627097-92-1Relevant academic research and scientific papers
Halfsandwich-type complexes of iridium with tetramethylcyclopentadienyl as ligand
Mahr,Nuernberg,Werner
, p. 91 - 98 (2003)
The iridium(I) complexes [(η5-C5HMe4)Ir(C2H 4)2] (2) and [(η5-C5HMe4)Ir(CO)2] (4), which have been prepared from [IrCl(C2H4)2]2 or [IrCl(CO)3]n and LiC5HMe4, react with tosylchloride as well as with X2 (X = Cl, Br, I) by oxidative addition to yield the corresponding iridium(III) compounds. Treating the complexes [(η5-C5HMe4)IrX2]n (7-9) with CO or PR3 leads to a cleavage of the halide bridges and to the formation of the mononuclear products [(η5-C5HMe4)IrX2(CO)] (10, 11) and [(η5-C5HMe4)IrX2(PR 3)] (12-20), respectively. The molecular structure of [(η5-C5HMe4)IrBr2(PiPr 3)] (18) was determined crystallographically. The reactions of 8 (X = Br) and 9 (X = I) with Ph2P(CH2)nPPh2 (n = 1 or 2) afford the bridged compounds [{(η5-C5HMe4)IrX2} 2{μ-Ph2P(CH2)nPPh 2}] (21-23). The dihalide complexes [(η5-C5HMe4)IrI2(PPh 3)] (16) and [(η5-C5HMe4)IrX2(PiPr 3)] (17-19) react with hydride sources to give the dihydrido- and monohydrido derivatives [(η5-C5HMe4)IrH2(PPh 3)] (24) and [(η5-C5HMe4)IrH(X)(PiPr3)] (25-27). The related dimethyl and monomethyl compounds [(η5-C5HMe4)Ir(CH3) 2(PiPr3)] (28) and [(η5-C5HMe4)IrCH3(I)(PiPr 3)] (29) have been obtained from the dihalide precursors 18 or 19 and CH3MgI in the molar ratio of 1:2 or 1:1, respectively.
