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Keywords:

  • Lewis acids;
  • low-valent compounds;
  • X-ray diffraction;
  • zinc
Thumbnail image of graphical abstract

Reaction without Zn[BOND]Zn rupture: [equation imageZn2] reacts with a fourfold excess of the strong Lewis base 4-dimethylaminopyridine (dmap) to unexpectedly form the Lewis acid–base adduct 1, in which both dmap molecules coordinate in a geminal binding mode to only one zinc atom. Cp*=C5Me5.