Solid Salts
Addition of 2,2,2-cryptand to a solution of +e− affords +e−. Evaporation of these solutions yields a blue-black paramagnetic salt with the formula +e−.
Most solid electride salts decompose above 240 K, although 4+(e-)4 is stable at room temperature. In these salts, the electron is delocalized between the cations. Electrides are paramagnetic and Mott insulators.
Read more about this topic: Electride
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