European Journal of Inorganic Chemistry

A mild approach, atmospheric pressure metalorganic chemical vapor deposition (AP-MOCVD), was applied for the fabrication of pompon-like assemblies of MnF₂ nanorods. Mn(hfa)₂·tmeda [(Hhfa = 1,1,1,5,5,5-hexafluoro-2,4-pentandione, tmeda = N,N,N′,N′-tetramethylethylenediamine)] was used as a single-source precursor.

A family of four tris(2-phenylpyridine)-based Ir^III complexes with hemicaged or open (without capping unit but with similar functional groups on the ligand) structure are reported. Within the context of the parent tris(2-phenylpyridine) and the full-cage iridium(III) complexes, structure–photoluminescence quenching relationships (SPQR) of the four complexes have been investigated.

A series of porphyrin–triphenylamine (TPA) conjugates have been characterized by spectral and electrochemical methods. Due to the antenna effect of these conjugates, the fluorescence intensity was enhanced. The oscillator strength increases as the number of TPA substituents increases for the charge-transfer band in the near-IR region upon porphyrin-ring oxidation.

The geometrical parameters and magnetic properties of structurally interesting metal–organic macrocycles {[Cu₄(L)₂]·xS and [Cu₄(L)₂(H₂O)₂]·xS} can be varied drastically by changing the crystallization solvent. Six novel structures are reported along with their calculated magnetic coupling constants.

Gas-phase addition of a basic ligand to dipositive uranyl coordination complexes comprising diacetone alcohol results in dehydration to produce mesityl oxide. A novel attribute of this process is that a ligandexothermically associates to a coordination complex, providing excitation to induce chemistry in other ligands; the added “spectator ligand” remains intact.

Silver(I) amino-arenesulfonate complexes of the formula [Ag(O₃SR)]_∞ were formed through treatment of a variety of amino-arenesulfonic acids with Ag₂O in water. Crystal structure analysis on four complexes indicate 1D chains and 2D and 3D networks depending on the nature and position of the amino (or N) substituent. FTIR and MS studies suggest all the complexes are polymeric in the solid state.

CO-releasing molecules are important as therapeutic agents and pharmaceuticals. Light-triggered CO release can be achieved for iron-containing carbonyl complexes stabilized with aminoethylthiolate or related bases, whereas homologous ruthenium derivatives are stable when exposed to visible light. These complexes capture neutral Lewis bases through N–H···O hydrogen bridges.

The chelating and spectroscopic properties of pyrone and pyridinone derivatives, tropolone and catechol (which form very effective antidiabetic compounds) towards the VO²⁺ ion are explained in terms of aromaticity of the fully deprotonated form of the ligands, and of total electric charge on the oxygen donors.

Structural variation of the trifluoromethylated enaminone building block gave rise to new bidentate and tetradentate ligands that bear redox-active units (anthracene, azobenzene and tetrathiafulvalene). Their coordination chemistry with copper(II), structural characterization, redox chemistry and UV/Vis properties of the ligands and complexes have been investigated.

The lowest energy Fe₄(CS)₄(CO)₁₂ structures have a central Fe₃ triangle with an exotriangular iron atom joined to the Fe₃ triangle by a four-electron donor “end-on” CS bridge. An Fe₄ rhombus bridged by a six-electron donor η²-μ₄-CS group is found in the lowest energy structures of Fe₄(CS)₄(CO)₁₀ and Fe₄(CS)₄(CO)₉ and makes Fe₄(CS)₄(CO)₁₀ viable enough to be a promising synthetic objective.

Ferrocenylmaleimides are accessible by bromine shift and oxidation with subsequent Negishi ferrocenylation of dibromo-N-methylpyrrole. Electrochemical and spectroelectrochemical studies highlight their redox and electron-transfer properties. Additionally, the ferrocenylmaleimides show a significant solvatochromic behavior.

Not (only) the available second-ring N atom of pyrazole and pyrazolate ligands in complexes of Pt^II appears to be the preferred Ag⁺ binding site in moderately acidic aqueous solution, but rather the C4 atom and/or the C4,C5 double bond.

The coordination preferences of the tetradentate Schiff base N,N′-ethylenebis(4-iminopentan-2-one), H₂L, with Et₂Zn under various stoichiometries were investigatedand the reactivity of the resultant products was explored. These reactions afforded a series of di-, tetra- and polynuclear zinc complexes.

The structure of [Nb(η⁵-C₅H₄SiMe₃)₂(H)₃] (1) justifies its classification as a “nonclassical” transition metal hydride. Complex 1 is an initiator for the ROP of lactones. A mechanism consisting of an interaction between the lactone carbonyl group and the metal, insertion of the lactone into the Nb–H bond, and the generation of a metal alkoxide–aldehyde propagating species has been proposed.