Structural investigations of calcium binding molecules. III. Calcium-oxydiacetic acid system. Crystal and molecular structures of calcium oxydiacetate hexahydrate and Raman spectroscopic comparison with species in aqueous solution

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).…”

The crystal and molecular structures of lithium hydrogen oxydiacetate

“…In the alkali hydrogen oxydiacetates so far investigated the anion has been almost planar and the oxydiacetate ions are linked by short hydrogen bonds into infinite chains. The planar oxydiacetate ion is also found in the lanthanoid compounds (Albertsson, 1972), in Ca oxydiacetate (Uchtman & Oertel, 1973) and in two phases of Cd oxydiacetate (Boman, 1974). In a third phase of CdOXY, however, as well as in the monoclinic oxydiacetic acid, the oxydiacetate group is strongly twisted.…”

Polycarboxylic acids containing acetal functions: calcium sequestering compounds based on oxidized carbohydrates

“…The main difference is that the central oxygen atom is a part of an acetal instead of a true ether function. This, as well as extra internal steric repulsion in -OOCCHOCHCOO--Ca complexes, may disturb the ideal flat conformation as found for the ODA-Ca complex (9).…”