Poly[tris­(dimethyl­formamide)(μ₃-2,4,6-triiodobenzene-1,3,5-tricarboxyl­ato)samarium(III)]

In the title compound, [Sm(C₉I₃O₆)(C₃H₇NO)₃]_n, the Sm^III atom is coordinated by nine O atoms, viz. six carboxyl­ate O atoms from three 2,4,6-triiodobenzene-1,3,5-tricarboxyl­ate (I₃BTC) ligands and three O atoms from three N,N-dimethyl­formamide (DMF) mol­ecules. Each I₃BTC ligand bridges three Sm^III atoms, generating a three-dimensional metal-organic framework structure. The asymmetric unit contains one Sm^III ion and one I₃BTC anion, both situated on a threefold axis, and one DMF mol­ecule in a general position.

1-[6-(3,5-Di­methyl­pyrazol-1-yl)-1,2,4,5-tetra­zin-3-yl]guanidin-2-ium perchlorate methanol monosolvate

In the title solvated salt, C₈H₁₂N₉⁺·ClO₄⁻·CH₃OH, the dihedral angle between the tetra­zine and pyrazole rings is 26.05 (7)°. The two N atoms bonded to the 1,2,4,5-tetra­zine ring deviate from the plane defined by its four N atoms by 0.234 (2) and 0.186 (2) Å. There is an intra­molecular N—H...N hydrogen bond between the protonated guanidine fragment and one of the tetra­zine N atoms. In the crystal, two cations and two perchlorate anions are connected via N—H...O hydrogen bonds into centrosymmetric assemblies. These assemblies are further linked into a two-dimensional network parallel to (100) via bifurcated O—H...(N,N) hydrogen bonds formed with the bridging methanol mol­ecules.