Add time:08/19/2019         Source:sciencedirect.com

In the monohydrate Pr(OOC-Ph-NH2)3(H2O) (1), Pr3+ is nine-coordinate with only oxygen atoms coordinating. Two carboxylate groups are bidentate-bridging, four are tridentate-bridging and there is one coordinating water molecule, hence the coordination number is nine. The chains run along [0 1 0]. In the anhydrous Pr(OOC-Ph-NH2)(OOC-Ph-NH) (2), the central Pr3+ ion is surrounded by six oxygen atoms and two nitrogen atoms in a distorted square antiprism. These polyhedra are connected to each other via two opposite O–O edges to form chains running parallel [0 0 1]. The chains, in which all carboxylate groups are tridentate-bridging, are arranged in a centered rectangular fashion and are further connected via OOC-Ph-NH bridging.

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