Crystal Structure of Dimeric Tetraquadipyridinioacetateytterbium(III) Perchlorate [Yb(C5H5NCH2CO2)2.4(H2O) ]2.(Cl04 )6

Department of Chemistry, Lanzhou University, Lanzhou 730000, China
Department of Biology, Lanzhou University, Lanzhou 730000, China
Manuscript received 16 April 1997, accepted 19 September 1997

The title complex ilimeric tetraquadipyridinioacatateytterbium perchlorate ([Yb{C₅H₅NCH2COO)₂.4(H₂O)]₂.(ClO₄)₆) has been prepared by reacting ytterbium perchlorate with pyridine betaine (pyridinioacetate) in warm water and its X-ray crystal structure has been determined. The ytterbium(III) ion is surrounded by four carboxylato O atoms and four aqua-ligands in an eight-coordinate approximate dodecahedral arrangement. The average Yb-O (aqua), Yb-O (carboxylato) bond distances are 2.366(3) and 2.283{3) \(\mathring{A}\) respectively.