catena-Poly[[bis-(3-methyl-benzoato-κO,O')lead(II)]-μ-4,4'-bipyridine-κN:N']

μ-Oxido-bis-[bis-(phenanthroline-κN,N')(sulfato-κO)iron(III)] octa-hydrate

The title complex, [Fe₂O(SO₄)₂(C₁₂H₈N₂)₄]·8H₂O, contains two unique Fe^III cations, one oxide anion, four 1,10-phenanthroline (phen) ligands, two coordinated sulfate anions and eight lattice water mol­ecules. Each Fe^III ion has an approximate octa­hedral geometry, coordinated by four N atoms from two phen mol­ecules, two O atoms from oxide and sulfate anions, respectively. The parallel phen mol­ecules form two-dimensional supermolecules through π–π stacking inter­actions [centroid–centroid distances = 3.684 (3), 3.711 (3), 3.790 (3), 3.847 (3), 3.746 (3), 3.732 (3) and 3.729 (3) Å]. This architecture is further stabilized by O—H⋯O hydrogen bonds involving the lattice water mol­ecules and sulfate O atoms.

Bis[N-(pyridin-2-ylcarbon-yl)pyridine-2-carboxamidato]iron(III) perchlorate monohydrate

The structure of the title salt complex, [Fe(C₁₂H₈N₃O₂)₂]ClO₄·H₂O, contains one Fe^III cation, two N-(pyridin-2-ylcarbon­yl)pyridine-2-carboxamidate (bpca⁻) anions, one perchlorate anion and one water mol­ecule. The Fe^III cation has an approximate octa­hedral geometry, defined by six N atoms from two bpca⁻ anions. The nearly parallel [dihedral angle = 1.50 (1)°] bpca⁻ anions form two-dimensional supermolecules along the a axis by the way of weak π–π stacking inteactirons [centroid–centroid distances = 3.948 (2), 4.000 (2), 3.948 (2), 3.911 (2), 3.897 (2), 3.984 (2) and 3.929 (2) Å]. Intra- and inter­molecular C—H⋯O hydrogen bonding occurs. The water mol­ecule [occupancies 0.520 (5) and 0.480 (5)], two carbonyl O atoms [occupancies 0.622 (7) and 0.378 (7)] and the four perchlorate O atoms [occupancies 0.887 (4) and 0.113 (4)] are each disordered over two positions.