A new stable silylene, rac-N,N‘-di-tert-butylethylene-4,5-dimethyl-1,3-diaza-2-silacyclopentan-2-ylide, has been made by reaction of the corresponding dibromide with KC8. Unlike the analogous silylene lacking the two methyl groups, which tetramerizes in concentrated solution or as a solid, the new silylene shows no tendency to oligomerize; instead, it persists as a stable colorless liquid.

di-tert-butyl-4-methyl-1,3-diaza-2-silacyclopentane-2-ylide (7), haVe been synthesized by the reaction of their corresponding dibromides with KC 8 . Unlike the analogous silylene 2, which lacks any backbone substitution and tetramerizes in concentrated solution or as a solid, silylenes 5, 6, and 7 show no tendency to oligomerize. The reactions of 5 with tert-butanol and chloroalkanes giVe only 1:1 O-H or C-Cl insertion products; with adamantyl azide 5 yields the spirosilatetrazoline 8, while with mesityl azide it giVes the azadisilacyclopropane 9.

Transport systems: Long‐range amplification of G‐quadruplex self‐organization by K+ ion templating into double dynameric macroscopic films is described. The ordered membrane films (see image) contribute to fast electron/proton or Na+/K+ transport by the formation of directional conduction pathways.

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