Two novel bimetallic transition metal–uranyl one-dimensional coordination polymers with manganese(II) and cobalt(II) incorporating bridging diglycolate (2,2′-oxydi­acetate) ligands

Novel uranyl bimetallic one-dimensional coordination polymers containing cobalt and manganese have been synthesized and structurally analyzed via X-ray diffraction techniques. The local and global structures of the two compounds have been compared and their photoluminescence properties have been analyzed.

Mol­ecular structures of 3-[(2,2,3,3-tetra­fluoro­prop­oxy)meth­yl]- and 3-[(2,2,3,3,3-penta­fluoro­prop­oxy)meth­yl]pyridinium saccharinates

Two saccharinate salts of pyridinium with –CH₂OCH₂CF₂CF₂H and –CH₂OCH₂CF₂CF₃ meta substituents were investigated crystallographically in order to compare their fluorine-related weak inter­actions in the solid state. Both salts demonstrate a stable synthon formed by the pyridinium cation and the saccharinate anion, in which a seven-membered ring reveals a double hydrogen-bonding pattern.

M³⁺(H₂AsO₄)(H₂As₂O₇) (M³⁺ = Al, Ga) and In₂(H₂AsO₄)₂(H₂As₂O₇)₂: a new layer structure type and a new framework structure type containing the rare H₂As₂O₇²⁻ group

The new sheet structures of Al(H₂AsO₄)(H₂As₂O₇) and isotypic Ga(H₂AsO₄)(H₂As₂O₇) and the new framework structure of In₂(H₂AsO₄)₂(H₂As₂O₇)₂ represent the first compounds containing both H₂AsO₄⁻ and H₂As₂O₇²⁻ groups.

2,2′-[(Disulfanediyl)bis­{5-[(1E)-(2-hy­droxy­benzyl­idene)amino]-1,3-thia­zole-4,2-di­yl}]diphenol: synthesis, crystal structure and calculation of molecular hyperpolarizability

The synthesis and crystal structure of a novel Schiff base compound obtained from salicyl­aldehyde and di­thio­oxamide has been investigated. A one-dimensional chain is formed along the b axis via double inter­molecular C—H⋯S hydrogen bonds. DFT calculations have allowed the molecular hyperpolarizability to be evaluated.

Copper(II) bromide, nitrate and perchlorate com­plexes with sterically demanding N-(6-methyl­pyridin-2-yl)acetamide ligands

Copper(II) complexes with N-(6-methyl­pyridin-2-yl)acetamide ligands exhibit different five-coordinate environments around the Cu^II ion, depending on the nature of the counter-ions.

Crystal structure and spectroscopic characterization of a cobalt(II) tetra­aza­macrocycle: completing a series of first-row transition-metal complexes

A crystallographic, spectroscopic and computational study of [Co^IICl(TMC)]⁺ (TMC is 1,4,8,11-tetra­methyl-1,4,8,11-tetra­aza­cyclo­tetra­deca­ne) fills a gap in the series of crystallographically characterized [M^IICl(TMC)]⁺ complexes (M = Mn, Fe, Ni, Zn). The unusually large effective magnetic moment of [Co^IICl(TMC)]⁺ is consistent with large spin orbit coupling inter­actions.

Chiral bis­(mandelato)borate salts for resolution via metathesis crystallization

The preparation and structures of three simple salts of the bis­[(R)-mandelato]borate anion that could be used for the resolution of racemic cations by metathesis crystallization are reported.

Origin of the chemical stability of phosphine-phospho­ramidites: structural study of an UPPhos-type crystal and application of UPPhos in the asymmetric hydrogenation of imines

Structure elucidation of a single crystal of a new phosphine–phospho­ramidite (PPA) revealed unique features which might have a significant effect on the excellent chemical stability of this type of mol­ecule. The conformation of the molecule provides an optimal chelating structure.

Intricacies of ligand coordination in tri­carbonylchromium(0) complexes with ortho- and para-fluoro­biphenyls

Solid-state geometries of [(η⁶-C₆H₅)(2-F-C₆H₄)]Cr(CO)₃ and [(η⁶-C₆H₅)(4-F-C₆H₄)]Cr(CO)₃ indicate exclusive coordination of the metal center to the more electron-rich arene ring. Unlike the structures of the free ligands, the chromium complexes exhibit no crystallographic symmetry and no positional disorder.

Syntheses, structures and characterization of isomorphous Co^II and Ni^II coordination polymers based on 2-[(1H-imidazol-1-yl)meth­yl]-6-methyl-1H-benz­imidazole and benzene-1,4-di­carboxyl­ate

Two new isostructural one-dimensional coordination polymers based on 2-[(1H-imidazol-1-yl)meth­yl]-6-methyl-1H-benzimidazole (immbb) and benzene-1,4-di­carboxyl­ate have been prepared and structurally characterized. In each of the polymers, Co^II or Ni^II ions are linked by bridging benzene-1,4-di­carboxyl­ate ligands to generate a one-dimensional chain, with immb ligands pendant on opposite sides of the chain.