Abstract
The reaction of the cyclometalated five‐coordinate 16 VE iridium(III) compound [IrCl(H)(P(tBu)2C6H4‐κ2P,C)(P(tBu)2Ph)] (1) with the strong π‐acceptor ligand trifluorophosphane resulted quickly in the quantitative formation of the new iridium(I) complex trans‐[IrCl(PF3)(P(tBu)2Ph)2] (2). This unexpected spontaneous reductive elimination was already observed in reactions of 1 with the very strong π‐acceptor ligands CO and NO+. First indications during reactions of 1 with lesser strong π‐acceptor ligands like alkyl or arylphosphanes did not show this inversion behavior of the cyclometalation. The title species 2 was characterized by spectroscopic methods and its molecular structure in the crystal was confirmed by X‐ray crystallography.
Highlights
We reported the X-ray crystal structure of the cyclometalated five-coordinate complex [IrCl(H)(P(tBu)2C6H4-κ2P,C)(P(tBu)2Ph)] (1).[1]
The title species 2 was characterized by spectroscopic methods and its molecular structure in the crystal was confirmed by X-ray crystallography
We found that the coordinatively unsaturated complex 1 reacted spontaneously with the strong π-acceptor ligand CO and NO+, respectively, with an inversion of the cyclometalation affording the iridium(I) compound trans-[IrCl(CO)(P(tBu)2Ph)2] as well as the isoelectronic complex trans-[IrCl(NO)(P(tBu)2Ph)2]+ isolated as its tetrafluoridoborate salt in excellent yields.[1]
Summary
We reported the X-ray crystal structure of the cyclometalated five-coordinate complex [IrCl(H)(P(tBu)2C6H4-κ2P,C)(P(tBu)2Ph)] (1).[1]. The title species 2 was characterized by spectroscopic methods and its molecular structure in the crystal was confirmed by X-ray crystallography. We reported the X-ray crystal structure of the cyclometalated five-coordinate complex [IrCl(H)(P(tBu)2C6H4-κ2P,C)(P(tBu)2Ph)] (1).[1] Because that species exhibits 16 valence electrons, it showed a high reactivity towards small molecules.
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