Synthesis, Characterization, and Electrochemical Properties of Novel Transition Metal–Fullerene Complexes Containing Di‐ and Tetraphosphane Ligands

This paper reports the synthesis, characterization, and some properties of transition metal–fullerene complexes containing trans ‐1,1′‐bis(diphenylphosphanyl)ethylene (dppet, trans ‐Ph 2 PCH=CHPPh 2 ) and N , N , N ′, N ′‐tetra(diphenylphosphanylmethyl)ethylene diamine (dppeda, [(Ph 2 PCH 2 ) 2 NCH 2 ] 2 ), including [(η 2 ‐C 60 M)(dppet) 2 ] (M = Pt 1 , Pd 2 ), [(η 2 ‐C 60 M)(dppet)] 2 (M = Pt 3 , Pd 4 ), [(η 2 ‐C 60 Pd)(η 2 ‐C 60 Pt)(dppet) 2 ]( 5 ), [(η 2 ‐C 60 Pd)(η 2 ‐C 70 Pd)(dppet) 2 ] ( 6 ), [(η 2 ‐C 70 Pd)(dppet)] 2 ( 7 ), [(η 2 ‐C 60 M)(dppeda)] (M = Pt 8 , Pd 9 ), and [(η 2 ‐C 60 M) 2 (dppeda)] (M = Pt 10 , Pd 11 ). Interestingly, while complexes 1 , 2 , 8 , and 9 are the first examples of metallacyclopropafullerene diphosphane ligands containing fullerene cores, complexes 3 – 7 , 10 , and 11 are the first group 10 metal‐containing, dumbbell‐shaped bisfullerenes. All the complexes 1 – 11 were characterized by elemental analysis, spectroscopy, and, particularly for 4 and 5 , by X‐ray crystallography and cyclic voltammetry. Pathways for the formation of 1 – 11 are suggested. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)