ready isolation for characterization. In addition, synthesis Keywords Fullerene · Phosphorus ylide · Reusable of such fullerene-containing complexes offers the poten- nanocatalyst · Mizoroki–Heck reaction tial to exploit new opportunities such as chemical reactiv- ity, redox and electron acceptor characteristics, magnetic properties and optical activity [10, 11]. Although numer- 1 Introduction ous reports of exohedral metallofullerenes have appeared in recent literature [12, 13], palladium-fullerene complexes Since the discovery of fullerene in 1985 by Kroto et al. containing phosphorus ligands have received relatively , coordination chemistry of transition metal-fullerene less attention. Among these complexes, simple mono- complexes has been the focus of considerable interest from and diphosphines are the most commonly used ligands to both the synthetic and theoretical communities [2–7]. Exo- prepare palladacyclopropa fullerenes [14–18]. Our hedral metallofullerenes, in which the metal atom is cova- recent studies revealed that the α-keto stabilized phos- lently bonded on the outside of carbon cage , are found phorus ylides containing versatile functionalized diphos- to be synthesized more readily than the endohedral metal- phines 1,1-bis(diphenylphosphino)methane (dppm) and lofullerenes that encapsulate a metal atom or cluster inside 1,2-bis(diphenylphosphino)ethane (dppe) could coordi- hollow carbon cage . This is because of the exohedral nate to Pd(0) center of palladacyclopropafullerene metallofullerenes
Catalysis Letters – Springer Journals
Published: Jul 24, 2017
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