Hydrated Rare Earth Structural Networks containing the Phenylene‐1, 2‐dioxydiacetate (PDDA) Ligand |
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| Authors: | Thomas Behrsing Glen B Deacon Peter C Junk Brian W Skelton Alexandre N Sobolev Allan H White |
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| Institution: | 1. School of Chemistry and Centre for Green Chemistry, Monash University, Clayton, Victoria 3800, Australia;2. School of Pharmacy and Molecular Sciences, James Cook University, Townsville, Queensland, 4811, Australia;3. School of Chemistry and Biochemistry, M313, The University of Western Australia, Crawley, Western Australia 6009, Australia;4. Present address: Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Crawley, Western Australia 6009, Australia |
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| Abstract: | Reaction of LnCl3 with Na2(PDDA) (PDDA = phenylene‐1, 2‐dioxydiacetate) in a 1 to 2 mol ratio in aqueous solution yielded Ln2(PDDA)3(H2O)6] · 2H2O, structurally characterized for Ln = Ce ( 1 ), Sm ( 2 ) (redetermination), Tb ( 3 ) and Y ( 4 ) in a monoclinic C2/c array, a second related structural form orthorhombic, Pbcn] being obtained for Tb ( 5 ), Ho ( 6 ) and Er ( 7 ). The ‘domains of existence' of these two previously described forms are now extended to Ce–Dy, Y, and Eu–Er, respectively. Reaction under the same conditions for the heavier Yb3+ ion yielded Yb2(PDDA)3(H2O)6](∞|∞) · 4H2O ( 8 ), orthorhombic, Pbca. In the case of Ln = La the bimetallic species NaLa(PDDA)2(H2O)2](∞|∞) · 4H2O ( 9 ) was obtained, while reaction of LnCl3 with Na2(PDDA) in a 1 to 3 mol ratio led to the isolation of the isotypic (monoclinic, P21/c) NaLn(PDDA)2(H2O)2](∞|∞) · 4H2O) for Ln = Ce ( 10 ) and Sm ( 12 ). With the smaller Ln = Yb, the more definitively bimetallic NaYb(PDDA)2(H2O)2](∞|∞) · 3H2O ( 13 ) (triclinic, P$\bar{1}$ )) was obtained, the trihydrate solvation ascribed differing from that recorded (dihydrate) in a cosynchronous report. |
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| Keywords: | Rare Earth Carboxylate Phenylene‐1 2‐dioxydiacetate Structure elucidation |
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