Crystal structures of Cd(ReO4)2 · 4Urea, Cd(ReO4)2 · 6Urea and Ca(ReO4)2 · 5Urea. Synthesis and characterization of urea adducts from the systems M(ReO4)2-Urea-H2O, M = Ca, Sr, Ba, Pb and Cd

Selective modification of the metal coordination environment in heavy alkaline–earth iodide complexes

The controlled formation of group 2 coordination complexes involves issues of metal acidity, ligand basicity, solvent effects, and steric pressure.