Hydrothermal Synthesis and Crystal Structure of Lanthanum Orotate Supermolecule with A Honeycomb Structure Constructed from Mononuclear Molecules via Hydrogen Bonds

• Published in: Journal of rare earths Vol. 25; no. 6; pp. 770 - 774
• Main Author: 李艳秋 鞠艳玲 李夏 张婷婷 王春燕 余京波
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2007; Department of Chemistry,Capital Normal University,Beijing 100037,China
• Subjects: crystal structure; hydrothermal synthesis; lanthanum complex; O614.33; O641.4; orotic acid; rare earths; 晶体结构; 水热合成; 镧元素; hydrothermal synthesis; lanthanum complex; crystal structure; O614.33; O641.4; orotic acid; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(08)60022-8

A new complex of lanthanum orotate [La（C5H3N2O4）2（OH）（H2O）6 ]·2（C5H4N2O4）·9H2O was synthesized using a hydrothermal method. The crystal structure was determined with help of single crystal X-ray diffraction analysis. The complex crystallized in orthorhombic system, Cmc2（1） space group. In the complex, the center lanthanum （Ⅲ） ion was nine-coordinated with coordination geometry of a distorted monocapped square antiprism, in which two of the nine coordinated oxygen atoms were from two orotate ligands in a monodentate mode, one oxygen atom from a hydroxyl, and the others from six coordinated water molecules. The mononuclear complex [La（C5H3N2O4）2（OH）（H2O）6 ]·2（C5H4N2O4）·9H2O was linked through the hydrogen bonds into an infinite supermolecular honeycomb structure.