A rare ferromagnetically coupled asymmetric doubly azido bridged copper(II) dimer with an N,N, O donor Schiff base |
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| Authors: | Shyamapada Shit Pritha Talukder Joy Chakraborty Guillaume Pilet M. Salah El Fallah Joan Ribas Samiran Mitra |
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| Affiliation: | 1. Department of Chemistry, Jadavpur University, Kolkata 700 032, West Bengal, India;2. Groupe de Cristallographie et Ingénierie Moléculaire, Laboratoire des Multimatériaux et Interfaces, UMR 5615, Université Claude Bernard Lyon 1, Bât. Jules Roulin, 43 Bd du 11 Novembre 1918-69622 Villeurbanne Cedex, France;3. Departament de Química Inorgànica, Facultat de Química, Universitat de Barcelona, Martí i Franquès, 1-11 E-08028 Barcelona, Spain |
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| Abstract: | A new end-to-end (EE) doubly azido bridged dinuclear complex [Cu2L2(μ1,3-N3)2] (1) [where L = (E)-4-(2-(dimethylamino)ethylimino)-1,1,1-trifluoropentan-2-one)] has been synthesized and characterized by elemental and spectroscopic techniques. Single crystal X-ray diffraction analysis reveals that the dimeric complex possesses a center of inversion. Each copper atom in 1 is in a distorted square pyramidal geometry with a CuN4O chromophore as revealed from the τ value, 0.19. The four basal positions are occupied by two imine N and one keto O atom of the Schiff base and one N atom from the azide anion. Another N atom from a coordinated azide occupies the apical position. Temperature dependent magnetic susceptibility of 1 was fitted using the Bleaney–Bowers expression which led to the parameters J = 13.6 cm−1 and R = 3.4 × 10−5. It indicates a ferromagnetic interaction through the double azido bridges connecting the individual copper Schiff base units. |
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| Keywords: | Copper(II) Schiff base Crystal structure Doubly azido bridge (EE) Ferromagnetic |
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