Grignard reagents as deprotonation agents for oxazoline-amido-phenolate ligands: structural and catalytic implications with the role of halogen ions.

In this study, various halogen-substituted Grignard reagents were assessed as deprotonating agents for the oxazoline-amido-phenolate ligand, leading to the formation of magnesium complexes. The newly synthesized complexes with halogen substituents displayed three distinct coordinative modes, all extensively characterized through crystallographic methods. The introduction of halogen substituents induced changes in the Lewis acid properties of the complexes, thereby impacting their structural attributes and catalytic behavior during the initiation and propagation of ring polymerization of cyclic esters.

Luminescent Pt(II) Complexes Containing (1-Aza-15-crown-5)dithiocarbamate and (1-Aza-18-crown-6)dithiocarbamate: Mechanochromic and Solvent-Induced Luminescence.

The strong tendency to stack in the solid state and rich luminescence for the Pt(II) complexes makes them potential candidates as new mechanochromic materials and sensing applications. Six mononuclear complexes [Pt(ppy)(ONCS)] (), [Pt(bpy)(ONCS)]ClO (), [Pt(ppy)(ONCS)] (), [Pt(phen)(ONCS)]ClO·CHOH (), [Pt(phen)(ONCS)]ClO (), and [Pt(phen)(ONCS)]ClO (), one dinuclear complex [Pt(phen)(NaONCS)(ClO)]ClO (), and one one-dimensional (1-D) coordination polymer {[Pt(bpy)(NaONCS)(ClO)](ClO)} () were synthesized by reacting [Pt(ppy)Cl], Pt(bpy)Cl, and Pt(phen)Cl (ppy = 2-phenylpyridine, bpy = 2,2'-bipyridine, and phen = 1,10-phenanthroline) with (1-aza-15-crown-5)dithiocarbamate (ONCS) or (1-aza-18-crown-6)dithiocarbamate (ONCS), respectively, which have been isolated and structurally characterized by X-ray diffraction. Neutral complexes and contain no intermolecular Pt(II)···Pt(II) contact, whereas cationic complexes , , , and with ClO as counteranions show alternative intermolecular Pt(II)···Pt(II) contacts of 3.

Factors influencing the preparation of supported iron oxide in fluidized-bed crystallization.

Our previous work applied a novel supported iron oxyhydroxide (FeOOH) catalyst to effectively treat benzoic acid by hydrogen peroxide. The FeOOH catalyst was prepared via the oxidation of Fe2+ by H2O2 in the acidic condition using a fluidized-bed crystallization reactor. The major components coated on the surface were identified as amorphous FeOOH and gamma-FeOOH.