Synthesis and X-ray Structure of the Novel Polymeric Lanthanum(III) 2,2‘-Oxydiacetate [La₂(C₄H₄O₅)₃(H₂O)₃·5H₂O]_n

Abstract

The synthesis and X-ray structure of the novel polymeric lanthanum(III) oxydiacetate complex [La2(C4H4O5)3(H2O)3·5H2O] n (1) is reported. One metal ion is coordinated to three tridentate oxydiacetate ligands, the other, to six outer carboxylate oxygens and three oxygens from metal-bound water molecules. The crystal structure of 1 shows it to be a three-dimensional polymer where the lanthanum centers are bridged by the carboxylate groups of the oxydiacetate ligands. Upon thermolysis 1 is converted into hexagonal La2O3.

Triaqua(oxydiacetato-O,O',O'')strontium(II) Monohydrate

“…Among related carboxylate ligands, oxydiacetate (oda; -O2CCH2OCH2CO2-) has been shown to be a good complexing agent for a variety of metal ions. Structural data of hydrated oda complexes have been reported with cadmium(H) (Boman, 1977a,b,c), calcium(H) (Uchtman & Oertel, 1973), copper(II) (Whitlow & Davey, 1975), erbium(III) (Elding, 1977), lanthanum(HI) (Baggio, Garland, Perec & Vega, 1996), zinc(II) and zirconium(IV) (Baggio, Garland, Perec & Vega, 1995), and different types of structures with the ligand bonded in mono-, bi-and tridentate modes have also been observed. The results of the present study include the preparation, characterization and X-ray structure determination of the novel polymeric strontium complex [Sr(C4H4Os)(H20)3 ]n.nH20, (1).…”

Synthesis, structure and magnetic properties of the 2,2′-oxydiacetato-bridged Cu(II)–Ln(III) complexes [{Cu3Ln2(oda)6(H2O)6}·12H2O]n (Ln = Y, Gd, Eu, Nd, Pr)

“…23 Our previous work on the complexing properties of 2,2Јoxydiacetato [oda = O(CH 2 CO 2 ) 2 2Ϫ ] towards yttrium() and lanthanide() elements has highlighted its versatility as a connecting ligand in various homo-and hetero-metallic extended solids, with the metal centers bridged by carboxylate ligands only. [24][25][26] The design strategy of combining the [Ln(oda) 3 ] 3Ϫ building blocks with tripositive Ln 3ϩ metal ions is now used with divalent Cu() to obtain the Cu()-Ln() heterometallic complexes [{Cu 3 Ln 2 (oda) 6 (H 2 O) 6 }ؒ12H 2 O] n (Ln = Y, Gd, Eu, Nd, Pr). Recent studies by Mao et al [27][28][29] reported on the characterization of the similar polymers Cu 3 Ln 2 (oda) 6 (H 2 O) 6 ؒnH 2 O (Ln = Nd, 27 Gd, 28 n = 3; Er, 27 Yb, 29 n = 0).…”

Self-assembly of a 2-D barium/thiodiacetate coordination polymer in aqueous solution

“…Di-and polycarboxylate ligands in particular have shown to be useful synthetic building blocks for metal-organic-based coordination polymers [2][3][4]. For example, coordination polymers of transition, alkaline earth, and lanthanide metals with oxydiacetate (oda, OðCH 3 COOÞ 2À 2 ) and thiodiacetate (tda, SðCH 3 COOÞ 2À 2 ) spontaneously self-assemble in aqueous solution [5][6][7][8][9][10][11][12]. Furthermore, the aqua ligands of M nþ /X(CH 3 COO) 2 coordination polymers (X ¼ O or S) are labile, resulting in a rich substitution chemistry [5,6,13].…”