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首页> 外文期刊>Acta Crystallographica Section E: Crystallographic Communications >Crystal structures of Ln(NO3)3(μ2-bpydo)2, where Ln = Ce, Pr or Nd, and bpydo = 4,4′-bi­pyridine N,N′-dioxide: layered coordination networks containing 44 grids
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Crystal structures of Ln(NO3)3(μ2-bpydo)2, where Ln = Ce, Pr or Nd, and bpydo = 4,4′-bi­pyridine N,N′-dioxide: layered coordination networks containing 44 grids

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Three isostructural coordination networks of Ce, Pr, and Nd nitrate with 4,4′-bi­pyridine N,N′-dioxide (bpydo) are reported, namely polytris­(nitrato-κ2O,O′)cerium(III)-bis­(μ2-4,4′-bi­pyridine N,N′-dioxide-κ2N:N′), Ce(NO3)3(C10H8N2O2)2, polytris­(nitrato-κ2O,O′)praeseodymium(III)-bis­(μ2-4,4′-bi­pyridine N,N′-dioxide-κ2N:N′), Pr(NO3)3(C10H8N2O2)2, and polytris(nitrato-κ2O,O′)neodymium(III)-bis­(μ2-4,4′-bi­pyridine N,N′-dioxide-κ2N:N′, Nd(NO3)3(C10H8N2O2)2. All three compounds are isostructural to the previously reported La analogue. The asymmetric unit of Ln(NO3)3(μ2-bpydo)2 contains one lanthanide cation, two bpydo ligands, and three nitrate anions. Both bpydo ligands act as end-to-end μ2-bridges and display nearly ideal cis and gauche conformations, respectively. The bpydo ligands link the ten-coordinate LnIII cations, forming inter­digitating 44 grid-like layers extending parallel to (-101), where inter­digitation of layers is promoted by C—H⋯O inter­actions between nitrate anions and bpydo ligands. The inter­digitated layers are linked to sets of neighboring layers via further C—H⋯O and π–π inter­actions.

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