Species such as 1 may be considered to be molecular minerals. They are assemblies of point-charge ions separated by a greater distance than in the simple salts by virtue of their encapsulation in organic or organosilicon frameworks. Our attempts to synthesise the all-cubic-silsesquioxane 'hidden salt' 1 have been unsuccesful so far although promising leads are being followed. Fluoride ion insertion into a T8 cage is relatively simple and well-established. Insertion of a cation into such a cage is currently unknown. As an alternative to encapsulating a metal ion within a T8 cage we have complexed the cation with crown ethers. The potassium and fluoride complex, 2, represents one of our best attempts at producing such a salt. The synthesis and properties of 2 will be described, together with some mechanistic insights. WAXS, SAXS, DSC, and TGA data will be reported, as well as single crystal X-ray difffraction studies as well as other physical data. The K+ F- distance in 2 is 902pm compared to 268pm in KF.

Steps towards the synthesis of an all-cubic-silsesquioxane molecular mineral" or "hidden salt"

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.