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Keywords:

  • boron;
  • C[BOND]H bonds;
  • density functional calculations;
  • ruthenium;
  • sandwich complexes

Abstract

Thumbnail image of graphical abstract

Colliding double deckers: Addition of zinc to a reaction mixture of [{Cp*RuCl}4]/pentamethyl-2,3-dihydro-1,3-diborole (C3B2Me5H) in THF leads to three known double- and triple-decker complexes of [C3B2Me5], and unexpectedly to the slipped triple-decker (see picture) with two fused diborole rings. The endo C[BOND]H bonds of two MeC[BOND]H groups donate two additional electrons to achieve the stable 34 VE configuration.