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Issue 15, 2003
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Applications of manganocene in the synthesis of Mn(II) amide and imide cages

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Abstract

The reactions of manganocene, Cp2Mn (Cp = C5H5), with 2-aminopyrimidines give similar, octameric amido/imido cage complexes of general formulae [{CpMnNHR}{MnNR}]4 [R = 4,6-Me2pm (1a), 4-MeO-6-Mepm (1b), 4,6-(MeO)2pm (1c); pm = pyrimidinyl]. The structures of these complexes can be visualised as being composed of central Mn4N4 imido cubane units that are coordinated at their peripheries by four [CpMnNHpm] monomers. In contrast, less acidic 2-aminopyridine (2-NH2py) and 8-aminoquinoline (8-NH2quin) are only singly deprotonated under similar conditions, giving the unusual hexanuclear amido complex [Cp2Mn3(NHpy)4]2 (2) and the dimer [CpMn(μ-8-HNquin)]2 (3). N,N′-Dibenzylethylenediamine [(BnNHCH2)2] only forms the simple adduct [(η1-Cp)(η5-Cp)Mn{(BnNHCH2)2}] (4) (Bn = CH2Ph) with Cp2Mn, in which no deprotonation of the organic acid has occurred. The X-ray structures of the new complexes 1b–c, 3 and 4 are reported (1a and 2 having been communicated previously).

Graphical abstract: Applications of manganocene in the synthesis of Mn(ii) amide and imide cages

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Publication details

The article was received on 03 Apr 2003, accepted on 06 Jun 2003 and first published on 26 Jun 2003


Article type: Paper
DOI: 10.1039/B303727B
Citation: Dalton Trans., 2003,0, 3002-3008
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    Applications of manganocene in the synthesis of Mn(II) amide and imide cages

    C. Soria Alvarez, A. Bashall, A. D. Bond, D. Cave, E. A. Harron, R. A. Layfield, M. E. G. Mosquera, M. McPartlin, J. M. Rawson, P. T. Wood and D. S. Wright, Dalton Trans., 2003, 0, 3002
    DOI: 10.1039/B303727B

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