Hydrothermal syntheses and characterization of phenyl- and benzyl-phosphonates and ethylene- and propylene-diphosphonates of cobalt(II), ACo(O3PR)2·xH2O and ACo(O3P-R-PO3)·2H2O (A = Ca, Sr, Ba; R = Ph, CH2Ph, -CH2CH2-, -CH2CH2CH2-)

Phenyl- and benzyl-phosphonates and ethylene- and propylene-diphosphonates of cobalt(II) have layered and pillared-layered structures, respectively.295