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Issue 25, 2014
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Homoleptic and heteroleptic Au(I) complexes containing the new [Co5C(CO)12] cluster as ligand

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The new [{Co5C(CO)12}Au{Co(CO)4}], [1], cluster has been obtained from the reaction of [Co6C(CO)15]2− with two equivalents of [AuCl4]. [1] reacts with an excess of HBF4 resulting in the formation of [{Co5C(CO)12}2Au], [2]. The new derivatives [Co5C(CO)12(AuPPh3)], 3, and [Co5C(CO)11(AuPPh3)3], 4, have been obtained by reacting [2] with two and four equivalents of [Au(PPh3)Cl], respectively. All the new species have been structurally characterised by means of X-ray crystallography as their [NEt4][1], [NEt4][2], [NMe3(CH2Ph)][2], 3 and thf·0.5C6H14 salts and solvates. [2] may be viewed as a homoleptic Au(I) complex containing two [Co5C(CO)12] clusters as ligands. Similarly, [1] and 3 are heteroleptic Au(I) complexes containing one [Co5C(CO)12] cluster ligand as well as [Co(CO)4] or PPh3. Conversely, 4 contains the [Co5C(CO)11]3− cluster stabilized by three [AuPPh3]+ fragments. [1] and [2] have been investigated in solution by means of electrochemical and spectroelectrochemical methods, revealing a very rich redox propensity to form the closely related [1]n (n = 1–3) and [2]n (n = 0–3) species.

Graphical abstract: Homoleptic and heteroleptic Au(i) complexes containing the new [Co5C(CO)12]− cluster as ligand

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The article was received on 21 Mar 2014, accepted on 07 May 2014 and first published on 08 May 2014

Article type: Paper
DOI: 10.1039/C4DT00854E
Citation: Dalton Trans., 2014,43, 9633-9646
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    Homoleptic and heteroleptic Au(I) complexes containing the new [Co5C(CO)12] cluster as ligand

    M. Bortoluzzi, I. Ciabatti, C. Femoni, T. Funaioli, M. Hayatifar, M. C. Iapalucci, G. Longoni and S. Zacchini, Dalton Trans., 2014, 43, 9633
    DOI: 10.1039/C4DT00854E

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