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Dinuclear, dimer-of-dinuclear and new type of polymeric metal complexes of copper(II)–zinc(II)/cadmium(II) derived from a less explored compartmental ligand
Published in Elsevier S.A.
Volume: 483
Pages: 527 - 538
The present study deals with the syntheses, characterization and crystal structures of six compounds of composition [CuIILZnII(SCN)2] (1), [CuIILZnII(N3)2] (2), [{CuIILZnII(dca)}2(µ1,5-dca)2] (3), [CuIILCdII(SCN)2] (4), [{CuIILCdII(N3)}2(µ1,1-N3)2] (5) and [{CuIILCdII(dca)}{CuIILCdII}{CuII(MeCN)LCdII}(µ1,5-dca)5]n (6), where H2L = N,N′-bis(3-ethoxysalicylidene)-1,4-butanediamine and dca = dicyanamide. Either the compound itself or the basic unit in the compound in 1–6 is diphenoxo-bridged dinuclear CuIIZnII or CuIICdII moiety. There is one deprotonated ligand, L2−, per dinuclear unit. Copper(II) occupies the N(imine)2O(phenoxo)2 compartment while zinc(II) or cadmium(II) occupies O(phenoxo)2O(ethoxy)2 compartment of L2−. Thiocyanate in 1 and 4 and azide in 2 behave as monodentate (terminal) ligands, so these three compounds are dinuclear systems. On the other hand, dinuclear units are assembled by μ1,5-dca in 3 and 6 and μ1,1-azide in 5 to generate either dimer-of-dinuclear type tetrametallic clusters (3 and 5) or a one-dimensional coordination polymer (6). Notably, compound 6 represents a new type of coordination polymer. The geometries of the metal ions have been understood from SHAPE analyses. Regarding one pentacoordinated environment, contradiction is observed between the conclusions from SHAPE analyses and Addison geometric parameter. Different coordination geometries of the same metal ion in the same compartment as the function of secondary ligands are observed. © 2018 Elsevier B.V.
About the journal
JournalData powered by TypesetInorganica Chimica Acta
PublisherData powered by TypesetElsevier S.A.
Open AccessNo