2016 journal article
Crystal structures of [<i>Ln</i>(NO<sub>3</sub>)<sub>3</sub>(μ<sub>2</sub>-bpydo)<sub>2</sub>], where<i>Ln</i>= Ce, Pr or Nd, and bpydo = 4,4′-bipyridine<i>N</i>,<i>N</i>′-dioxide: layered coordination networks containing 4<sup>4</sup>grids
Acta Crystallographica Section E Crystallographic Communications, 72(1), 25–30.
author keywords: crystal structure; cerium coordination; network; praseodymium coordination network; neodymium coordination network; 4,4'-bipyridine N,N'-dioxide (bpydo); C-H center dot center dot center dot O interactions; mu-mu interactions; 4(4) grid
TL;DR:
The crystal structures of poly[bis(μ2-4,4′-bipyridine N,N′-dioxide-κ2 O:O′)trinitratocerium(III)] and its isostructural praseodymium and neodynium analogues feature a 44 grid-like layered structure.
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Added: September 22, 2022
Three isostructural coordination networks of Ce, Pr, and Nd nitrate with 4,4′-bipyridineN,N′-dioxide (bpydo) are reported, namely poly[[tris(nitrato-κ2O,O′)cerium(III)]-bis(μ2-4,4′-bipyridineN,N′-dioxide-κ2N:N′)], [Ce(NO3)3(C10H8N2O2)2], poly[[tris(nitrato-κ2O,O′)praeseodymium(III)]-bis(μ2-4,4′-bipyridineN,N′-dioxide-κ2N:N′)], [Pr(NO3)3(C10H8N2O2)2], and poly[[tris(nitrato-κ2O,O′)neodymium(III)]-bis(μ2-4,4′-bipyridineN,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 idealcisandgaucheconformations, respectively. The bpydo ligands link the ten-coordinateLnIIIcations, forming interdigitating 44grid-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 layersviafurther C—H...O and π–π interactions.