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Issue 1, 2010
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Activation of C–H bonds mediated by Mo[triple bond, length as m-dash]Mo moieties in heterobimetallic Zn/O/Moclusters

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Abstract

Heterobimetallic drive and cooperativity lead to a striking scenario for C–H bond activation and heteroaggregation involving MoIII dimers. Reaction of (RO)3Mo[triple bond, length as m-dash]Mo(OR)3 with molar excess of ZnMe2 at–78 °C affords the novel mixed Zn, Mo oxo clusters [Mo2(MeZn)62-Me)(μ3-CH2)2(OR)7] 1 (R = neopentyl) and 2 (R = cyclohexyl) preserving the Mo[triple bond, length as m-dash]Mo triple bond, while the same reaction performed at ambient temperature gives rise to the related cluster [Mo2(MeZn)62-CH2)(μ3-CH2)2(OR)6] 3. These complexes represent the first examples of heterobimetallic Mo[triple bond, length as m-dash]Mo complexes with bridging methyl and methylene groups and agostic C–H→Mo interactions, as well as penta-coordinate carbon. The complexes 1–3 were characterized by elemental analyses, multinuclear NMR and single-crystal X-ray diffraction analysis.

Graphical abstract: Activation of C–H bonds mediated by Mo [[triple bond, length as m-dash]] Mo moieties in heterobimetallic Zn/O/Mo clusters

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Publication details

The article was received on 26 Aug 2009, accepted on 08 Oct 2009 and first published on 05 Nov 2009


Article type: Paper
DOI: 10.1039/B917585G
Dalton Trans., 2010,39, 103-106

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    Activation of C–H bonds mediated by Mo[triple bond, length as m-dash]Mo moieties in heterobimetallic Zn/O/Mo clusters

    J. Ma, Y. Aksu, L. J. Gregoriades, J. Sauer and M. Driess, Dalton Trans., 2010, 39, 103
    DOI: 10.1039/B917585G

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