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Crystal structures, magnetic properties and DFT study of cobalt(II) azido complexes with the condensation product of 2-quinolinecarboxaldehyde and Girard's T reagent

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Abstract

A tridentate NNO condensation product of 2-quinolinecarboxaldehyde and Girard's T reagent (HLCl) in the presence of azide ions coordinates with cobalt(II) giving mononuclear azido Co(II) complex [CoHL(N3)3] (1) as a main product and dinuclear end-on azido bridged Co(II) complex [Co2L2(μ-1,1-N3)2(N3)2] (2) in traces. Crystal structures of both complexes were determined. Variable temperature magnetic susceptibility measurement studies of complex 1 showed that Co(II) cation is in the low-spin state with t2g6eg1 (S = 1/2) configuration. DFT-BS calculations for complex 2 anticipated ferromagnetic type interaction between paramagnetic centers (J = 53 cm−1).

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Romanović, M., Milenković, M. R., Pevec, A., Turel, I., Spasojević, V., Grubišić, S., … Čobeljić, B. (2018). Crystal structures, magnetic properties and DFT study of cobalt(II) azido complexes with the condensation product of 2-quinolinecarboxaldehyde and Girard’s T reagent. Polyhedron, 139, 142–147. https://doi.org/10.1016/j.poly.2017.10.018

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