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Nickel(II)dicyanamide complexes containing a diamine as end-capping ligand: Composition tailored architectures and magnetic properties |
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| Authors: | Sumitra Das Soumi Chattopadhyay Hoong-Kun Fun Joan Ribas |
| Institution: | a Department of Chemistry, The University of Burdwan, Burdwan 713104, India b Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand c X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia d Departament de Química Inorgánica, Universitat de Barcelona, Diagonal, 647, 08028-Barcelona, Spain |
| Abstract: | One 0D monomer trans-Ni(pn)2(dca)2] (1), one neutral 2D polymer Ni(pn)(dca)2]n (2) and one polycationic 1D polymer Ni(pn)2(dca)]n(PF6)n (3) (pn = 1,3-propanediamine; dca = dicyanamide) have been synthesized and X-ray crystallographically characterized. 1 has terminal trans-Ni(dca)2 unit, 2 contains both double bridged Ni-(NCNCN)2-Ni and single bridged Ni-(NCNCN)-Ni units in alternate fashion and 3 consists of single Ni-(NCNCN)-Ni bridge by covalent bonds. The nickel(II) centers are six-coordinated with distorted octahedral geometry. Multiple lateral N-H···N, C-H···N, N-H···F and C-H···F hydrogen bondings promote dimensionality. Variable-temperature magnetic measurements indicate weak antiferromagnetic interactions through μ1,5 bridge(s). |
| Keywords: | Nickel(II)dicyanamides 1 3-Propanediamine Syntheses X-ray structures Antiferromagnetism |
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