Mixed-metal cluster chemistry. 27. Coupling of diphenylbuta-1,3-diyne and CO at tungsten-triiridium cluster cores

Gulliver T. Dalton, Anthony C. Willis, Mark G. Humphrey*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    Reactions of WIr3(CO)11(η-C5H 4R) (R=H, Me) and excess diphenylbuta-1,3-diyne in refluxing toluene afford a large number of products in each case, one of which has been identified as [WIr347-C(Ph)C(C≡ CPh)C(Ph)CC(H)CC6H4 C(O)-2}(CO)7(η-C 5H4R)] [R=H (10 %) (1), Me (6 %)] by a single-crystal X-ray diffraction study of 1. The structure of 1 reveals a unique ten-electron-donating ligand which has formed from combination of two diphenylbuta-1,3-diyne units and one carbonyl group, addition of the latter having presumably proceeded by orthometallation of one phenyl group, followed by formal insertion of the carbonyl into the Ir-phenyl linkage. Crystal data for 1.CH2Cl2: space group P21/n, a = 8.6081(1)Å, b = 39.3638(5)Å, c = 12.3935(2)Å, β = 100.4889(5)°, V = 4129.33(10)Å3, Z = 4, R = 0.030, R w = 0.026 for 4982 reflections [I > 2.00σ(I)].

    Original languageEnglish
    Pages (from-to)291-300
    Number of pages10
    JournalJournal of Cluster Science
    Volume15
    Issue number3
    DOIs
    Publication statusPublished - Sept 2004

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