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Title: | Two new μ2-(1,1-azido) and μ2-(1,1-phenoxido)-bridged dinuclear nickel(II) complexes: Syntheses, single-crystal structures and magnetic studies |
Author: | Manna, Subal Chandra Dolai, Samar Masu, Hyuma Figuerola i Silvestre, Albert Manna, Soumen |
Keywords: | Níquel Cristalls Propietats magnètiques Nickel Crystals Magnetic properties |
Issue Date: | 15-Mar-2019 |
Publisher: | Elsevier B.V. |
Abstract: | Two dinuclear azido bridged Ni(II) complexes [Ni2(HL1)2(N3)(C8H7O3)]∙(H2O) (1) and [Ni2(L2)2(N3)2(H2O)](2) [H2L1 and HL2 are Schiff bases, obtained from the condensation of 2-hydroxy-3-methoxy-benzaldehyde with 2-amino-2-methyl-1-propanol and N,N-diethylethylene diammine, respectively; C8H7O3 = 3-methoxy-2-oxo-benzaldehyde] have been synthesized and their crystal structures have been determined. Complex 1, C32H39N5Ni2O10, crystallizes in a triclinic system, space group P-1 with a = 10.0846(6), b = 12.5179(7), c = 14.1176(8) Å, α = 74.3873(7), β =83.9553(7), γ = 83.1921(7) º and Z = 2; complex 2, C28H44N10Ni2O5 , crystallizes in an orthorhombic system, space group Pbca with a = 12.4197(1), b = 21.4737(4), c = 24.4569(5) Å, and Z = 8. X-ray single crystal structure determination reveals that both the complexes are dinuclear with μ2-(1,1-azido) and μ2-(penoxido) bridges. Variable temperature magnetic studies indicate overall ferromagnetic interaction between nickel(II) centers in both the complexes. The experimental magnetic data of the complexes were fitted using PHI program and isotropic Hamiltonian H = -JS1S2, where S1 = S2 = SNi. A zero-field splitting parameter (D) and intermolecular interaction term (zJ') were also considered in the model and a good agreement between experimental and simulated curves were found by using the following parameters: gNi= 2.13, DNi= 5.83 cm-1, JNi-Ni = 14.61 cm-1 and zJ' = -0.1 cm-1 for 1, and gNi= 2.15, DNi= 2.33 cm-1, JNi-Ni = 13.09 cm-1and zJ' = -0.07 cm-1 for 2. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1016/j.molstruc.2018.12.059 |
It is part of: | Journal of Molecular Structure, 2019, vol. 1180, p. 849-854 |
URI: | https://hdl.handle.net/2445/155259 |
Related resource: | https://doi.org/10.1016/j.molstruc.2018.12.059 |
ISSN: | 0022-2860 |
Appears in Collections: | Articles publicats en revistes (Química Inorgànica i Orgànica) |
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