نتایج جستجو برای: salicylaldimine

تعداد نتایج: 80  

Journal: :Dalton transactions 2015
Tameryn Stringer Dale Taylor Hajira Guzgay Ajit Shokar Aaron Au Peter J Smith Denver T Hendricks Kirkwood M Land Timothy J Egan Gregory S Smith

A series of mono- and bis-salicylaldimine ligands and their corresponding Rh(i) complexes were prepared. The compounds were characterised using standard spectroscopic techniques including NMR, IR spectroscopy and mass spectrometry. The salicylaldimine ligands and complexes were screened for antiparasitic activity against two strains of Plasmodium falciparum i.e. the NF54 CQ-sensitive and K1 CQ-...

Journal: :Dalton transactions 2015
Faiz-Ur Rahman Amjad Ali Rong Guo Yun-Chang Zhang Hui Wang Zhan-Ting Li Dan-Wei Zhang

A series of novel Pt(ii) complexes [cis- and trans-Pt(ii)(salicylaldimine)(DMSO)Cl (), trans-Pt(ii)(salicylaldimine)(4-picoline)Cl (), Pt(ii)(salicylaldimine)Cl (), trans- and cis/trans-Pt2(ii)(salicylaldimine)(DMSO)2Cl2 (), trans-Pt2(ii)(salicylaldimine)(4-picoline)2Cl2 () was synthesized and characterized. The structures of -cis, -trans and were determined using a single crystal X-ray analysi...

Journal: :Advanced synthesis & catalysis 2007
Joseph B Binder Ilia A Guzei Ronald T Raines

Tuning the electronic and steric environment of olefin metathesis catalysts with specialized ligands can adapt them to broader applications, including metathesis in aqueous solvents. Bidentate salicylaldimine ligands are known to stabilize ruthenium alkylidene complexes, as well as allow ring-closing metathesis in protic media. Here, we report the synthesis and characterization of exceptionally...

Journal: :Soft matter 2014
Chiung-Cheng Huang Ching-Chung Hsu Li-Wen Chen Yu-Lun Cheng

Two series of chiral salicylaldimine-based liquid crystals which differ from each other in the position of the (S)-2-octyloxy tail have been synthesized and characterized by polarizing optical microscopy, differential scanning calorimetry, and electrical switching. Compounds OH I (n = 6-7) having (S)-2-octyloxy tail close to the salicylaldimine core and compounds OH II (n = 6-11) having (S)-2-o...

Journal: :Acta chimica Slovenica 2010
Rasoul Vafazadeh Somayeh Bidaki

Visible spectrophotometry is used to study the kinetic of ligand exchange in the system Cu(salpn)/H2salen with or without triethylamine (NEt3) and H2O in acetonitrile solvent at 25 ± 0.1°C and 0.01 M NaNO3 (H2salen and H2salpn are N,N'-ethylen-bis(salicylaldimine) and N,N'-propylen-bis(salicylaldimine), respectively). It is found that the reaction rate is first-order with respect to Cu(salpn). ...

2012
Michael Dreher Helmut Paulus

X-ray structures of five bis(N — R-salicylaldiminato)zinc(II) complexes with R — ethyl, «-propyl, /-propyl, «-butyl and 4-thia-rc-hexyl were determined. The N202 coordination geometry is in all cases gwas/-tetrahedral with the dihedral angle between the planes of the two chelate rings ranging from 84 to 89°. Bond lengths and angles in the coordination sphere are not affected by the nature of R ...

Journal: :Angewandte Chemie 2001
F M Bauers S Mecking

Semicrystalline microparticles of high molecular mass polyethylene can be prepared as aqueous dispersions by catalytic emulsion polymerization of ethylene with a mini-emulsified catalyst precursor (D$\rm{\frown}$D=salicylaldimine, L=pyridine). Stable polymer latexes are formed.

2015
Rasoul Vafazadeh Maryam Bagheri

Visible spectrophotometry is used to study the kinetics of ligand exchange in the system Ni(salpn)/H2salen with or without triethylamine (NEt3) and H2O in dimethylformamide (DMF) solvent at 25 ± 0.1 °C and 0.01 M NaNO3 [H2salen and H2salpn are N,N’-ethylen-bis(salicylaldimine) and N,N’-propylen-bis(salicylaldimine), respectively]. It was found that the reaction rate is of the first-order with r...

Journal: :Chemical communications 2003
Eric F Connor Todd R Younkin Jason I Henderson Andrew W Waltman Robert H Grubbs

A facile synthesis of nickel salicylaldimine complexes with labile dissociating ligands is described. In addition to producing highly active ethylene polymerization catalysts, important insights into the effect of ligand size on catalyst stability and information on the mechanism of polymerization are provided.

Journal: :Dalton transactions 2017
Jin Yang

Reactions of imidazoliums with palladacycles afforded NHC-palladacycle complexes. The reactivity of the NHC-palladacycles was explored and the results demonstrated that they could be template-directed ortho-aromatic metaloxylated in the presence of tert-butyl hydroperoxide (TBHP), affording (NHC)Pd(salicylaldimine)Cl complexes. Furthermore, the NHC-palladacycles showed efficient catalytic activ...

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