Poly[tetra­deca­aqua­tetra­kis­(μ3-imidazole-4,5-dicarboxyl­ato)hexa-μ3-sulfato-cobalt(II)hexa­samarium(III)]

In the title three-dimensional compound, [CoSm6(C5H2N2O4)4(SO4)6(H2O)14]n, the CoII ion is six-coordinated with two O atoms and two N atoms from two imidazole-4,5-dicarboxyl­ate ligands and two coordinated water mol­ecules, giving a slightly distorted octa­hedral geometry. One SmIII ion is eight-coordinated in a bicapped trigonal–prismatic coordination geometry by four O atoms from two imidazole-4,5-dicarboxyl­ate ligands, two O atoms from two SO4 2− anions and two coordinated water mol­ecules. The other two SmIII ions are nine-coordinated in a tricapped trigonal–prismatic coordination geometry; one of these SmIII ions is bonded to four O atoms from two imidazole-4,5-dicarboxyl­ate ligands, three O atoms from three SO4 2− anions and two water O atoms, and the other SmIII ion is coordinated by one O atom and one N atom from one imidazole-4,5-dicarboxyl­ate ligand, five O atoms from three SO4 2− anions, as well as two coordinated water mol­ecules. The crystal structure is further stabilized by N—H⋯O, O—H⋯O, and C—H⋯O hydrogen-bonding inter­actions

Poly[[(μ2-acetato-κ3 O,O′:O′)aqua­bis­(μ3-isonicotinato-κ3 O:O′:N)samarium(III)silver(I)] perchlorate]

The title compound, {[AgSm(C6H4NO2)2(CH3CO2)(H2O)]ClO4}n, is a three-dimensional heterobimetallic complex constructed from a repeating dimeric unit. Only half of the dimeric moiety is found in the asymmetric unit; the unit cell is completed by crystallographic inversion symmetry. The SmIII ion is eight-coordinated by four O atoms of four different isonicotinate ligands, three O atoms of two different acetate ligands, and one O atom of a water mol­ecule. The two-coordinate AgI ion is bonded to two N atoms of two different isonicotinate anions, thereby connecting the disamarium units. In addition, the isonicotinate ligands also act as bridging ligands, generating a three-dimensional network. The coordinated water mol­ecules link the carboxyl­ate group and acetate ligands by O—H⋯O hydrogen bonding. Another O—H⋯O hydrogen bond is observed in the crystal structure. The perchlorate ion is disordered over two sites with site-occupancy factors of 0.560 (11) and 0.440 (11), whereas the methyl group of the acetate ligand is disordered over two sites with site-occupancy factors of 0.53 (5) and 0.47 (5)