First crystal structure of an Fe(III) anionic complex based on a pyruvic acid thiosemicarbazone ligand with Li: synthesis, features of magnetic behavior and theoretical analysis.

The iron(III) anionic complex based on a pyruvic acid thiosemicarbazone ligand with the lithium cation Li[Fe(thpy)]·3HO (1) has been synthesized and characterized by FTIR spectroscopy, powder and single crystal X-ray diffraction, direct current magnetic susceptibility measurements, and Fe Mössbauer spectroscopy. Moreover, the molecular structure of the [Fe(thpy)] anion has been determined for the first time. The [Fe(thpy)] units in the triclinic 1̄ lattice of 1 are assembled into layers parallel to the plane.

[M(Hdapsc)]-[Cr(CN)] (M = Mn, Co) Chain and Trimer Complexes: Synthesis, Crystal Structure, Non-Covalent Interactions and Magnetic Properties.

Four new heterometallic complexes combining [M(Hdapsc)] cations with the chelating Hdapsc {2,6-diacetylpyridine-bis(semicarbazone)} Schiff base ligand and [Cr(CN)] anion were synthesized: {[M(Hdapsc)]Cr(CN)K(HO)(EtOH)}·1.2(HO), M = Mn () and Co (), {[Mn(Hdapsc)]Cr(CN)(HO)}Cl·HO () and {[Co(Hdapsc)]Cr(CN)(HO)}Cl·2EtOH·3HO (). In all the compounds, M(II) centers are seven-coordinated by NO atoms of Hdapsc in the equatorial plane and N or O atoms of two apical -CN/water ligands.

A Series of Novel Pentagonal-Bipyramidal Erbium(III) Complexes with Acyclic Chelating Schiff-Base Ligands: Synthesis, Structure, and Magnetism.

A series of six seven-coordinate pentagonal-bipyramidal (PBP) erbium complexes, with acyclic pentadentate [] Schiff-base ligands, 2,6-diacetylpyridine bis-(4-methoxybenzoylhydrazone) [HDAPMBH], or 2,6-diacethylpyridine bis(salicylhydrazone) [HDAPS], and various apical ligands in different charge states were synthesized: [Er(DAPMBH)(CHOH)Cl] (); [Er(DAPMBH)(HO)Cl]·2CHOH (); [Er(DAPMBH)(CHOH)Cl] (); [Er(DAPMBH)(CHOH)(N)] (); [(EtH)N][Er(HDAPS)Cl] (); and [(EtH)N][Y.Er.(HDAPS)Cl] ().

Peculiar Spin-Crossover Behavior in the 2D Polymer K[Fe(5Cl-thsa)].

A potassium salt of the NSO-coordination Fe(III) anion K[Fe(5Cl-thsa)] () (5Cl-thsa - 5-chlorosalicylaldehyde thiosemicarbazone) is synthesized and characterized structurally and magnetically over a wide temperature range. Two polymorphs of salt characterized by the common 2D polymer nature and assigned to the same orthorhombic space group have been identified. The molecular structure of the minor polymorph of was solved and refined at 100, 250, and 300 K is shown to correspond to the LS configuration.