The crystal structure of potassium trioxalatogermanate(IV) monohydrate

Abstract

Two independent tris-chelate anions are present in K₂[Ge(C₂O₄)₃]·H₂O with crystallographic symmetry C₂ and approximate symmetry D₃. The Ge–O bond lengths and chelate O–Ge–O angles are all close to their average values of 1.882 Å and 85.6°, respectively. Potassium ions in irregular eight-fold co-ordination link the anions in three dimensions (K–O 2.72–3.04 Å).The crystals are monoclinic, space group C2/c, a= 9.918(8), b= 17.53(1), c= 15.41(1)Å, β= 104.2(1)°, Z= 8, and R= 0.068 for 1 555 film data (Cu radiation).