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    Mono and dinuclear arene ruthenium(II) triazoles by 1,3-dipolar cycloadditions to a coordinated azide in ruthenium(II) compounds

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    Dalton_Trans_40_1020a.pdf (379.7Kb)
    Date
    2011
    Author
    Singh, K.S.
    Svitlyk, V.
    Mozharivskyj, Y.
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    Abstract
    The dimeric Eta sup(6)-hexamethylbenzene ruthenium(II) triazole compounds of formulation (((Eta sup(6)-C sub(6)Me Sub(6))Ru(N sub(3)C sub(2)(CO sub(2)R)sub(2)) sub(2) - (mu C sub(2)O sub(4))) have been synthesized by 1,3-diploar cycloadditions of coordinated azido compound ((Eta sup(6)-C sub(6)Me sub(6))Ru(L sub(1))N sub(3)) (1) with substituted acetylene, RO sub(2)CC sub(2)CO sub(2)R via unexpected oxidation of the coordinated ligand to oxalate (where; L sub(1)= 5-hydroxy-2-(hydroxymethyl)-4-pyrone; R = Me, 3 or Et, 4). In contrast, a similar 1,3-dipolar cycloaddition reaction of (((Eta sup(6)-C sub(6)Me sub(6))Ru(L sub(2))N sub(3))) (2) (where; L sub(2) = tropolone) with acetylene yielded the monomeric triazole compound ((Eta sup(6)-C sub(6)Me sub(6))Ru(L sub(2)){N sub(3)C sub(2)(CO sub(2)R) sub(2))) (where; R = Me, 5; Et, 6). The compounds were characterized by spectroscopy and the structures of representative compounds 4 and 6 have been determined by single crystal X-ray diffraction. The two ruthenium centres in the compound 4, are linked by a tetra-dentate oxalate group. Both compounds, 4 and 6, crystallized in a triclinic space group P-1
    URI
    http://drs.nio.org/drs/handle/2264/3789
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