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Synthesis, structural aspects and magnetic properties of an unusual 2D thiocyanato-bridged cobalt(II)-Schiff base network |
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| Authors: | Santarupa Thakurta Carlos J Gómez-García Samiran Mitra |
| Institution: | a Department of Chemistry, Jadavpur University, Kolkata 700 032, India b Department of Chemistry, Howard University, 2400 Sixth Street, NW Washington, DC 20059, USA c Instituto de Ciencia Molecular (ICMol), Parque Científico, University of València, 46980 Paterna, Spain d Department of Chemistry and Center for Biotechnology Development and Biodiversity Research, University of Sassari, Via Vienna 2, I-07100 Sassari, Italy |
| Abstract: | A new two-dimensional (2D) thiocyanato-bridged cobalt(II) network formulated as LCo2(NCS)2]n (1), has been synthesized with the Schiff base ligand N,N′-bis(3-methoxysalicylidenimino)-1,3-diaminopropane (H2L) and thiocyanate anions. This novel layered compound has been completely characterized by elemental analysis, FT-IR, UV-Vis spectroscopy and the structure has been established by single crystal X-ray diffraction studies. The structure of 1 consists of a doubly phenoxo-bridged dimer comprising two different cobalt(II) centers with different coordination geometries (octahedral and tetrahedral). The 2D network is accomplished by bridging thiocyanate ligands, connecting the dimeric motifs in an end-to-end fashion. Variable-temperature magnetic susceptibility and EPR measurements reveal predominant antiferromagnetic exchange interaction in the complex. |
| Keywords: | Cobalt(II) Schiff base Thiocyanato-bridged 2D polymer Mixed Oh-Td geometries Antiferromagnetic coupling |
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