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Hetero-hexanuclear ruthenium-nickel complexes containing 2,2 '-biimidazolate dianion. Synthesis, ESI-MS and X-ray structure characterization

Hetero-hexanuclear ruthenium-nickel complexes containing 2,2 '-biimidazolate dianion. Synthesis, ESI-MS and X-ray structure characterization
Hetero-hexanuclear ruthenium-nickel complexes containing 2,2 '-biimidazolate dianion. Synthesis, ESI-MS and X-ray structure characterization
Efficient and direct synthesis of hexametallic complexes. [{(pap)(2)Ru(biim)}(4)M-2](ClO4)(4) (pap = 2-(Phenylazo) pyridine. M = N-1 [2a] and Cu [2b]) based on the reaction of hydrated MCl2 and [{(pap)(2)Ru(biim)}(2)Ag-2](ClO4)(2) is elaborated. Synthesis of the 2,2'-bipyridine (bpy) analogue of [2a] is also described. Electrospray mass spectra of the complexes are analyzed which fully Corroborate with their formulations. X-ray structure of a representative complex [{(bpy)(2)Ru(biim)(2)}(4)Ni-2](ClO4)(4), [3a] is reported The structure consists of four octahedral [(bpy)(2)Ru(biim)] units arranged around the Ni-2-moiety in a propeller type arrangement. The separation between the two nickel (II) ions in this complex is 2.803(7) angstrom. The dependence of network topology on counteranions is also reported, which ultimately gives rise to a 2D sheet structure. Tile two nickel complexes [2a] and [3a] are diamagnetic and display resolved H-1 NMR spectra in dmso-d(6) These are intensely coloured and their visible range spectra are dominated by all intense transition (epsilon, 37,000-38.000 M-1 cm(-1)) due to Ru d pi-pi* (ligand) transition. These complexes display multiple cyclic voltammetric responses, of which the responses at anodic potentials are ascribed to oxidations of the ruthenium centres.
supramolecular synthons, bridging ligand, generalized-approach, redox properties, 2, 2'-bipyridine, mononuclear, chemistry, ru(ii), core, ions
0376-4710
845-852
Chatterjee, Sudipta
8981c551-1e03-4c44-ba2e-ba48b740f8b4
Kamar, Kunal K.
cca4ef66-be03-474e-a93d-0faf1777ad88
Hursthouse, Michael B.
57a2ddf9-b1b3-4f38-bfe9-ef2f526388da
Light, Mark E.
cf57314e-6856-491b-a8d2-2dffc452e161
Goswami, Sreebrata
85c88658-53b3-4d90-b25d-7869c16a8f7a
Chatterjee, Sudipta
8981c551-1e03-4c44-ba2e-ba48b740f8b4
Kamar, Kunal K.
cca4ef66-be03-474e-a93d-0faf1777ad88
Hursthouse, Michael B.
57a2ddf9-b1b3-4f38-bfe9-ef2f526388da
Light, Mark E.
cf57314e-6856-491b-a8d2-2dffc452e161
Goswami, Sreebrata
85c88658-53b3-4d90-b25d-7869c16a8f7a

Chatterjee, Sudipta, Kamar, Kunal K., Hursthouse, Michael B., Light, Mark E. and Goswami, Sreebrata (2006) Hetero-hexanuclear ruthenium-nickel complexes containing 2,2 '-biimidazolate dianion. Synthesis, ESI-MS and X-ray structure characterization. Indian Journal of Chemistry Section A - Inorganic, Bio-Inorganic, Physical, Theoretical & Analytical Chemistry, 45 (4), 845-852.

Record type: Article

Abstract

Efficient and direct synthesis of hexametallic complexes. [{(pap)(2)Ru(biim)}(4)M-2](ClO4)(4) (pap = 2-(Phenylazo) pyridine. M = N-1 [2a] and Cu [2b]) based on the reaction of hydrated MCl2 and [{(pap)(2)Ru(biim)}(2)Ag-2](ClO4)(2) is elaborated. Synthesis of the 2,2'-bipyridine (bpy) analogue of [2a] is also described. Electrospray mass spectra of the complexes are analyzed which fully Corroborate with their formulations. X-ray structure of a representative complex [{(bpy)(2)Ru(biim)(2)}(4)Ni-2](ClO4)(4), [3a] is reported The structure consists of four octahedral [(bpy)(2)Ru(biim)] units arranged around the Ni-2-moiety in a propeller type arrangement. The separation between the two nickel (II) ions in this complex is 2.803(7) angstrom. The dependence of network topology on counteranions is also reported, which ultimately gives rise to a 2D sheet structure. Tile two nickel complexes [2a] and [3a] are diamagnetic and display resolved H-1 NMR spectra in dmso-d(6) These are intensely coloured and their visible range spectra are dominated by all intense transition (epsilon, 37,000-38.000 M-1 cm(-1)) due to Ru d pi-pi* (ligand) transition. These complexes display multiple cyclic voltammetric responses, of which the responses at anodic potentials are ascribed to oxidations of the ruthenium centres.

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Published date: 2006
Keywords: supramolecular synthons, bridging ligand, generalized-approach, redox properties, 2, 2'-bipyridine, mononuclear, chemistry, ru(ii), core, ions

Identifiers

Local EPrints ID: 39090
URI: http://eprints.soton.ac.uk/id/eprint/39090
ISSN: 0376-4710
PURE UUID: 21ad0396-958a-432d-8485-265216783cf1
ORCID for Mark E. Light: ORCID iD orcid.org/0000-0002-0585-0843

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Date deposited: 20 Jun 2006
Last modified: 05 Nov 2019 01:56

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