The Smaller Fullerene C_(50),Isolated as C_(50)Cl_(10)

摘要

Smaller isolable fullerenes have long been sought since the discovery of C_(60).However,fullerenes smaller than C_(60) should be highly reactive due to their condensed pentagons and increased strain.Although smaller fullerenes can be generated in trace amounts by the traditional Kratschmer-Huffman method,in which graphite rods are vaporized by arc-discharge under a low-pressure inert-gas atmosphere,they have not been extracted from the raw soot.The high reactivity also precludes their more conventional chemical syntheses by procedures that gave CC_(60) and its key segments,for example,C_(20)H_(10) C_(36)H_(12),and sumanene.