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Abstract
Solid state 1H NMR of (KH)3C60 was measured in the temperature range between −80 and 60 °C. A doublet spectrum composed of main peak at −7.0 ppm and shoulder peak at ∼0 ppm was observed at room temperature. The negative chemical shift of the main peak indicates that hydrogen in (KH)3C60 exists as a hydride-like ion. The 60 °C spectrum became singlet at −5.8 ppm due to motional narrowing.