Hydrothermal synthesis and structural characterization of a novel gadolinium(III) coordination polymer [Gd(Hdtpc)(OH)(H2O)]n

Hydrothermal reaction of Gd2O3 with orotic acid (2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid, H3dtpc) yielded a novel polymeric complex [Gd(Hdtpc)(OH)(H2O)]n (1) possessing the three-dimensional network constructed by eight-coordinate Gd(III) centers. The whole structure of 1 can be viewed as Gd(III) chains linked by orotate spacers. Crystallographic data for the complex: orthorhombic, space group Pna21, a=10.0654(10), b=16.5208(17), c=4.6223(5) Å, V=768.64(14) Å3, Z=4, Dc=2.993 gcm−3.