiO1.5]10 where R = Ph and vinyl through fluoride catalyzed rearrangement of their corresponding triethoxysilanes or T-resins, as well as isolation of larger cage SQs. These synthetic procedures allow us to compare their properties (absorption, emission, etc.) with the [RSiO1.5]8 and [RSiO1.5]12 analogs. Isolated yields of [RSiO1.5]10 are >40%. Oligomeric and polymeric materials can also be made from these structures.

Synthesis and properties of D5<sub>h</sub> symmetric phenyl and vinyl silsesquioxanes

247th National Meeting (2014)

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Synthesis and properties of D5h symmetric phenyl and vinyl silsesquioxanes

Synthesis and properties of D5_h symmetric phenyl and vinyl silsesquioxanes