Synthesis and crystal structure of the potassium ytterbium complex with triethylenetetraaminehexaacetic acid: [K3Yb(TTHA)(H2O)5]

The title complex [K3Yb(TTHA)(H2O)5], where TTHA6− is triethylenetetraaminehexaacetic acid anion was synthesized in aqueous solution, and its crystal structure was determined by X-ray diffraction. In the complex, the ytterbium ion is coordinated by four nitrogen atoms and five carboxyl oxygen atoms of the same TTHA6− anion. The coordination number of the ytterbium ion is 9, and its coordination polyhedron can be described as a distorted monocapped square antiprism. Each Yb(TTHA)3− is further connected by K+ ions through carboxyl groups of TTHA6− ion to form a three dimensional network structure.