Magnetic and spectroscopic properties of a series of linear homo- and heterotrinuclear clusters with asymmetric 3,4-disubstituted 1,2,4-triazoles as ligands.

Petra J. van Koningsbruggen, Jaap G. Haasnoot, Wim Vreugdenhil, Jan Reedijk, Olivier Kahn

Research output: Contribution to journalArticle

Abstract

The syntheses, spectroscopic and magnetic properties are described of a series of transition metal(II) tetrafluoroborate and perchlorate compounds with the asymmetric ligands 3-methyl-4-ethyl-1,2,4-triazole (metz) and 3-methyl-4-phenyl-1,2,4-triazole (mptz). A series of coordination compounds have been obtained with the general formula [M3L6(H2O6] (anion)6(H2O)x (L = metz, anion = ClO4, M = Mn (x = 1.5), Fe (x = 0), Co (x = 3), Ni (x = 1.5), anion = BF4, M = Mn (x = 6), Co (x = 3), Ni (x = 0); L = mptz, anion = ClO4, M = Mn (x = 1.5), Fe (x = 0), Co (x = 1.5), Ni,Zn (x = 0), Cd (x = 5), anion = BF4-, M = Mn (x = 1.5, Co, Ni, Zn, Cd (x = 0). A linear trinuclear structure is proposed for these compounds, in which the metal (II) ions are linked to each other by two pairs of three N1, N2 bridging 1,2,4-triazole ligands. The coordination sphere around the terminal metal (II) ions is completed by water molecules. The two unequal coordination sites present in these compounds allow a route to the synthesis of heterotrinuclear species. Pure samples of the heterotrinuclear Mn(II)-Ni(II)-Mn(II) compounds have been obtained. The magnetic susceptibilities of the compounds have been recorded and were fitted to theoretical expressions for linear trimers. For all compounds the interaction between neighbouring metal(II) ions appeared to be antiferromagnetic and rather weak. Fitting of the magnetic susceptibility for the heteronuclear MnNiMn compound results in the values; J = −1.88 cm−1, gMn = 1.99 andgNi = 2.30 (based on the spin Hamiltonian): ∧H = −2J[∧SMn−a · ∧SNi) + (∧SMn−b · ∧SNi)).

Original languageEnglish
Pages (from-to)5-12
Number of pages8
JournalInorganica Chimica Acta
Volume239
Issue number1-2
DOIs
Publication statusPublished - Nov 1995

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Anions
Negative ions
Ligands
magnetic properties
anions
ligands
Metal ions
Magnetic susceptibility
metals
magnetic permeability
Hamiltonians
ions
synthesis
perchlorates
trimers
Transition metals
Magnetic properties
transition metals
routes
1,2,4-triazole

Keywords

  • magnetism
  • spectroscopic properties
  • transition metal complexes
  • triazole complexes
  • polynuclear complexes

Cite this

@article{157d88a348f04888bb2b9134b8ddf493,
title = "Magnetic and spectroscopic properties of a series of linear homo- and heterotrinuclear clusters with asymmetric 3,4-disubstituted 1,2,4-triazoles as ligands.",
abstract = "The syntheses, spectroscopic and magnetic properties are described of a series of transition metal(II) tetrafluoroborate and perchlorate compounds with the asymmetric ligands 3-methyl-4-ethyl-1,2,4-triazole (metz) and 3-methyl-4-phenyl-1,2,4-triazole (mptz). A series of coordination compounds have been obtained with the general formula [M3L6(H2O6] (anion)6(H2O)x (L = metz, anion = ClO4−, M = Mn (x = 1.5), Fe (x = 0), Co (x = 3), Ni (x = 1.5), anion = BF4−, M = Mn (x = 6), Co (x = 3), Ni (x = 0); L = mptz, anion = ClO4−, M = Mn (x = 1.5), Fe (x = 0), Co (x = 1.5), Ni,Zn (x = 0), Cd (x = 5), anion = BF4-, M = Mn (x = 1.5, Co, Ni, Zn, Cd (x = 0). A linear trinuclear structure is proposed for these compounds, in which the metal (II) ions are linked to each other by two pairs of three N1, N2 bridging 1,2,4-triazole ligands. The coordination sphere around the terminal metal (II) ions is completed by water molecules. The two unequal coordination sites present in these compounds allow a route to the synthesis of heterotrinuclear species. Pure samples of the heterotrinuclear Mn(II)-Ni(II)-Mn(II) compounds have been obtained. The magnetic susceptibilities of the compounds have been recorded and were fitted to theoretical expressions for linear trimers. For all compounds the interaction between neighbouring metal(II) ions appeared to be antiferromagnetic and rather weak. Fitting of the magnetic susceptibility for the heteronuclear MnNiMn compound results in the values; J = −1.88 cm−1, gMn = 1.99 andgNi = 2.30 (based on the spin Hamiltonian): ∧H = −2J[∧SMn−a · ∧SNi) + (∧SMn−b · ∧SNi)).",
keywords = "magnetism, spectroscopic properties, transition metal complexes, triazole complexes, polynuclear complexes",
author = "{van Koningsbruggen}, {Petra J.} and Haasnoot, {Jaap G.} and Wim Vreugdenhil and Jan Reedijk and Olivier Kahn",
year = "1995",
month = "11",
doi = "10.1016/0020-1693(95)04680-1",
language = "English",
volume = "239",
pages = "5--12",
journal = "Inorganica Chimica Acta",
issn = "0020-1693",
publisher = "Elsevier",
number = "1-2",

}

Magnetic and spectroscopic properties of a series of linear homo- and heterotrinuclear clusters with asymmetric 3,4-disubstituted 1,2,4-triazoles as ligands. / van Koningsbruggen, Petra J.; Haasnoot, Jaap G.; Vreugdenhil, Wim; Reedijk, Jan; Kahn, Olivier.

In: Inorganica Chimica Acta, Vol. 239, No. 1-2, 11.1995, p. 5-12.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Magnetic and spectroscopic properties of a series of linear homo- and heterotrinuclear clusters with asymmetric 3,4-disubstituted 1,2,4-triazoles as ligands.

AU - van Koningsbruggen, Petra J.

AU - Haasnoot, Jaap G.

AU - Vreugdenhil, Wim

AU - Reedijk, Jan

AU - Kahn, Olivier

PY - 1995/11

Y1 - 1995/11

N2 - The syntheses, spectroscopic and magnetic properties are described of a series of transition metal(II) tetrafluoroborate and perchlorate compounds with the asymmetric ligands 3-methyl-4-ethyl-1,2,4-triazole (metz) and 3-methyl-4-phenyl-1,2,4-triazole (mptz). A series of coordination compounds have been obtained with the general formula [M3L6(H2O6] (anion)6(H2O)x (L = metz, anion = ClO4−, M = Mn (x = 1.5), Fe (x = 0), Co (x = 3), Ni (x = 1.5), anion = BF4−, M = Mn (x = 6), Co (x = 3), Ni (x = 0); L = mptz, anion = ClO4−, M = Mn (x = 1.5), Fe (x = 0), Co (x = 1.5), Ni,Zn (x = 0), Cd (x = 5), anion = BF4-, M = Mn (x = 1.5, Co, Ni, Zn, Cd (x = 0). A linear trinuclear structure is proposed for these compounds, in which the metal (II) ions are linked to each other by two pairs of three N1, N2 bridging 1,2,4-triazole ligands. The coordination sphere around the terminal metal (II) ions is completed by water molecules. The two unequal coordination sites present in these compounds allow a route to the synthesis of heterotrinuclear species. Pure samples of the heterotrinuclear Mn(II)-Ni(II)-Mn(II) compounds have been obtained. The magnetic susceptibilities of the compounds have been recorded and were fitted to theoretical expressions for linear trimers. For all compounds the interaction between neighbouring metal(II) ions appeared to be antiferromagnetic and rather weak. Fitting of the magnetic susceptibility for the heteronuclear MnNiMn compound results in the values; J = −1.88 cm−1, gMn = 1.99 andgNi = 2.30 (based on the spin Hamiltonian): ∧H = −2J[∧SMn−a · ∧SNi) + (∧SMn−b · ∧SNi)).

AB - The syntheses, spectroscopic and magnetic properties are described of a series of transition metal(II) tetrafluoroborate and perchlorate compounds with the asymmetric ligands 3-methyl-4-ethyl-1,2,4-triazole (metz) and 3-methyl-4-phenyl-1,2,4-triazole (mptz). A series of coordination compounds have been obtained with the general formula [M3L6(H2O6] (anion)6(H2O)x (L = metz, anion = ClO4−, M = Mn (x = 1.5), Fe (x = 0), Co (x = 3), Ni (x = 1.5), anion = BF4−, M = Mn (x = 6), Co (x = 3), Ni (x = 0); L = mptz, anion = ClO4−, M = Mn (x = 1.5), Fe (x = 0), Co (x = 1.5), Ni,Zn (x = 0), Cd (x = 5), anion = BF4-, M = Mn (x = 1.5, Co, Ni, Zn, Cd (x = 0). A linear trinuclear structure is proposed for these compounds, in which the metal (II) ions are linked to each other by two pairs of three N1, N2 bridging 1,2,4-triazole ligands. The coordination sphere around the terminal metal (II) ions is completed by water molecules. The two unequal coordination sites present in these compounds allow a route to the synthesis of heterotrinuclear species. Pure samples of the heterotrinuclear Mn(II)-Ni(II)-Mn(II) compounds have been obtained. The magnetic susceptibilities of the compounds have been recorded and were fitted to theoretical expressions for linear trimers. For all compounds the interaction between neighbouring metal(II) ions appeared to be antiferromagnetic and rather weak. Fitting of the magnetic susceptibility for the heteronuclear MnNiMn compound results in the values; J = −1.88 cm−1, gMn = 1.99 andgNi = 2.30 (based on the spin Hamiltonian): ∧H = −2J[∧SMn−a · ∧SNi) + (∧SMn−b · ∧SNi)).

KW - magnetism

KW - spectroscopic properties

KW - transition metal complexes

KW - triazole complexes

KW - polynuclear complexes

UR - http://www.sciencedirect.com/science/article/pii/0020169395046801

U2 - 10.1016/0020-1693(95)04680-1

DO - 10.1016/0020-1693(95)04680-1

M3 - Article

VL - 239

SP - 5

EP - 12

JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

SN - 0020-1693

IS - 1-2

ER -