Homo-/heterotrinuclear mixed-valent oxo-centered iron/nickel clusters-mössbauer studies on internal electron-exchange processes

Rolf W. Saalfrank; Andreas Scheurer; Uwe Reimann; Frank Hampel; Christian Trieflinger; Michael Büschel; Jörg Daub; Alfred X. Trautwein; Volker Schünemann; Veaceslav Coropceanu

doi:10.1002/chem.200500097

Homo-/heterotrinuclear mixed-valent oxo-centered iron/nickel clusters-mössbauer studies on internal electron-exchange processes

Rolf W. Saalfrank
, Andreas Scheurer
, Uwe Reimann
, Frank Hampel
, Christian Trieflinger
, Michael Büschel
, Jörg Daub
, Alfred X. Trautwein
, Volker Schünemann
, Veaceslav Coropceanu

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

In a one-pot reaction of N-(5-methylthiazole-2-yl)-thiazole-2-carboxamide HL² (3) with iron(II) acetate in air, the homotrinuclear heteroleptic mixed-valent oxo-centered iron cluster [Fe^IIFe₂ ^IIIO(L²)₃(OAc)₃] (4) was formed. Exchange of iron(II) in 4 by nickel(II) afforded the heteronuclear cluster [Ni^IIFe₂^IIIO(L²)₃(OAc) ₃] (6). To obtain crystals suitable for X-ray structure analyses, in 4 and 6, the OAc^- co-ligands were exchanged by OBz ligands to give [Fe^IIFe₂^IIIO(L²)₃(OBz) ₃] (5) and [Ni^IIFe₂^IIIO(L ²)₃(OBz)₃] (7). The complexes 5 and 7 are isostructural and made up of three ditopic, tridentate ligands (L ²)^- and three bridging benzoate co-ligands, which fix the three metal ions in the corners of a triangle with an μ₃-O ^2- ion in the center. The mixed-valent character of 4-7, their intramolecular electron-exchange processes, and their redox properties were studied by variable-temperature Mössbauer spectroscopy and cyclic voltammetry.

Original language	English (US)
Pages (from-to)	5843-5848
Number of pages	6
Journal	Chemistry - A European Journal
Volume	11
Issue number	20
DOIs	https://doi.org/10.1002/chem.200500097
State	Published - Oct 7 2005
Externally published	Yes

Keywords

Electron exchange iron
Mixed valence
Moessbauer spectroscopy
Trinuclear

ASJC Scopus subject areas

Catalysis
Organic Chemistry

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10.1002/chem.200500097

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Saalfrank, R. W., Scheurer, A., Reimann, U., Hampel, F., Trieflinger, C., Büschel, M., Daub, J., Trautwein, A. X., Schünemann, V., & Coropceanu, V. (2005). Homo-/heterotrinuclear mixed-valent oxo-centered iron/nickel clusters-mössbauer studies on internal electron-exchange processes. Chemistry - A European Journal, 11(20), 5843-5848. https://doi.org/10.1002/chem.200500097

Saalfrank, RW, Scheurer, A, Reimann, U, Hampel, F, Trieflinger, C, Büschel, M, Daub, J, Trautwein, AX, Schünemann, V & Coropceanu, V 2005, 'Homo-/heterotrinuclear mixed-valent oxo-centered iron/nickel clusters-mössbauer studies on internal electron-exchange processes', Chemistry - A European Journal, vol. 11, no. 20, pp. 5843-5848. https://doi.org/10.1002/chem.200500097

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title = "Homo-/heterotrinuclear mixed-valent oxo-centered iron/nickel clusters-m{\"o}ssbauer studies on internal electron-exchange processes",

abstract = "In a one-pot reaction of N-(5-methylthiazole-2-yl)-thiazole-2-carboxamide HL2 (3) with iron(II) acetate in air, the homotrinuclear heteroleptic mixed-valent oxo-centered iron cluster [FeIIFe2 IIIO(L2)3(OAc)3] (4) was formed. Exchange of iron(II) in 4 by nickel(II) afforded the heteronuclear cluster [NiIIFe2IIIO(L2)3(OAc) 3] (6). To obtain crystals suitable for X-ray structure analyses, in 4 and 6, the OAc- co-ligands were exchanged by OBz ligands to give [FeIIFe2IIIO(L2)3(OBz) 3] (5) and [NiIIFe2IIIO(L 2)3(OBz)3] (7). The complexes 5 and 7 are isostructural and made up of three ditopic, tridentate ligands (L 2)- and three bridging benzoate co-ligands, which fix the three metal ions in the corners of a triangle with an μ3-O 2- ion in the center. The mixed-valent character of 4-7, their intramolecular electron-exchange processes, and their redox properties were studied by variable-temperature M{\"o}ssbauer spectroscopy and cyclic voltammetry.",

keywords = "Electron exchange iron, Mixed valence, Moessbauer spectroscopy, Trinuclear",

author = "Saalfrank, \{Rolf W.\} and Andreas Scheurer and Uwe Reimann and Frank Hampel and Christian Trieflinger and Michael B{\"u}schel and J{\"o}rg Daub and Trautwein, \{Alfred X.\} and Volker Sch{\"u}nemann and Veaceslav Coropceanu",

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doi = "10.1002/chem.200500097",

language = "English (US)",

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T1 - Homo-/heterotrinuclear mixed-valent oxo-centered iron/nickel clusters-mössbauer studies on internal electron-exchange processes

AU - Saalfrank, Rolf W.

AU - Scheurer, Andreas

AU - Reimann, Uwe

AU - Hampel, Frank

AU - Trieflinger, Christian

AU - Büschel, Michael

AU - Daub, Jörg

AU - Trautwein, Alfred X.

AU - Schünemann, Volker

AU - Coropceanu, Veaceslav

PY - 2005/10/7

Y1 - 2005/10/7

N2 - In a one-pot reaction of N-(5-methylthiazole-2-yl)-thiazole-2-carboxamide HL2 (3) with iron(II) acetate in air, the homotrinuclear heteroleptic mixed-valent oxo-centered iron cluster [FeIIFe2 IIIO(L2)3(OAc)3] (4) was formed. Exchange of iron(II) in 4 by nickel(II) afforded the heteronuclear cluster [NiIIFe2IIIO(L2)3(OAc) 3] (6). To obtain crystals suitable for X-ray structure analyses, in 4 and 6, the OAc- co-ligands were exchanged by OBz ligands to give [FeIIFe2IIIO(L2)3(OBz) 3] (5) and [NiIIFe2IIIO(L 2)3(OBz)3] (7). The complexes 5 and 7 are isostructural and made up of three ditopic, tridentate ligands (L 2)- and three bridging benzoate co-ligands, which fix the three metal ions in the corners of a triangle with an μ3-O 2- ion in the center. The mixed-valent character of 4-7, their intramolecular electron-exchange processes, and their redox properties were studied by variable-temperature Mössbauer spectroscopy and cyclic voltammetry.

AB - In a one-pot reaction of N-(5-methylthiazole-2-yl)-thiazole-2-carboxamide HL2 (3) with iron(II) acetate in air, the homotrinuclear heteroleptic mixed-valent oxo-centered iron cluster [FeIIFe2 IIIO(L2)3(OAc)3] (4) was formed. Exchange of iron(II) in 4 by nickel(II) afforded the heteronuclear cluster [NiIIFe2IIIO(L2)3(OAc) 3] (6). To obtain crystals suitable for X-ray structure analyses, in 4 and 6, the OAc- co-ligands were exchanged by OBz ligands to give [FeIIFe2IIIO(L2)3(OBz) 3] (5) and [NiIIFe2IIIO(L 2)3(OBz)3] (7). The complexes 5 and 7 are isostructural and made up of three ditopic, tridentate ligands (L 2)- and three bridging benzoate co-ligands, which fix the three metal ions in the corners of a triangle with an μ3-O 2- ion in the center. The mixed-valent character of 4-7, their intramolecular electron-exchange processes, and their redox properties were studied by variable-temperature Mössbauer spectroscopy and cyclic voltammetry.

KW - Electron exchange iron

KW - Mixed valence

KW - Moessbauer spectroscopy

KW - Trinuclear

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U2 - 10.1002/chem.200500097

DO - 10.1002/chem.200500097

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AN - SCOPUS:26844475093

SN - 0947-6539

VL - 11

SP - 5843

EP - 5848

JO - Chemistry - A European Journal

JF - Chemistry - A European Journal

IS - 20

ER -

Homo-/heterotrinuclear mixed-valent oxo-centered iron/nickel clusters-mössbauer studies on internal electron-exchange processes

Abstract

Keywords

ASJC Scopus subject areas

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