Properties and reactivity of the new [Ir 4(μ-CO) 3(CO) 5(μ-PR 3)(PR 3) 2] clusters, (PR 3 = PPH xpyl 3− x, pyl = 2-pyri)

The complex Ir 4(CO) 12 was shown to react with pyridylphosphines to give [Ir 4(μ-CO) 3(CO) 5(μ-PPh 2pyl) 2] ( 1) [Ir 4(μ-CO) 3(CO) 5(μ-PPhpyl 2)(PPhpyl 2) 2] ( 2) and [Ir 4(μ-CO) 3(CO) 5)(μ-Ppyl 3)(Ppyl 3) 2] ( 3) in which one of the phosphine ligands bridges through coordination of P and N atoms....

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Bibliographic Details
Published in:Journal of organometallic chemistry 1996-02, Vol.508 (1), p.75-81
Main Authors: Wajda-Hermanowicz, K., Pruchnik, F., Zuber, M.
Format: Article
Language:English
Subjects:
Carbonyl
Clusters
Iridium
NMR spectroscopy
Phosphine
Pyridyl
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Summary:The complex Ir 4(CO) 12 was shown to react with pyridylphosphines to give [Ir 4(μ-CO) 3(CO) 5(μ-PPh 2pyl) 2] ( 1) [Ir 4(μ-CO) 3(CO) 5(μ-PPhpyl 2)(PPhpyl 2) 2] ( 2) and [Ir 4(μ-CO) 3(CO) 5)(μ-Ppyl 3)(Ppyl 3) 2] ( 3) in which one of the phosphine ligands bridges through coordination of P and N atoms. Clusters 1– 3 were characterized by 1H, 31P NMR and IR spectroscopy. Variable-temperature 1H, 31P and 13C NMR spectra of 1– 3 were investigated and the results are discussed. In solution under CO complexes 1– 3 are in equilibrium with the clusters [Ir(μ-CO) 3(CO) 6(PR 3) 3].
ISSN:0022-328X
1872-8561
DOI:10.1016/0022-328X(95)05779-O