Synthesis and Structures of Mononuclear 3,4-Bis(Trifluoromethyl)Pyrrolyl Complexes of Rh(I) and Ni(II)

New mononuclear complexes of the 3,4-bis(trifluoromethyl)pyrrolyl ligand (3,4-(CF3)(2)-Pyr(-)) with Rh(I) and Ni(II) are reported. Reaction of 3,4-(CF3)(2)-PyrNa with Rh(COD)Cl produces [Rh(PMe3)(3)(3,4-(CF3)(2)(-)Pyr)] (1) while reaction of 3,4-(CF3)(2)-PyrH with [Ni(PMe3)(2)Me-2] (2) or [Ni(PMe3)(2)Ph-2] (4) gives [trans-Ni (PMe3)(2) (3,4-(CF3)(2)-Pyr)(CH3)] (3) or [trans-Ni(PMe3)(2)(C6H5)(3,4-(CF3)2-Pyr)] (5) respectively. Complexes 1, 3 and 5 have been characterized spectroscopically and all five compounds have been structurally characterized by single crystal X-ray diffraction studies.