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Discrete systems and two-dimensional coordination polymers containing potentially multidentate and bridging inorganic anions: Observation of a new type of two-dimensional topology
A BISWAS, A JANA, S SARKAR, J A K HOWARD, N ALIAGA-ALCALDE,
Published in Elsevier Ltd
2014
Volume: 74
   
Pages: 57 - 66
Abstract
The work in this report deals with seven compounds of composition {[Cu II(dmpn)2]3[FeIII(CN) 6]2·6H2O}n (1), {[Cu II(dmpn)2]3[CoIII(CN) 6]2·6H2O}n (2), {[Cu II(dmpn)2]3[CrIII(CN) 6]2·4H2O}n (3), {[Cu II(dmpn)][NiII(CN)4]·H 2O}n (4), [{CuII(dmpn)2Cl}{Cu II(dmpn)2(H2O)}][AgI(CN) 2]Cl2 (5), [(CuII(dmpn) 2(dicyanamide)2] (6) and [(NiII(dmpn) 2(dicyanamide)2] (7), where dmpn = 2,2-dimethyl-1,3- diaminopropane. Syntheses, characterization and crystal structures of 1-7 along with variable-temperature (2-300 K) magnetic properties of 1 and 3 are described. Compounds 1-4 are cyanide-bridged two-dimensional coordination polymers. Twelve metal-membered ring is formed in 1-3, while both four and eight metal-membered rings are formed in 4. On the other hand, dicyanoargentate(I) in 5 is noncoordinated and dicyanamide in 6 and 7 behaves as monodentate terminal ligand. The coordination polymers in 1-4 and the discrete systems in 5-7 are self-assembled by hydrogen bonding interactions to generate overall three-dimensional supramolecular topologies. A novel structural aspect, two-dimensional network containing both four and eight metal-membered rings, has been observed in the copper(II)-tetracyanonickelate(II) compound 4. Magnetic studies reveal ferromagnetic interaction between CuII and Cr III in 3. In addition, spin-orbit coupling of low-spin Fe III or weak antiferromagnetic interaction along with intermolecular antiferromagnetic interactions which exist between CuII and Fe III are present in 1. © 2014 Elsevier Ltd. All rights reserved.
About the journal
JournalData powered by TypesetPolyhedron
PublisherData powered by TypesetElsevier Ltd
ISSN0277-5387
Open AccessNo