Synthesis and Characterization of Organochromium Complexes fac-Cr(CO)3(dppe)(η2-C60), fac/mer-Cr(CO)3(dppe)(η2-C60) and fac-Cr(CO)3(L)(dppe) (L=PPh3, 4-MeC5H4N)

Abstract

Reaction of fac-Cr(CO)₃(MeCN)(dppe) [dppe=1,2-bis(diphenylphosphino)ethane] or Cr(CO)₄(dppe) with fullerene C₆₀ afforded a single isomer fac-Cr(CO)₃(dppe)(η²-C₆₀) and an isomeric mixture of fac/mer-Cr(CO)₃(dppe)(η²-C₆₀), whereas the isomer fac-Cr(CO)₃(dppe)(η²-C₆₀) reacted with Ph₃P or 4-methylpyridine to give single isomers fac-Cr(CO)₃(Ph₃P)(dppe) and fac-Cr(CO)₃(4-MeC₅H₄N)(dppe), respectively.