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Nickel(II) complexes with bridged polyamines

Matelková, Kristína and Moncol, Ján and Herchel, Radovan and Dlháň, Ľubor and Ivaniková, Radoslava and Svoboda, Ingrid and Padělková, Zděnka and Mašlejová, Anna (2013):
Nickel(II) complexes with bridged polyamines.
In: Polyhedron, Elsevier Science Publishing, pp. 1-8, 56, ISSN 02775387,
[Online-Edition: http://dx.doi.org/10.1016/j.poly.2013.03.028],
[Article]

Abstract

Three nickel(II) complexes [Ni2(μ-trien)(trien)2](ClO4)4 (1), {[Ni2(μ-tren)2(tren)](ClO4)4·3,25H2O}n (2) and [Ni3(μ-tren)2(tren)2(H2O)2]Cl6·2H2O (3) (trien = N,N′-bis(2-aminoethyl)ethane-1,2-diamine, tren = N,N′-bis(2-aminoethyl)-1,2-ethanediamine) were synthesized and structurally characterized. Complex 1 consists of dimeric [Ni2(μ-trien)(trien)2]4+ cation and perchlorate anions, compound 2 contains polymer chain of cation {[Ni2(μ-tren)2(tren)]4+}n, perchlorate anions and uncoordinated water molecules, and structure of 3 consists of [Ni3((μ-tren)2(tren)2(H2O)2]6+ cation, chloride anions and uncoordinated water molecules. All compounds exhibit octahedrally coordinated nickel atoms. Two nickel(II) atoms of [Ni2(μ-trien)(trien)2]4+ cation in 1 are bridged through one trien ligand, which is bidentate to both nickel(II) atoms. The central Ni(II) atom in complex 3 is associated with peripheral atoms with one arm of tren ligand bonded in tridentate fashion, similarly as two nickel(II) atoms in polymer of complex 2. The magnetic behaviour of 1 and 2 complexes have been investigated in terms of magnetic susceptibility and magnetization. The magnetic analyses confirmed weak antiferromagnetic exchange between paramagnetic Ni(II) centres. The experimental observations were further confirmed and studied by DFT method at B3LYP/def2-TZVP level of theory for all compounds.

Item Type: Article
Erschienen: 2013
Creators: Matelková, Kristína and Moncol, Ján and Herchel, Radovan and Dlháň, Ľubor and Ivaniková, Radoslava and Svoboda, Ingrid and Padělková, Zděnka and Mašlejová, Anna
Title: Nickel(II) complexes with bridged polyamines
Language: English
Abstract:

Three nickel(II) complexes [Ni2(μ-trien)(trien)2](ClO4)4 (1), {[Ni2(μ-tren)2(tren)](ClO4)4·3,25H2O}n (2) and [Ni3(μ-tren)2(tren)2(H2O)2]Cl6·2H2O (3) (trien = N,N′-bis(2-aminoethyl)ethane-1,2-diamine, tren = N,N′-bis(2-aminoethyl)-1,2-ethanediamine) were synthesized and structurally characterized. Complex 1 consists of dimeric [Ni2(μ-trien)(trien)2]4+ cation and perchlorate anions, compound 2 contains polymer chain of cation {[Ni2(μ-tren)2(tren)]4+}n, perchlorate anions and uncoordinated water molecules, and structure of 3 consists of [Ni3((μ-tren)2(tren)2(H2O)2]6+ cation, chloride anions and uncoordinated water molecules. All compounds exhibit octahedrally coordinated nickel atoms. Two nickel(II) atoms of [Ni2(μ-trien)(trien)2]4+ cation in 1 are bridged through one trien ligand, which is bidentate to both nickel(II) atoms. The central Ni(II) atom in complex 3 is associated with peripheral atoms with one arm of tren ligand bonded in tridentate fashion, similarly as two nickel(II) atoms in polymer of complex 2. The magnetic behaviour of 1 and 2 complexes have been investigated in terms of magnetic susceptibility and magnetization. The magnetic analyses confirmed weak antiferromagnetic exchange between paramagnetic Ni(II) centres. The experimental observations were further confirmed and studied by DFT method at B3LYP/def2-TZVP level of theory for all compounds.

Journal or Publication Title: Polyhedron
Volume: 56
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Ni(II) complexes, Crystal structures, Magnetism, Bridging tetradentate amines
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Structure Research
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 23 Jan 2015 09:15
Official URL: http://dx.doi.org/10.1016/j.poly.2013.03.028
Identification Number: doi:10.1016/j.poly.2013.03.028
Funders: This work has been supported by Slovak Grant Agency (VEGA, 1/0052/11) and Slovak Research and Development Agency (APVV-0014-11). , R. Herchel thanks to grant from the Ministry of Education of the Czech Republic (MSM6198959218)., K. Matelkova thanks also STU for young scientists grant – ŠMAMEK.
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