- Palladium(II) complexes comprising naphthylamine and biphenylamine based Schiff base ligands: Synthesis, structure and catalytic activity in Suzuki coupling reactions
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New palladium(II) Schiff base complexes of the general formula [Pd(L1?6)2] [L1 = N-(Naphthyl)-salicylaldimine (1), L2 = N-(Naphthyl)-methoxysalicylaldimine (2), L3 = N-(Biphenyl)-salicylaldimine (3), L4 = N-(Biphenyl)-methoxysalicylaldimine (4), L5 = N-(Naphthyl)-2-hydroxy-1-naphthaldimine (5), L6 = N-(Biphenyl)-2-hydroxy-1-naphthaldimine (6)] 1–6 have been synthesized by the reaction of [Pd(OAc)2] with bidentate Schiff base ligands. The palladium(II) complexes were fully characterized by analytical, spectral (FT?IR, UV–Vis, 1H NMR & 13C NMR) methods. The molecular structure of the one of the complexes [Pd(L1)2] (6) was confirmed by single crystal X?ray diffraction methods. Further, the new palladium(II) complexes were tested as catalyst for Suzuki-Miyaura coupling reactions and exhibits very good catalytic activity.
- Balasubramani, Kasturi,Kaleeswaran, Dhananjayan,Nagalakshmi, Veerasamy,Premkumar, Muniyappan,Sathya, Munusamy,Venkatachalam, Galmari
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- Monomeric and dimeric Al(III) complexes for the production of polylactide
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A series of monometallic and bimetallic Al(iii) complexes with substituted naphthyl based Schiff base ligands have been prepared and characterised. When 1-aminonaphthalene based ligands were reacted with AlMe3 monometallic complexes were isolat
- Kirk, Sarah M.,Quilter, Helena C.,Buchard, Antoine,Thomas, Lynne H.,Kociok-Kohn, Gabriele,Jones, Matthew D.
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p. 13846 - 13852
(2016/09/09)
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- Comment on 'Fluorescence sensing of arsenate at nanomolar level in a greener way: Naphthalene based probe for living cell imaging'
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The naphthalene based probe (NAPSAL) described in the entitled communication is not stable in water, and therefore NAPSAL is unsuitable as an aqueous arsenate sensor.
- Liu, Yuanli,Trogler, William C.
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supporting information
p. 14775 - 14777
(2015/10/05)
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- Palladium(0)-mediated C-H bond activation of N-(naphthyl)salicylaldimine and related ligands: utilization of the resulting organopalladium complexes in catalytic C-C and C-N coupling reactions
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N-(Naphthyl)-4-R-salicylaldimines (R = OCH3, H and Cl; H2L1-H2L3) and 2-hydroxy-N-(naphthyl)naphthaldimine (H2L4) readily undergo, upon reaction with Na2[PdCl4] in the presence of triphenylphosphine, cyclopalladation via C-H bond activation at the peri-position to afford complexes of type [Pd(L)(PPh3)] (L = L1-L4). The C-H bond activation has been found to be mediated by palladium(0) formed in situ. A similar reaction of H2L1 with Na2[PdCl4] in the presence of 1,2-bis(diphenylphosphino)ethane (dppe), in a 2 : 2 : 1 mole ratio, yields a dinuclear complex of type [{Pd(L1)}2(dppe)]. Reaction of H2L1 with Na2[PdCl4] in the presence of 4-picoline (pic) yields [Pd(L1)(pic)]. The molecular structures of the six complexes have been determined by X-ray crystallography. The aldiminate ligand in each compound is coordinated to the metal center as a di-anionic tridentate ONC-donor, with the fourth coordination site occupied by a phosphine or picoline ligand. The new complexes show intense absorptions in the visible and ultraviolet regions, and the nature of the optical transitions has been analyzed by TDDFT calculations. The palladium complexes display notable efficiency in catalyzing C-C and C-N bond coupling reactions. The thermodynamics for the formation of the cyclometalated catalyst precursor [Pd(L2)(PPh3)] has been evaluated by DFT calculations.
- Dutta, Jayita,Richmond, Michael G.,Bhattacharya, Samaresh
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p. 13615 - 13632
(2015/08/03)
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- A quick route for the synthesis of 3-Aryl-3,4-dihydro-2H-benz[e]-1,3- oxazin-2-ones
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N-(2-Hydroxy)-benzyl-arylamines (1) gave substantially pure 3-aryl-3,4-dihydro-2H-benz[e]-1,3-oxazin-2-one 2 on cyclization with carbonyldiimidazole in DMSO in 20-30 min at 20-25 °C in excellent yields.
- Shukla, Davender Kumar,Rani, Manju,Khan, Arif Ali
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p. 4537 - 4540
(2013/06/27)
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- Rational design of metallophosphors with tunable aggregation-induced phosphorescent emission and their promising applications in time-resolved luminescence assay and targeted luminescence imaging of cancer cells
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A series of Pt(ii) complexes with different NO ligands have been synthesized and characterized by NMR, mass spectroscopy, and X-ray diffraction studies. All complexes are non-emissive in dilute solution. Interestingly, they exhibit aggregation-induced pho
- Liu, Shujuan,Sun, Huibin,Ma, Yun,Ye, Shanghui,Liu, Xiangmei,Zhou, Xinhui,Mou, Xin,Wang, Lianhui,Zhao, Qiang,Huang, Wei
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supporting information
p. 22167 - 22173
(2012/11/14)
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- Synthesis of cobalt(III), iron(III), and chromium(III) Complexes with salicylaldiminato ligands: Evaluation of the complexes as catalysts for oxidation of L-cysteine
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A series of new cobalt(III)-, iron(III)-, and chromium(III)-based complexes of the general formula [M(N∩O)2Cl] (N∩O: N-salicylidene(X)amine and sodium N-(4-sulfonatosalicylidene(X)amine)) (X = cyclohexyl and 1-naphthyl) was prepared and characterized. Some of the isolated complexes have been evaluated as catalysts for the oxidation of L-cysteine. Preliminary results show that the rate of oxidation of L-cysteine is influenced by the nature of the metal center, the geometry of the complex, the auxiliary substituents, and the backbone of the ligand.
- Abu-Surrah, Adnan S.,Abdel-Halim, Hamzeh M.,Al-Qaisi, FedA'A M.
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experimental part
p. 848 - 852
(2009/03/11)
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- A thermal study of some Schiff bases derivative of α-napthylamine
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Thermal analyses of some Schiff bases, derivative of α-napthylamine, were performed by the DSC, TG and DTA techniques. The thermograms were used to determine various kinetic parameters, such as the order of degradation (n), energy of activation (E), frequ
- Baluja, Shipra,Pandya, Nirmal,Vekariya, Nayan
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experimental part
p. 1601 - 1604
(2009/02/03)
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- Bis(salicylaldiminato)titanium complexes containing bulky imine substituents: Synthesis, characterization and ethene polymerization studies
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A series of titanium complexes bearing two anionic [N, O-] bidentate salicylaldiminato ligands, namely bis[(N-salicylidene)anilinato]titanium(IV) dichloride (1), bis[(N-salicylidene)-2,6-dimethylamlinato]titanium(IV) dichloride (2), bis[(N-salicylidene)-2,6-di-i- propylanilinato]titanium(IV) dichloride (3), bis [(N-salicylidene) - (1-naphthalenylimino)]titanium(IV) dichloride (4), bis[(N-salicylidene)-2,6-difruoroanilinato]titanium(IV) dichloride (5), and bis[(N-3-fluorosalicylidene)-2,6-difluoroanilinato]titanium(IV) dichloride (6) have been synthesized with good yields by a two-step procedure. The X-ray structure analysis reveals that in complex 2, titanium has a distorted octahedral coordination sphere in which the oxygen atoms and the chloride ligands form the basal plane. Both the chloride and the phenoxy moieties have a cis orientation and the angle between the chloride ligands is 93.05°. The imine nitrogen atoms complete the octahedral coordination of the Ti center by occupying the axial positions. The newly synthesized (2 and 4-6) and already known complexes (1 and 3) were introduced in detailed ethene-polymerization studies. The activities achieved were low to moderate depending on the size and nature of the imino substituents. The polyethenes (PEs) produced had high molar masses, and the modalities of the molecular weight distributions varyied with polymerization temperature. Based on the results of ab initio calculations and on the experimental data obtained, an explanation for uni- and bimodal polymerization behavior and the differences in catalytic activities are given. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005.
- Paerssinen, Antti,Luhtanen, Tommi,Klinga, Martti,Pakkanen, Tapani,Leskelae, Markku,Repo, Timo
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p. 2100 - 2109
(2007/10/03)
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- Indium(III) Complexes with Some Salicylidene Aromatic Schiff Bases
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In(III) complexes with salicylidene aromatic Schiff bases have been prepared.The nature of the complexes has been studied by microanalysis of the solid complexes, conductometric titration, uv and ir spectrophotometric measurements.The complexes are of the type 1:1 and 2:1 depending upon the Schiff base.The tendency of the salicylidene Schiff base molecule towards complex formation with In(III) is found to depend largely on the strength of the intramolecular hydrogen bond established between the aldehydic OH group and C=N.Furthermore, it is concludedthat these Schiff bases cordinate to In(III) as tri- or bidentate ligands depending upon the molecular structure of the Schiff base (not as monodentate ligand as previously described).The high molar absorbance of the 1:2 In(III) complex with salicylidene-o-hydroxyaniline I (17800 mol-1cm2) can be applied for the microdetermination of small amounts of Indium as low as 0.57 μg/ml solution. - Keywords: Indium(III) complexes; Schiff bases
- Mahmoud, M.R.,Issa, I.M.,El-Gyar, S.A.
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p. 431 - 438
(2007/10/02)
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