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Issue 8, 2006
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Coinage metal complexes of tris(pyrazolyl)methanide [C(3,5-Me2pz)3]: κ3-coordination vs. backbone functionalisation

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Abstract

Tris(pyrazolyl)methanides, [C(3,5-R2pz)3], contain an unassociated tetrahedral carbanionic centre in the bridgehead position. In addition to nitrogen donor centres for transition metal coordination, an accessible reactive site for further manipulations is available in the backbone of the ligand. The coordination variability of the ambidental C/N ligand [C(3,5-Me2pz)3] was elucidated by investigating its coinage metal complexes. Two principle coordination modes were found for complexes of general formula [LMPR3] (with M = CuI, AgI, AuI; L = [C(3,5-Me2pz)3]; R = Ph, OMe). While for Cu(I) (2, 3) and Ag(I) (4) complexes the anionic ligand acts as a face-capping, six electron N3-donor, gold(I) (5) is coordinated by the bridging carbanion yielding a two coordinate Au(I) complex comprising a covalent Au–C bond. The complexes featuring the κ3-coordinated N3-donor ligand were investigated by 31P CP (MAS) NMR in the solid state.

Graphical abstract: Coinage metal complexes of tris(pyrazolyl)methanide [C(3,5-Me2pz)3]−: κ3-coordination vs. backbone functionalisation

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Publication details

The article was received on 31 Aug 2005, accepted on 31 Oct 2005 and first published on 28 Nov 2005


Article type: Paper
DOI: 10.1039/B512309G
Citation: Dalton Trans., 2006,0, 1073-1081

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    Coinage metal complexes of tris(pyrazolyl)methanide [C(3,5-Me2pz)3]: κ3-coordination vs. backbone functionalisation

    I. Krummenacher, H. Rüegger and F. Breher, Dalton Trans., 2006, 0, 1073
    DOI: 10.1039/B512309G

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