S. Boudreau, H. Haendler
Feb 1, 1981
Citations
0
Influential Citations
3
Citations
Journal
Journal of Solid State Chemistry
Abstract
Abstract Tris(ortho-aminobenzoato)aquoyttrium(III), Y(H2NC6H4COO)3 · H2O, crystallizes in the monoclinic space group, C2 c , with eight molecules in a unit cell of dimensions: a = 30.89(1) A, b = 9.09(1) A, c = 14.85(1) A, and β = 109.3(1)°. The structure was determined using three-dimensional X-ray diffraction data gathered on multiple-film equi-inclination, integrated Weissenberg, and precession photographs taken about two crystal axes. The structure, excluding the hydrogen atoms, was solved from Patterson and electron density maps and refined by least-squares methods to a final R of 0.081. The coordination about the yttrium atom is sevenfold, best described by a capped trigonal prism. Each ortho-aminobenzoate ligand acts as a bridging bidentate ligand, resulting in six ortho-aminobenzoate residues coupled to each yttrium atom. The water molecule occupies the seventh position. This bonding configuration generates a structure in which each yttrium atom in (100) is attached to two other yttrium atoms via carboxylate bridges to give parallel sets of polymeric chains coincident with (100). It is suggested that this polymeric character accounts for the extreme insolubility of Y(H2NC6H4COO)3 · H2O.