Trimeric Iridium(I) and Iridium(III) Complexes with the Tripodal Phosphanecis, cis-1,3,5-Tris[(diphenylphosphanyl)methyl]cyclohexane (tdppmcy) as Bridging Ligand
✍ Scribed by Mayer, Hermann A. ;Kaska, William C.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1995
- Tongue
- English
- Weight
- 444 KB
- Volume
- 128
- Category
- Article
- ISSN
- 0009-2940
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✦ Synopsis
Abstract
Treatment of cis,cis‐1,3,5‐tris[(diphenylphosphanyl)methyl]‐cyclohexane (tdppmcy) (1) with Ir(PPh~3~)~2~(CO)Cl in toluene gives the trinuclear complex [Ir(CO)Cl]~3~(tdppmcy)~2~ (2) in high yield. In this complex the tripodal molecule tdppmcy behaves as a trismonodentate ligand since each phosphorus atom is bound to one metal center. Compound 2 can be transformed into the trinuclear complexes {[Ir(CO)‐(Cl)H]~3~(tdppmcy)~2~)^3+^ (3), [Ir(CO)(Cl)H~2~]~3~(tdppmcy)~2~ (4), and [Ir(CO)H~3~]~3~(tdppmcy)~2~ (5) by treatment with H^+^, H~2~, and H^−^, respectively. The chemistry of 2 supports the spectroscopic findings of a square‐planar environment at the metal centers in 2.