Pb(ReO4)2(C2H6O2)1.5: A New Contribution to the Crystal Chemistry of Perrhenates


  • In Memory of Professor Hans-Georg von Schnering


The title compound Pb(ReO4)2(C2H6O2)1.5 was prepared by recrystallization of the anhydrous lead perrhenate in ethane-1,2-diol (ethylene glycol). The colorless compound crystallizes in the monoclinic space group P21/n (No. 14) with four formula units per unit cell a = 12.668(1) Å, b = 7.572(1) Å, c = 13.263(1) Å, β = 110.216(3)°. The lead ion is nine fold coordinated in a spatial arrangement described as a capped cubic antiprism. The coordination polyhedra are interconnected by [ReO4] units, building a two dimensional framework, which are bridged by ethylene glycol molecules generating a tridimensional network. The compound loses the ethane-1,2-diol molecules in two steps at temperatures below 450 K and decomposes at 800 K.