Abstract
A solution reaction of C 60 with an excess of potassium metal under sonication yields K 3C 60(THF) 14 ( 1; THF = tetrahydrofuran). Compound 1 forms a polymeric linear chain built-up from one potassium ion bridging between two fulleride ions and thereby sitting above a CC bond between two pentagons, while the other two potassium ions cap the C 60 molecule from top and bottom, thereby being located above six-membered rings. The coordination sphere of the potassium centres is completed by THF molecules. The crystal packing reveals a similarity with the face centred cubic lattice of the superconducting K 3C 60 phase. The solution EPR spectrum of 1 exhibits a sharp signal with g = 2.0007 at temperatures between 120 and 330 K.
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