Abstract
Potassium silanide [KSiH3]∞ contains 4.2 wt % of hydrogen and has been intensely studied as hydrogen storage material. The macrocyclic ligand Me4TACD (1,4,7,10‐tetramethyl‐1,4,7,10‐tetraaminocyclododecane, L) stabilizes the full range of triphenylsilyl complexes [(L)MSiPh3]n (M=Li–Cs), which react with H2 or PhSiH3 to form molecular [(L)MSiH3]n that can be isolated in soluble form and fully characterized.
Highlights
Metal hydrides are of current interest as hydrogen storage material, because H2 is considered as the only carbon-free energy carrier.[1]
[(Me6TREN)KSiPh3] reacts with H2 to give a soluble form of [aKSiH3]1.[10] we report the synthesis of the full range of alkali metal triphenylsilanides stabilized by the macrocyclic ligand Me4TACD (1,4,7,10-tetramethyl-1,4,7,10-tetraaminocyclododecane, L) and their reactivity towards H2 and PhSiH3 to form molecular trihydridosilanes [(L)MSiH3]n
The potassium complex crystallized from neat THF as the solvate [(L)(thf)KSiPh3] ([THF]-3) that gave amorphous [(L)KSiPh3] (3) under reduced pressure or extended storage at À30 8C, suggesting labile THF solvation
Summary
Metal hydrides are of current interest as hydrogen storage material, because H2 is considered as the only carbon-free energy carrier.[1]. The triphenylsilanide complexes 1–5 were isolated in good yields from THF/n-pentane at À30 8C.
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