Different structural types of hetero-metal bis(citrato)germanates with 1,10-phenanthroline: Targeted synthesis, spectral, thermal properties and Hirshfeld surface analysis

The present study describes synthesis, characteristic and structural determination of different type of complexes formed in systems GeO2–H4Cit–X–phen–C2H5OH–H2O (where X is Cu(CH3COO)2, Cu(NO3)2, Zn(CH3COO)2, Zn(NO3)2, ZnCl2; H4Cit is citric acid; phen is 1,10-phenanthroline) depending on the anion of the initial 3d-metal salt. The complex compounds [Cu(phen)2Ge(Cit)2Cu(phen)2]·13H2O·C2H5OH·CH3OH (1), [Cu(H2O)(phen)2]2[{Ge(HCit)2}(NO3)2]·4H2O...