A5072832793- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Crystallography and molecular interactions
- Vanadium and Halogenation Chemistry
- Metal complexes synthesis and properties
- Metal-Catalyzed Oxygenation Mechanisms
- Polyoxometalates: Synthesis and Applications
- Oxidative Organic Chemistry Reactions
- Lanthanide and Transition Metal Complexes
- Molecular Sensors and Ion Detection
- Magnetism in coordination complexes
- Ferrocene Chemistry and Applications
- Synthesis and biological activity
- Chemical Synthesis and Reactions
- Metal-Organic Frameworks: Synthesis and Applications
- Synthesis and Characterization of Heterocyclic Compounds
- Radioactive element chemistry and processing
- Supramolecular Chemistry and Complexes
- Pneumocystis jirovecii pneumonia detection and treatment
- Porphyrin and Phthalocyanine Chemistry
- Organometallic Complex Synthesis and Catalysis
- Multicomponent Synthesis of Heterocycles
- Amoebic Infections and Treatments
- Synthesis and Biological Evaluation
- Inorganic and Organometallic Chemistry
Universidade da Coruña
2016-2025
Universidad Nacional de La Pampa
2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2015-2024
Centro de Investigación Docencia y Consultoria Administrativa
2018-2020
Jamia Millia Islamia
2013-2016
Indian Institute of Technology Roorkee
2009-2015
University of Manchester
2005
Universitat de València
2005
École Polytechnique Fédérale de Lausanne
2002-2003
University of Coimbra
1999-2003
We report the synthesis and characterization of several chiral salen- salan-type ligands their vanadium complexes, which are derived from salicylaldehyde or derivatives diamines (1R,2R-diaminocyclohexane, 1S,2S-diaminocyclohexane, 1S,2S-diphenylethylenediamine). The structures H2sal(R,R-chan)2+·2Cl−·(CH3)2CHOH·H2O (1c; H2sal(R,R-chan) = N,N′-salicyl-R,R-cyclohexanediaminium), Etvan(S,S-chen) (3c; N,N′-3-ethoxy-salicylidene-S,S-cyclohexanediiminato), naph(R,R-chen) (6c;...
The Schiff base N,N'-ethylenebis(pyridoxylideneiminato) (H(2)pyr(2)en, 1) was synthesized by reaction of pyridoxal with ethylenediamine; reduction H(2)pyr(2)en NaBH(4) yielded the reduced N,N'-ethylenebis(pyridoxylaminato) (H(2)Rpyr(2)en, 2); their crystal structures were determined X-ray diffraction. totally protonated forms 1 and 2 correspond to H(6)L(4+), all protonation constants pH-potentiometric (1)H NMR titrations. Several vanadium(IV) vanadium(V) complexes these other related ligands...
The Schiff base (Hfsal-dmen) derived from 3-formylsalicylic acid and N,N-dimethyl ethylenediamine has been covalently bonded to chloromethylated polystyrene give the polymer-bound ligand, PS-Hfsal-dmen (I). Treatment of with [V(IV)O(acac)(2)] in presence MeOH gave oxidovanadium(IV) complex PS-[V(IV)O(fsal-dmen)(MeO)] (1). On aerial oxidation methanol, 1 was oxidized PS-[V(V)O(2)(fsal-dmen)] (2). corresponding neat complexes, [V(IV)O(sal-dmen)(acac)] (3) [V(V)O(2)(sal-dmen)] (4) were...
Binucleating hydrazones CH2(H2sal-bhz)2 (I) and CH2(H2sal-fah)2 (II), derived from 5,5′-methylbis(salicylaldehyde) benzoylhydrazide or 2-furoylhydrazide, react with [VIVO(acac)2] to give dinuclear VIVO-complexes [CH2{VIVO(sal-bhz)(H2O)}2] 1 [CH2{VIVO(sal-fah)(H2O)}2] 4, respectively. In the presence of KOH CsOH·H2O, oxidation 2 results in formation dioxidovanadium(V) complexes, K2[CH2{VVO2(sal-bhz)}2]·2H2O 2, K2[CH2{VVO2(sal-fah)}2]·2H2O 5, Cs2[CH2{VVO2(sal-bhz)}2]·2H2O 3...
The Schiff bases H3dfmp(L)2 obtained by the condensation of 2,6-diformyl-4-methylphenol and hydrazones [L = isonicotinoylhydrazide (inh), nicotinoylhydrazide (nah) benzoylhydrazide (bhz)] are prepared characterized. By reaction [VIVO(acac)2] in methanol VIVO-complexes [VIVO{Hdfmp(inh)2}(H2O)] (1), [VIVO{Hdfmp(nah)2}(H2O)] (2) [VIVO{Hdfmp(bhz)2}(H2O)] (3) were obtained. Upon their aerial oxidation [VVO(OMe)(MeOH){Hdfmp(inh)2}] (4), [VVO(OMe)(MeOH){Hdfmp(nah)2}] (5)...
Reaction of tris(2-hydroxybenzylidene)-triaminoguanidinium chloride (I·HCl) and tris(5-bromo-2-hydroxybenzylidene)-triaminoguanidinium (II·HCl) with [VIVO(acac)2] (1:1 molar ratio) in refluxing methanol resulted mononuclear [VIVO] complexes, [VIVO(H2L1′)(MeOH)] (1) [VIVO(H2L2′)(MeOH)] (2), respectively, where I II undergo intramolecular triazole ring formation. Aerial oxidation 1 2 MeOH the presence Cs2CO3 gave corresponding cis-[VVO2] complexes Cs[(VO2)(H2L1′)] (3) Cs[(VO2)(H2L2′)] (4)....
Abstract Several sal 2 en‐type reduced Schiff bases have been prepared from the reaction of equiv. salicylaldehyde (or derivatives) with ethylenediamine followed by reduction NaBH 4 and subsequently characterised. The water‐soluble ligands (SO 3 ‐sal) en R(SO ‐sal = salicylaldehyde‐5‐sulphonate) studied pH potentiometry 1 H NMR spectroscopy protonation constants determined. are more susceptible to hydrolysis than corresponding bases. crystal structures ( o ‐van) KH( ‐van ‐vanillin)...
Lanthanide complexes with the Schiff base axial macrobicyclic ligand L1 react Zn(II) nitrate in presence of CaH2 to yield Ln(III)−Zn(II) heterodinuclear cryptates formula [Ln(NO3)(L1-3H)Zn](NO3)·xH2O·yMeOH. The receptor is an azacryptand N[(CH2)2NCH−R−CHN−(CH2)2]3N (R = 1,3-(2-OH-5-Me-C6H2)). crystal structures Pr(III), Yb(III), and Lu(III) complexes, chemical formulas [Ln(NO3)(L1-3H)Zn](NO3)·xSolv (monoclinic, C2/c, Z 8), as well that [Zn2(L1-3H)](NO3)·H2O (15) (triclinic, P1̄, 2), have...
The reaction between [VIVO(acac)2] and the ONN donor Schiff base obtained by condensation of pyridoxal 2-aminoethylbenzimidazole (Hpydx-aebmz, I) or 2-aminomethylbenzimidazole (Hpydx-ambmz, II) in equimolar amounts results formation [VIVO(acac)(pydx-aebmz)] 1 [VIVO(acac)(pydx-ambmz)] 2, respectively. aerobic oxidation methanolic solution yielded [VVO2(pydx-aebmz)] 3 its with aqueous H2O2 gave oxidoperoxidovanadium(V) complex, [VVO(O2)(pydx-aebmz)] 4. 4 is also established titrations...
Different vanadium(<sc>v</sc>) complexes with 6,6′-(2-(pyridin-2-yl)ethylazanediyl)bis(methylene)bis(2,4-di-<italic>tert</italic>-butylphenol) (H<sub>2</sub>L<sup>1</sup>) were isolated and characterized one of them, [V<sup>V</sup>O(OMe)(MeOH)(L<sup>1</sup>)] was used as a functional mimic catechol oxidase catalyst precursor for the oxidative bromination thymol.
Salen complexes are a versatile and standard system in oxidation catalysis. Their reduced derivatives, called salan, share their versatility but still widely unexplored. We report the synthesis of group new vanadium-salen -salan complexes, characterization application simple organic molecules with H 2 O . The ligands derived from pyridoxal chiral diamines (1,2-diaminocyclohexane 1,2-diphenylethylenediamine) were easily obtained high yields. V IV prepared characterized solid state (Fourier...
We report the synthesis and characterization of several amino alcohol-derived reduced Schiff base ligands (AORSB) corresponding V(IV)O V(V) complexes. Some related variants (amino alcohol derived = AOSB) were also prepared characterized. With some exceptions, all compounds are formulated as dinuclear {V(IV)O(L)}(2) in solid state. Suitable crystals for X-ray diffraction obtained two AORSB compounds, well a rare structure chiral compound, which revealed {V(IV)O(AOSB)}(2) with rather short V-V...
Reactions between the tridentate ONN donor ligands, Hbzpy-tch () and Hbzpy-inh (), with [V(IV)O(acac)2] in dry methanol give two different types of complexes, [V(IV)O(acac)(bzpy-tch)] [V(IV)O(OMe)(bzpy-inh)] respectively. Irrespective their nature upon aerial oxidation precipitation both yield dinuclear [{V(V)O(bzpy-tch)}2(μ-O)2] [{V(V)O(bzpy-inh)}2(μ-O)2] (). Treatment or H2O2 yields oxidomonoperoxidovanadium(v) complexes [{V(V)O(bzpy-tch)}2(μ-O2)2] [V(V)O(O2)(bzpy-inh)]...
Prospective anticancer metallodrugs should consider target-specific components in their design order to overcome the limitations of current chemotherapeutics. The inclusion vitamins, which receptors are overexpressed many cancer cell lines, has proven be a valid strategy. Therefore, this paper we report synthesis and characterization set new compounds [Ru(η5-C5H5)(P(C6H4R)3)(4,4′-R′-2,2′-bpy)]+ (R = F R′ H, 3; R biotin, 4; OCH3 5; 6), inspired by exceptional good results recently obtained...