[Rh].FC(F)(F)c1cccc(c1)P(CC(C)(CP(c2cccc(c2)C(F)(F)F)c3cccc(c3)C(F)(F)F)CP(c4cccc(c4)C(F)(F)F)c5cccc(c5)C(F)(F)F)c6cccc(c6)C(F)(F)F