Abstract: Metallo-carbohedrene compositions, their method of manufacture and use are described. The metal component of the compositions is selected from the group of transition elements and preferably is titanium, zirconium, or vanadium. The compositions of the invention are molecular clusters in the ratio 8:12, metal to carbon respectively. A preferred embodiment is Ti.sub.8 C.sub.12 which has a cage-like structure (suggested 12 pentagonal rings and each of the rings is formed by two titanium and three carbon atoms) where each titanium is bound to three carbons. The compositions of this invention represent a new class of stable molecules (metallo-carbohedrenes) having a variety of applications and are particularly useful as electronic materials and catalysts.