SYNTHESIS, REACTIVITY, STRUCTURE AND ELECTRONIC-PROPERTIES OF [N(CH3)(4)]C-60-CENTER-DOT-1.5THF - FULLERIDES WITH SIMPLE HEXAGONAL PACKING

The preparation of [N(CH3)(4)] C-60. 1.5thf and characterisation of it s electronic properties, using susceptibility, EPR and C-13 MAS NMR me asurements, is reported. X-Ray powder diffraction shows a simple hexag onal stacking sequence of close-packed C-60 layers, with cations and s olvent molecules located in the trigonal-prismatic sites. The electron ic properties are consistent with narrow-band metallic behaviour at hi gh temperature. A transition insusceptibility and EPR measurements is seen between 200 and 230 K. A similar synthesis affords a C-60(2-) com pound with the same simple hexagonal fulleride packing.