- Synthesis and characterization of new galactosylated-based N2O-donors tridentate ligands
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The synthesis and characterization of three novel N2O-donor ligands containing the group 4-[1-β-d-2,3,4,6-tetra-O-acetyl-galactosyl)]benzaldehyde are presented. The insertion of this group was designed to increase the absorption of the prodrug in tumor cells, and is part of an ongoing work in our group with tridentate ligands to develop potential cobalt(III) prodrugs. The synthetic route described here allowed the isolation of pure ligands with yields ranged 81–89%. Finally, compounds were characterized by IR, NMR and HRMS (ESI+).
- Castro, Lidiane C.,Jaconiano, Yasmim R.,Evangelista, Tereza C. S.,Ferreira, Sabrina B.,Scarpellini, Marciela
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- Phenoxo bridged luminescent dinuclear zinc(II) and cadmium(II) complexes of 2-[[[2-(2-pyridyl)ethyl]imino]methyl]phenol: Crystal structure, photophysical and thermal studies
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Reactions of zinc(II) and cadmium(II) halides with an N,N,O-donor Schiff-base ligand HL (obtained by the 1:1 condensation of salicylaldehyde and 2-(2-aminoethyl)pyridine) yield six new phenoxo bridged dinuclear complexes of the general formula [Zn2/
- Chakraborty, Prateeti,Guha, Averi,Das, Sudanshu,Zangrando, Ennio,Das, Debasis
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- Cytotoxic oxidovanadium(IV) complexes of tridentate halogen‐substituted Schiff bases: First dinuclear V(IV) complexes with O → VIV = O → VIV = O core
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The reaction of potentially N,N,O-tridentate Schiff base ligands, Cl-LH, Br-LH, BrCl-LH and H-LH, with [VIVO(acac)2] in 2:1 ratio in methanol gave the corresponding mononuclear and dinuclear oxidovanadium(IV) complexes, VO(Cl-L)
- Aryaeifar, Mahnaz,Blacque, Olivier,Correia, Isabel,Marques, Fernanda,Micale, Nicola,Rudbari, Hadi Amiri,Saadati, Arezoo
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supporting information
(2021/08/16)
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- Mn(III) and Mn(II) complexes of tridentate Schiff base ligands; synthesis, characterization, structure, electrochemistry and catalytic activity
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Three Mn(III) complexes [Mn(L1)2] (ClO4) 1, [Mn(L2)2] (ClO4) 2, [Mn(L3)2] (ClO4) 3, and one Mn(II) complex [Mn(L4)2] 4 were studied fo
- Egekenze, Rita N.,Gultneh, Yilma,Butcher, Ray
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p. 232 - 242
(2018/04/23)
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- Monomeric complexes of Re(CO)3+ ion with tridentate N∩N∩O-ligands - Schiff base derivatives of salicylic aldehyde
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Simple synthetic procedures, reactions of Re(CO)5Cl with potentially tridentate N∩N∩OH ligands (Schiff bases prepared from aliphatic or aromatic amines and salicylic aldehyde) lead to formation of monomeric complexes of fac-Re(CO)3s
- Grzegorczyk, Marek,Kapturkiewicz, Andrzej,Sanjuan-Szklarz, Fabiola W.,Nowacki, Jacek
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p. 103 - 106
(2014/06/23)
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- Encapsulation of the BeII cation: Spectroscopic and computational study
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The structures of a series of tetracoordinate beryllium(II) complexes with ligands derived from tertiary-substituted amines have been computationally modeled and their 9Be magnetic shielding values determined using the gauge-including atomic orbital (GIAO) method at the 6-311++g(2d,p) level. A good correlation was observed between calculated 9Be NMR chemical shifts when compared to experimental values in polar protic solvents, less so for the values recorded in polar aprotic solvents. A number of alternative complex structures were modeled, resulting in an improvement in experimental versus computational 9Be NMR chemical shifts, suggesting that in some cases full encapsulation on the beryllium atom was not occurring. Several of the synthesized complexes gave rise to unexpected fluorescence, and inspection of the calculated molecular orbital diagrams associated with the electronic transitions suggested that the rigidity imparted by the locking of certain conformations upon BeII coordination allowed delocalization across adjacent aligned aromatic rings bridged by BeII.
- Shaffer, Karl J.,Davidson, Ross J.,Burrell, Anthony K.,McCleskey, T. Mark,Plieger, Paul G.
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p. 3969 - 3975
(2013/05/09)
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- COMPOUNDS FOR PHOTODYNAMIC THERAPY
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A metal-ligand complex comprising a transition metal complexed with at least one Schiff base ligand comprising an additional nitrogen atom from a heterocycle and at least one heteroaromatic nucleic acid intercalating moiety. A pharmaceutical composition c
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Page/Page column 22
(2012/02/05)
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- DNA binding and nuclease activity of copper(II) complexes of tridentate ligands
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Two copper(II) complexes, 1 and 2 with L1 and L2 [L1 = 2-hydroxybenzyl(2-(pyridin-2-yl)ethylamine); L2 = 2-hydroxybenzyl(2-(pyridin-2-yl)methylamine)] ligands, respectively, have been synthesized and characteriz
- Kumar, Pankaj,Baidya, Basudeb,Chaturvedi, Sumit Kumar,Khan, Rizwan Hasan,Manna, Debasis,Mondal, Biplab
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experimental part
p. 264 - 270
(2011/11/12)
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- Synthesis, characterization, and formation constant of hexacoordinate iron(III) complexes
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Twelve iron(III) complexes [FeIII(LX)2]ClO4, where (LX)- is the deprotonated form of a series of asymmetric ligands containing pyridine and substituted phenol moieties (XPh(OH)-CH=N-(CH2)n-Py that X = H, 5-Br, 5-NO2, 5-OMe, 4-OMe, 3-OMe, and n = 1, 2), were synthesized and characterized by H NMR, IR, UV-Vis spectroscopy, mass spectrometry, and elemental analysis. Formation constants were measured using UV-Vis spectrophotometric titration at constant ionic strength (0.10 M NaClO4) at 25 (±0.1)°C. The trend of the complex formation of Fe(III) ion with a given tridentate ligand decreases as follows: 5-OMe > 5-H > 5-NO2 > 5-Br 5-OMe > 4-OMe > 5-OMe.
- Asadi, Mozaffar,Hemmateenejad, Bahram,Mohammadikish, Maryam
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experimental part
p. 124 - 135
(2010/09/10)
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- Synthesis and Crystal Structures of a Series of Amide Copper(II) Complexes
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The synthesis and structural determination by X-ray crystallography of four amide copper(II) complexes has been performed: NH(CH2)nPh>(solv)>2 (X = H, solv = H2O, n = 2 1 or 1 2; X = OH, solv = H2O, n = 2 3; solv = MeCN, n = 1 4).In all complexes the co-ordination around the copper atom is a more or less distorted square-based pyramid where the three ligands of the square are unchanged: one oxygen atom of the amide group and two nitrogen atoms of the pyridine nucleus and of the tertiary amine.The fourth ligand is a water molecule (1-3) or an acetonitrile solvent molecule (4).The axial ligand is the oxygen atom of the phenolic group in complexes 3 and 4, while in 1 and 2 this site is occupied by an oxygen atom of a triflate counter ion.
- Alilou, El Houssine,Amadei, Edith,Giorgi, Michel,Pierrot, Marcel,Reglier, Marius
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p. 549 - 558
(2007/10/02)
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- COMPLEXATION D'IMINOPYRIDINES PAR LE SEL DE ZEISE: VOIE D'ACCES A DES CONJUGUES ESTRADIOL-cis-DICHLORO PLATINE. ETUDE STRUCTURALE DU COMPLEXE cis-PtCl2,H20
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In order to synthesize penta- and hexa-gonal platinum(II) metallocycles, bidentate ligands such as iminopyridines (L) have been prepared and characterized.The (2-pyridil)CH=NR1 and (2-pyridil)CH2N=CR1R2 ligands react with Zeise's salt to afford directly the pentagonal chelates PtCl2L.Their structure and the cis-stereochemistry were shown by the usual spectroscopic methods and for cis-PtCl2,H2O by an X-ray diffraction study.On the other hand, the (2-pyridil)(CH2)2N=CR1R2 ligands do not afford the expected hexagonal metallocycles; instead, after complexation at the nitrogen atom of the imine they give rise to the (2-pyridil)ethylamine complex formed after hydrolysis of the coordinated ligands.Complexes trans-1R2>-PtCl2 represent when R1 is estradiol a model for "cytotoxic with delayed activity".
- Pointeau, Philippe,Patin, Henri,Mousser, Abdelhamid,Marouille, Jean-Yves Le
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p. 263 - 276
(2007/10/02)
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- SYNTHESIS, ACID-BASIC PROPERTIES AND CHELATING TENDENCY OF AMINOPHOSPHONIC AND AMINOPHOSPHINIC ACIDS WITH CHANGING ANALYTICAL-FUNCTIONAL GROUPS
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The preparation of new N-substituted aminophosphinic and aminophosphonic acids have been described.Dissociation constants and stability constants of complexes towards metal cations have been determined.The obtained colored complexes have been characterized and their analytical application emphasized.
- Siepak, Jerzy
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p. 955 - 970
(2007/10/02)
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