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.
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