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A set of new coordination compounds of cadmium(II)/mercury(II) halides/pseudohalides containing polyamines: Syntheses involving in situ metal–ligand reactions, crystal structures and molecular properties
- Source :
-
Inorganica Chimica Acta . Apr2012, Vol. 384, p37-46. 10p. - Publication Year :
- 2012
-
Abstract
- Abstract: Coordination compounds of the types [Hg(atta)][HgCl4] (1), [Cd5(apda)2Cl10] n (2), [Cd3(apda)2(N3)4] n (ClO4)2 n (3) and [Cd2(bpda)(NCS)4] n (4) [atta=4-(2-aminoethyl)-triethylenetetramine; apda= N-(2-aminoethyl)piperazine-1,4-diethylamine; bpda= N,N′-bis(2-aminoethyl)piperazine-1,4-diethylamine] are isolated using tetraethylenepentamine (tepa; for 1–3)/pentaethylenehexamine (peha; for 4) in presence of cadmium(II)/mercury(II) halides/pseudohalides. Structural studies reveal that polyamines tepa and peha undergo interesting in situ rearrangement to afford atta/apda and bpda ligands, respectively. Asymmetric unit in 1 comprises of discrete [Hg(atta)]2+ cation and [HgCl4]2− anion. Compound 2 consists of neutral pentanuclear core [Cd5Cl10] formed by three different types of chloride bridges propagating through binucleating bitridentate character of apda to afford a 1D ladder structure. 2D coordination polymer 3 with (4162)(4262) topology is formed through double μ1,1- and single μ1,3-azide bridges and binucleating behavior of apda. Alternating double μ1,3-thiocyanate and binucleating bis(tridentate) bridges in 4 result in a 1D zig-zag chain. Different kinds of non-covalent interactions promote dimensionalities in 1–4. Thermal behaviors of 1–4 are examined. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00201693
- Volume :
- 384
- Database :
- Academic Search Index
- Journal :
- Inorganica Chimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 73339582
- Full Text :
- https://doi.org/10.1016/j.ica.2011.11.022