12120-26-2Relevant academic research and scientific papers
Tetrafluoroethyl complexes derived from insertion of the tetrafluoroethylene ligand into an iridium-hydride bond
Burrell, Anthony K.,Roper, Warren R.
, p. 1905 - 1910 (2008/10/08)
The reaction of IrH(CO)(PPh3)3 with tetrafluoroethylene gives the hydride olefin complex IrH-(C2F4)(CO)(PPh3)2. Further reactions of IrH(C2F4)(CO)(PPh3)2 with a coordinating ligand L (L = C2F4, CO, C2H4) result in the insertion of the coordinated olefin into the iridium-hydrogen bond and formation of tetrafluoroethyl complexes, Ir(CF2CF2H)(L)(CO)(PPh3)2. Thermal displacement of the ethylene ligand in Ir(CF2CF2H)(C2H4)(CO)(PPh 3)2 gives the four-coordinate complex Ir(CF2CF2H)(CO)(PPh3)2. The X-ray crystal structure of the dicarbonyl complex Ir(CF2CF2H)(CO)2(PPh3)2 is described. Ir(CF2CF2H)(CO)2(PPh3)2 crystallizes in the triclinic space group P1 with a = 9.868 (5) ?, b = 11.5727 (5) ?, c = 17 083 (9) ? α = 103.9 (4)°, β = 94.14 (4)°, γ = 113.09 (3)°, and Z = 2 with d(calcd) = 1.699 g cm-3 for a molecular weight of 873.83. The structure was refined to give R = 0.0400 and Rw = 0.0407, and in contrast to the geometry displayed in solution, which has trans triphenylphosphines, has a cis arrangement of triphenylphosphine ligands. The Ir-CF2CF2H bond distance is 2.145 (8) ?.
