Syntheses,structures, and properties of two mononuclear cobalt(III) azido complexes containing a tetradentate N-donor Schiff base as end-capping ligand |
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Authors: | Sumitava Khan Subhasis Roy Kishalay Bhar Partha Mitra Alexandra M. Z. Slawin Barindra Kumar Ghosh |
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Affiliation: | (1) Department of Chemistry, The University of Burdwan, Burdwan, 713104, India;(2) Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata, 700 032, India;(3) Molecular Structure Laboratory, School of Chemistry, The University of St. Andrews, Purdie Building, St. Andrews, Fife, KY 16 9ST, UK; |
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Abstract: | Two hexacoordinated mononuclear Co(III) compounds of the type cis-[Co(L)(N3)2] X [1, X = ClO4; 2, X = PF6; L = N,N′-(bis(pyridine-2-yl)benzylidine)-1,4-butanediamine] have been synthesized and characterized by physicochemical and spectroscopic methods. The crystal structures of complexes 1 and 2 both have distorted octahedral geometry with two terminal azides in mutual cis orientations. In the crystalline state, two mononuclear units of 1 are associated by weak C–H…π interactions to produce a dimeric unit, which packs through C–H…O hydrogen bonds and π…π interactions leading to a 2-D continuum. The mononuclear units in 2 are engaged in weak cooperative intermolecular C–H…π interactions and multiple C–H…F hydrogen bonds giving rise to a 3-D network structure. These diamagnetic compounds are redox active and show luminescence in DMF solutions. |
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