118494-48-7Relevant academic research and scientific papers
Synthesis and reaction chemistry of (η5-indenyl)(cyclooctadiene)iridium: Migration of indenyl from iridium to cyclooctadiene
Merola, Joseph S.,Kacmarcik, Raymond T.
, p. 778 - 784 (2008/10/08)
(η5-Indenyl)(cyclooctadiene)iridium was synthesized in high yield from chloro(cyclooctadiene)iridium dimer and lithium indenide. The reaction chemistry of the above compound was investigated with respect to the displacement of the cyclooctadiene with various nucleophiles. Thus, (η5-indenyl)dicarbonyliridium could be synthesized in high yield by treating the cyclooctadiene complex with carbon monoxide at atmospheric pressure. However, the addition of trimethylphosphine, PMe3, to the cyclooctadiene complex resulted not in the displacement of cyclooctadiene but in the migration of indene from iridium to cyclooctadiene forming (2-indenylcyclooct-5-en-1-yl)tris(trimethylphosphine)iridium, I, quantitatively. A single-crystal X-ray structural determination of I was carried out and confirmed the migration of indene to the cyclooctadiene. I crystallizes in the orthorhombic space group P212121 with a = 10.019 (1) A?, b = 18.836 (3) A?, c = 29.602 (4) A?, V = 5586 (2) A?3, and Z = 8. The syntheses of a related series of (trimethylsilyl-substituted indenyl)iridium complexes are also reported along with some suggestions for the mechanism of the iridium to cyclooctadiene indenyl migration.
