zirconium/dichloromethane

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Evaluation of new surfactant expanded zirconium and titanium phosphates for polycyclic aromatic hydrocarbons extraction from waters.

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A newly synthesized family of materials prepared with surfactant as organic template were tested for the extraction of polycyclic aromatic hydrocarbons (PAHs) from water, using pyrene (Pyr) and benzo[a]pyrene (B[a]P) as PAHs representatives. Particular attention was paid to the evaluation of the

The zirconium alkoxide-catalyzed aldol-Tishchenko reaction of ketone aldols.

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The aldol-Tishchenko reaction of ketone aldols as enol equivalents has been developed as an efficient strategy to furnish differentiated 1,3-anti-diol monoesters in one step. The thermodynamically unstable ketone aldols undergo a facile retro-aldolization to yield a presumed zirconium enolate in

Atom-efficient electrophilic aromatic nitration by dinitrogen pentoxide catalysed by zirconium(IV) 2,4-pentanedionate.

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An atom-efficient, non-acidic, catalytic process is described for the nitration of electron deficient arenes such as o-nitrotoluene using a dinitrogen pentoxide-zirconium(iv) 2,4-pentanedionate system in dichloromethane solvent. Kinetic studies showed the nitration process to be first-order with

Mass spectrometric investigation of gallium and zirconium complexes with octaethylporphyrin and tetraphenylporphyrin.

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Gallium and zirconium octaethylporphyrin (OEP) and tetraphenylporphyrin (TPP) were examined by electrospray ionization (ESI) mass spectrometry. All systems were prepared in dichloromethane with addition of a stabilizing lipophilic anionic agent, sodium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate

Remarkably stable chiral zirconium complexes for asymmetric Mannich-type reactions.

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Isolable, air-stable, storable, and highly selective chiral zirconium catalysts for asymmetric Mannich-type reactions have been developed. The reactions of imines with silicon enolates proceeded smoothly using 1-10 mol % of the powdered zirconium catalyst to afford the corresponding adducts in high

Aqua Complexes of [(2-Methoxyethyl)cyclopentadienyl]zirconium Trichloride.

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The behavior of [(eta(5):eta(1)-C(5)H(4)CH(2)CH(2)OMe)ZrCl(2)(&mgr;-Cl)](2) (1) toward a variety of solvents, and especially water, was investigated. The bidentate coordination of the C(5)H(4)CH(2)CH(2)OMe ligand is retained in chloroform, dichloromethane, benzene, acetone, thf, and acetonitrile. No

Mechanical and biological evaluations of novel electrospun PLLA composite scaffolds doped with oxide ceramics.

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The objective of this study is to evaluate the in vitro performance of the novel electrospun composite scaffolds that are made of 10% PLLA in binary solvents (75 vol% dichloromethane: 25 vol% acetone) doped with 0.1 wt% of oxide ceramic powders (Hafnium dioxide (HfO₂), titanium dioxide

Synthesis, Structure, and Properties of Group 4 and 5 Metal Pyrazolato Chloride Complexes.

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Treatment of titanium tetrachloride with 3,5-di-tert-butylpyrazole (2 equiv) and triethylamine (2 equiv) in toluene afforded dichlorobis(3,5-di-tert-butylpyrazolato)titanium(IV) (93%). A similar reaction with 3 equiv of 3,5-di-tert-butylpyrazole and triethylamine gave

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