No abstract

Carefully designed cyclic hydrosilanes enable trans-selective hydrosilylation of unactivated alkynes without transition metal catalysts via silicate formation. Employment of sterically demanding bidentate ligands of silicon increases steric congestion upon silicate formation, and this strain-imposing strategy facilitates hydride transfer. This hydrosilylation provides efficient access to diverse benzosiloles, silaphenalenes, and related silacycles.

Durch Addition von (gegebenenfalls substituierten) Halogenbenzolen an Tetrakis‐(triphenylphosphin)‐nickel(O) (II) werden die Nickel(II)‐Komplexe (III) dargestellt (35 ‐ 71% Ausbeute), deren thermische Stabilität vom Substituenten abhängt.