Abstract
Two 3D coordination polymers of Mn II with azide and bifunctional zwitterionic ligands bearing both carboxylate and tetrazolate groups, 1-(carboxylatomethyl)-3-(5-tetrazolato)pyridinium (L 1) and 1-(carboxylatoethyl)-4-(5-tetrazolato)pyridinium (L 2), were synthesized, and structurally and magnetically characterized. They are formulated as [Mn 3(L 1) 2(N 3) 4(H 2O) 2] n·4nH 2O (1) and [Mn 3(L 2) 2(N 3) 4(H 2O) 3] n·3.5nH 2O (2). In both compounds, octahedral Mn II ions are linked by the mixed (μ 2-EO-N 3)(μ 2-syn,syn-COO) (μ 2-N 2,N 3-CN 4) (CN 4 = tetrazolate and EO = end-on) triple bridges to give anionic linear trinuclear motifs. The motifs are connected through EE-N 3 (EE = end-to-end) bridges to give layers and chains in 1 and 2, respectively, and the cationic pyridinium spacers serve to interlink the layers or chains into three-dimensional frameworks with the α-Po and CdSO 4-type topology, respectively. Magnetic studies demonstrated that the magnetic interactions within and between the trinuclear motifs, through the tricomponent and EE-N 3 bridges, respectively, are both antiferromagnetic in both compounds.
| Original language | English |
|---|---|
| Pages (from-to) | 4188-4194 |
| Number of pages | 7 |
| Journal | Dalton Transactions |
| Volume | 41 |
| Issue number | 14 |
| DOIs | |
| State | Published - 14 Apr 2012 |