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Keywords:

  • calcium;
  • ether decomposition;
  • Lewis acids;
  • ligand-exchange reactions;
  • phenylcalcium cation
Thumbnail image of graphical abstract

Grignard deluxe: The 1,2-dimethoxyethane adduct of phenylcalcium iodide forms the unique solvent-separated species [(dme)3CaPh]+I with a highly Lewis acidic metal center. Degradation of DME occurs, yielding calcium methoxide cages, such as [{(dme)Ca}4(CaI)23-OMe)86-O)], and methyl vinyl ether. The picture shows the crystal structure of [(dme)3CaPh]+ (Ca brown, C gray, O red).