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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)2(μ3‐OMe)8(μ6‐O)], and methyl vinyl ether. The picture shows the crystal structure of [(dme)3CaPh]+ (Ca brown, C gray, O red).
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