Mixed-metal cluster chemistry. 35. Syntheses and structural studies of Mo3Ir3(μ3-O)(μ-CO)3(CO)8(η5-C5H5)3, Mo4Ir4(μ-CO)4(CO)9(η5-C5H5)4 and Mo3Ir5(μ-CO)3(Cl)(CO)6(η5-C5H5)3(η5-C5HMe4)

Junhong Fu,Graeme J Moxey,Marie P Cifuentes,Mark G Humphrey

doi:10.1016/j.jorganchem.2015.01.002

Junhong Fu, Graeme J Moxey + Show 2 more

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https://doi.org/10.1016/j.jorganchem.2015.01.002

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Abstract

The reaction of Ir(CO)2(η5-C5HMe4) with Mo2Ir2(μ-CO)3(CO)7(η5-C5H5)2 affords a complex mixture from which three structurally-characterized products were obtained following thin-layer chromatography. Mo3Ir3(μ3-O)(μ-CO)3(CO)8(η5-C5H5)3 (1) is Effective Atomic Number (EAN) Rule EAN-precise and possesses an edge-bridged trigonal bipyramidal core with the face-capping oxo ligand located in a Mo2Ir2 butterfly cleft in the structure. Mo4Ir4(μ-CO)4(CO)9(η5-C5H5)4 (2) possesses four electrons less than the Polyhedral Skeletal Electron Pair Theory (PSEPT)-expected count for a capped pentagonal bipyramidal cluster with the apical atoms within bonding distance. Mo3Ir5(μ-CO)3(Cl)(CO)6(η5-C5H5)3(η5-C5HMe4) (3) possesses a tetracapped tetrahedral core and has six electrons less than the PSEPT-predicted electron count. The core geometries exhibited by clusters 2 and 3 have previously only been observed for clusters including significant group 10 and group 11 metal content.

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