An unprecedented Cu–Schiff base complex existing as two different trinuclear units with strong antiferromagnetic couplings |
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| Authors: | Aurkie Ray Dipali Sadhukhan Georgina M Rosair Carlos J Gmez-García Samiran Mitra |
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| Institution: | aDepartment of Chemistry, Jadavpur University, Raja S.C. Mullick Road, Kolkata 700 032, West Bengal, India;bSchool of Engineering and Physical Sciences, Heriot Watt University, Edinburgh, EH14 4AS, UK;cInstituto de Ciencia Molecular ICMol, University of Valencia, Parque Científico, 46980 Paterna, Spain |
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| Abstract: | A new tetradentate N2O2 donor Schiff base ligand OHC6H4CH NCH2CH2CH(CH2CH3)NCHC6H4OH = H2L ] was obtained by 1:2 condensation of 1,3-diaminopentane with salicylaldehyde and has been used to synthesise an unusual copper(II) complex whose asymmetric unit presents two structurally different almost linear trinuclear units Cu3(μ-L)2(ClO4)2] Cu3(μ-L)2(H2O)(ClO4)2] (1). The ligand and the complex were characterised by elemental analysis, FT-IR, 1H NMR and UV–Vis spectroscopy in addition electrochemical and single crystal X-ray diffraction studies were performed for the complex. The magnetic properties of 1 reveal the presence of strong intra-trimer (J1 = −202(3) cm−1 and J2 = −233(3) cm−1) as well as very weak inter-trimer (zJ′ = −0.11(1) cm−1) antiferromagnetic interactions. |
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| Keywords: | CuII– Schiff base complex Linear Bent Trinuclear units Crystal structures Intra-trimer Inter-trimer Antiferromagnetic couplings |
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