Synthesis and characterization of Co(II), Cu(II) and Zn(II) complexes with 1,1-cyclobutanedicarboxylic acid

Polycrystalline complexes of Co(C6H6O4) · 2H2O, Cu(C6H6O4), and Zn2(C6H6O4)2 · 3H2O were synthesized. The complexes were characterized by elemental analysis, IR spectroscopy, thermal analysis (TG, DSC/DTA, and TG-FTIR) and X-ray analysis. During recrystallization, single crystals of [Co2(C6H6O4)2(H2O)3] and [Cu(C6H6O4)H2O] were obtained.