Tri- (M = Cu-II) and hexanuclear (M = Ni-II, Co-II) heterometallic coordination compounds with ferrocene monocarboxylate ligands: Solid-state structures and thermogravimetric, electrochemical and magnetic properties

Karoline Mueller, Marcus Korb, Changhyun Koo, Rudiger Klingeler, Dominique Miesel, Alexander Hildebrandt, Tobias Rueffer, Heinrich Lang

Research output: Contribution to journalArticle

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Abstract

The synthesis and characterization of the hexanuclear [M-2(kappa O-O(2)CFc)(2)(mu-O(2)CFc)(2)(mu-H2O)(kappa N-2,N'-tmeda)(2)] (M-II = Ni, 5; Co, 6; Fc = ferrocenyl, (eta(5)-C5H4)(eta(5)-C5H5)Fe; tmeda = N,N,N',N'-tetramethylethylendiamine) and the trinuclear [Cu(kappa N-2,N'-tmeda)(kappa O-2,O'-O(2)CFc)(2) (2)] (7) coordination compounds are described. Compounds 5-7 were prepared by the consecutive reaction of ferrocene carboxylic acid (FcCO(2)H; 1) with [(Bu4N)-Bu-n]OH followed by treatment of in situ formed [(Bu4N)-Bu-n][FcCO(2)] with the metal salts [M(tmeda)(NO3)(2)] (M = Ni, 2; Co, 3; Cu, 4). The structures of 5-7 in the solid state were determined by single crystal X-ray diffraction analysis. Isostructural 5 and 6 crystallise in the triclinic P (1) over bar (5) and in the monoclinic space group P2(1)/n (6). The two M-II(tmeda) entities of 5 and 6 with M-II = Ni, Co, respectively, are syn, syn-bridged by two FcCO(2)(-) functionalities and one mu-bridging water molecule. Additionally, two FcCO(2)(-) ligands are kappa O-coordinated to each M-II ion to form octahedral MN2O4 coordination setups. A related MN2O4 coordination setup is observed for 7 as well, whereby the Cu-II ion is coordinated by two O(2)CFc and one tmeda ligand. Electrochemical investigations reveal that all individual Fc units of 5-7 are oxidized separately. Thermogravimetric analysis showed that 5 and 6 start to decompose at 110 and 125 degrees C and thus at significantly lower temperatures compared to 7 (200 degrees C). The mass residues obtained after decomposition are composed of Fe2O3, FeNi3 and Fe0.64Ni = Ni-0.36 (5), Fe and Co3O4 (6) and Cu2O and CuFeO2 (7), as determined by powder X-ray diffraction analysis (PXRD). Thermal susceptibility measurements of 5 and 6 determined a weak antiferromagnetic coupling in 5 and 6 with J = 1.1 K and J = 1.9 K, respectively. (C) 2017 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)185-193
Number of pages9
JournalPolyhedron
Volume138
DOIs
Publication statusPublished - 14 Dec 2017
Externally publishedYes

Cite this

Mueller, Karoline ; Korb, Marcus ; Koo, Changhyun ; Klingeler, Rudiger ; Miesel, Dominique ; Hildebrandt, Alexander ; Rueffer, Tobias ; Lang, Heinrich. / Tri- (M = Cu-II) and hexanuclear (M = Ni-II, Co-II) heterometallic coordination compounds with ferrocene monocarboxylate ligands : Solid-state structures and thermogravimetric, electrochemical and magnetic properties. In: Polyhedron. 2017 ; Vol. 138. pp. 185-193.
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abstract = "The synthesis and characterization of the hexanuclear [M-2(kappa O-O(2)CFc)(2)(mu-O(2)CFc)(2)(mu-H2O)(kappa N-2,N'-tmeda)(2)] (M-II = Ni, 5; Co, 6; Fc = ferrocenyl, (eta(5)-C5H4)(eta(5)-C5H5)Fe; tmeda = N,N,N',N'-tetramethylethylendiamine) and the trinuclear [Cu(kappa N-2,N'-tmeda)(kappa O-2,O'-O(2)CFc)(2) (2)] (7) coordination compounds are described. Compounds 5-7 were prepared by the consecutive reaction of ferrocene carboxylic acid (FcCO(2)H; 1) with [(Bu4N)-Bu-n]OH followed by treatment of in situ formed [(Bu4N)-Bu-n][FcCO(2)] with the metal salts [M(tmeda)(NO3)(2)] (M = Ni, 2; Co, 3; Cu, 4). The structures of 5-7 in the solid state were determined by single crystal X-ray diffraction analysis. Isostructural 5 and 6 crystallise in the triclinic P (1) over bar (5) and in the monoclinic space group P2(1)/n (6). The two M-II(tmeda) entities of 5 and 6 with M-II = Ni, Co, respectively, are syn, syn-bridged by two FcCO(2)(-) functionalities and one mu-bridging water molecule. Additionally, two FcCO(2)(-) ligands are kappa O-coordinated to each M-II ion to form octahedral MN2O4 coordination setups. A related MN2O4 coordination setup is observed for 7 as well, whereby the Cu-II ion is coordinated by two O(2)CFc and one tmeda ligand. Electrochemical investigations reveal that all individual Fc units of 5-7 are oxidized separately. Thermogravimetric analysis showed that 5 and 6 start to decompose at 110 and 125 degrees C and thus at significantly lower temperatures compared to 7 (200 degrees C). The mass residues obtained after decomposition are composed of Fe2O3, FeNi3 and Fe0.64Ni = Ni-0.36 (5), Fe and Co3O4 (6) and Cu2O and CuFeO2 (7), as determined by powder X-ray diffraction analysis (PXRD). Thermal susceptibility measurements of 5 and 6 determined a weak antiferromagnetic coupling in 5 and 6 with J = 1.1 K and J = 1.9 K, respectively. (C) 2017 Elsevier Ltd. All rights reserved.",
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Tri- (M = Cu-II) and hexanuclear (M = Ni-II, Co-II) heterometallic coordination compounds with ferrocene monocarboxylate ligands : Solid-state structures and thermogravimetric, electrochemical and magnetic properties. / Mueller, Karoline; Korb, Marcus; Koo, Changhyun; Klingeler, Rudiger; Miesel, Dominique; Hildebrandt, Alexander; Rueffer, Tobias; Lang, Heinrich.

In: Polyhedron, Vol. 138, 14.12.2017, p. 185-193.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Tri- (M = Cu-II) and hexanuclear (M = Ni-II, Co-II) heterometallic coordination compounds with ferrocene monocarboxylate ligands

T2 - Solid-state structures and thermogravimetric, electrochemical and magnetic properties

AU - Mueller, Karoline

AU - Korb, Marcus

AU - Koo, Changhyun

AU - Klingeler, Rudiger

AU - Miesel, Dominique

AU - Hildebrandt, Alexander

AU - Rueffer, Tobias

AU - Lang, Heinrich

PY - 2017/12/14

Y1 - 2017/12/14

N2 - The synthesis and characterization of the hexanuclear [M-2(kappa O-O(2)CFc)(2)(mu-O(2)CFc)(2)(mu-H2O)(kappa N-2,N'-tmeda)(2)] (M-II = Ni, 5; Co, 6; Fc = ferrocenyl, (eta(5)-C5H4)(eta(5)-C5H5)Fe; tmeda = N,N,N',N'-tetramethylethylendiamine) and the trinuclear [Cu(kappa N-2,N'-tmeda)(kappa O-2,O'-O(2)CFc)(2) (2)] (7) coordination compounds are described. Compounds 5-7 were prepared by the consecutive reaction of ferrocene carboxylic acid (FcCO(2)H; 1) with [(Bu4N)-Bu-n]OH followed by treatment of in situ formed [(Bu4N)-Bu-n][FcCO(2)] with the metal salts [M(tmeda)(NO3)(2)] (M = Ni, 2; Co, 3; Cu, 4). The structures of 5-7 in the solid state were determined by single crystal X-ray diffraction analysis. Isostructural 5 and 6 crystallise in the triclinic P (1) over bar (5) and in the monoclinic space group P2(1)/n (6). The two M-II(tmeda) entities of 5 and 6 with M-II = Ni, Co, respectively, are syn, syn-bridged by two FcCO(2)(-) functionalities and one mu-bridging water molecule. Additionally, two FcCO(2)(-) ligands are kappa O-coordinated to each M-II ion to form octahedral MN2O4 coordination setups. A related MN2O4 coordination setup is observed for 7 as well, whereby the Cu-II ion is coordinated by two O(2)CFc and one tmeda ligand. Electrochemical investigations reveal that all individual Fc units of 5-7 are oxidized separately. Thermogravimetric analysis showed that 5 and 6 start to decompose at 110 and 125 degrees C and thus at significantly lower temperatures compared to 7 (200 degrees C). The mass residues obtained after decomposition are composed of Fe2O3, FeNi3 and Fe0.64Ni = Ni-0.36 (5), Fe and Co3O4 (6) and Cu2O and CuFeO2 (7), as determined by powder X-ray diffraction analysis (PXRD). Thermal susceptibility measurements of 5 and 6 determined a weak antiferromagnetic coupling in 5 and 6 with J = 1.1 K and J = 1.9 K, respectively. (C) 2017 Elsevier Ltd. All rights reserved.

AB - The synthesis and characterization of the hexanuclear [M-2(kappa O-O(2)CFc)(2)(mu-O(2)CFc)(2)(mu-H2O)(kappa N-2,N'-tmeda)(2)] (M-II = Ni, 5; Co, 6; Fc = ferrocenyl, (eta(5)-C5H4)(eta(5)-C5H5)Fe; tmeda = N,N,N',N'-tetramethylethylendiamine) and the trinuclear [Cu(kappa N-2,N'-tmeda)(kappa O-2,O'-O(2)CFc)(2) (2)] (7) coordination compounds are described. Compounds 5-7 were prepared by the consecutive reaction of ferrocene carboxylic acid (FcCO(2)H; 1) with [(Bu4N)-Bu-n]OH followed by treatment of in situ formed [(Bu4N)-Bu-n][FcCO(2)] with the metal salts [M(tmeda)(NO3)(2)] (M = Ni, 2; Co, 3; Cu, 4). The structures of 5-7 in the solid state were determined by single crystal X-ray diffraction analysis. Isostructural 5 and 6 crystallise in the triclinic P (1) over bar (5) and in the monoclinic space group P2(1)/n (6). The two M-II(tmeda) entities of 5 and 6 with M-II = Ni, Co, respectively, are syn, syn-bridged by two FcCO(2)(-) functionalities and one mu-bridging water molecule. Additionally, two FcCO(2)(-) ligands are kappa O-coordinated to each M-II ion to form octahedral MN2O4 coordination setups. A related MN2O4 coordination setup is observed for 7 as well, whereby the Cu-II ion is coordinated by two O(2)CFc and one tmeda ligand. Electrochemical investigations reveal that all individual Fc units of 5-7 are oxidized separately. Thermogravimetric analysis showed that 5 and 6 start to decompose at 110 and 125 degrees C and thus at significantly lower temperatures compared to 7 (200 degrees C). The mass residues obtained after decomposition are composed of Fe2O3, FeNi3 and Fe0.64Ni = Ni-0.36 (5), Fe and Co3O4 (6) and Cu2O and CuFeO2 (7), as determined by powder X-ray diffraction analysis (PXRD). Thermal susceptibility measurements of 5 and 6 determined a weak antiferromagnetic coupling in 5 and 6 with J = 1.1 K and J = 1.9 K, respectively. (C) 2017 Elsevier Ltd. All rights reserved.

KW - Molecular structure

KW - Electrochemical studies

KW - Single crystal X-ray diffraction

KW - Thermogravimetry

KW - Magnetic susceptibility

KW - X-RAY-STRUCTURE

KW - HIGH-FIELD EPR

KW - CRYSTAL-STRUCTURE

KW - MOLECULAR-STRUCTURE

KW - NICKEL(II) COMPLEXES

KW - TRIMETHYLACETATE COMPLEXES

KW - STRETCHING FREQUENCIES

KW - HYDROTHERMAL SYNTHESIS

KW - COPPER(III) COMPLEXES

KW - NONAQUEOUS SOLVENTS

U2 - 10.1016/j.poly.2017.09.021

DO - 10.1016/j.poly.2017.09.021

M3 - Article

VL - 138

SP - 185

EP - 193

JO - Polyhedron

JF - Polyhedron

SN - 0277-5387

ER -