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 TTHA^6- 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 TTHA^6- ion to form a three dimensional network structure.