A5100629880- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Organometallic Complex Synthesis and Catalysis
- Metal complexes synthesis and properties
- Crystallography and molecular interactions
- Carbon dioxide utilization in catalysis
- Asymmetric Hydrogenation and Catalysis
- Coordination Chemistry and Organometallics
- biodegradable polymer synthesis and properties
- Synthesis and characterization of novel inorganic/organometallic compounds
- Synthetic Organic Chemistry Methods
- Magnetism in coordination complexes
- Ferrocene Chemistry and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Chemical Synthesis and Reactions
- Synthesis and Characterization of Heterocyclic Compounds
- Microgrid Control and Optimization
- Organoboron and organosilicon chemistry
- Chemical Synthesis and Analysis
- DNA and Nucleic Acid Chemistry
- Supramolecular Chemistry and Complexes
- Protein Structure and Dynamics
- Asymmetric Synthesis and Catalysis
- Lanthanide and Transition Metal Complexes
- Inorganic Chemistry and Materials
University of Castilla-La Mancha
2015-2024
Ecopetrol (Colombia)
2024
National University of Tucumán
2016-2022
University of Reading
2021
ORFEO-CINQA Research Network
2014-2020
Hospital General Universitario de Ciudad Real
2000-2020
Instituto de Química Orgánica General
1998-2020
Rede de Química e Tecnologia
2020
Tecnologie Avanzate (Italy)
2017-2019
Consejo Nacional de Investigaciones Científicas y Técnicas
2013-2018
This paper presents a current control scheme for voltage-source converter connected to the grid through an <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$LCL$</tex></formula> filter. The proposed is based on linear quadratic (LQ) Gaussian (LQG) servo controller technique, which combines LQ regulator and Kalman filter (KF). use of KF instead Luenberger estimator improves quality estimation state...
Bifunctional aluminum complexes supported by novel zwitterionic NNO-donor scorpionate ligands were found to be efficient bifunctional catalysts for cyclic carbonate synthesis from terminal and internal epoxides in good yields with broad substrate scope. Neutral (1–2) designed used as precursors obtain two NNO-heteroscorpionate (3–4). Reaction of 3 or 4 [AlX3] (X = Me, Et) a 1:1 1:2 molar ratio afforded the mononuclear dinuclear cationic [AlX2{κ2-mbpzbdmape}]I2 Me (5), Et (6)),...
One approach to reduce the side effects of chemotherapy in cancer treatment is photodynamic therapy (PDT), which allows spatiotemporal control cytotoxicity. We have used strategy coordinating π-expansive ligands increase excited state lifetimes Ir(III) half-sandwich complexes order facilitate generation 1O2. obtained derivatives formulas [Cp*Ir(C∧N)Cl] and [Cp*Ir(C∧N)L]BF4 with different degrees π-expansion C∧N ligands. Complexes more ligand are very effective photosensitizers phototoxic...
Ruthenium derivatives of the type [RuCl(arene)(NN)][BPh4] (arene = benzene, p-cymene) have been synthesized with NN 2-hydroxyphenylbis(pyrazol-1-yl)methane (bpzmArOH) or 2-hydroxyphenylbis(3,5-dimethylpyrazol-1-yl)methane (bpz*mArOH). In p-cymene derivative containing bpzmArOH, activation hydroxy group is observed and a scorpionate complex obtained ligand behaving in tridentate manner, [Ru(bpzmArO-κ3-N,N,O)(p-cymene)][BPh4]. The structure this that [RuCl(p-cymene)(bpz*mArOH)][BPh4] were...
The reaction of the sterically hindered heteroscorpionate lithium acetamidinate [Li(κ3-pbptamd)(THF)] (pbptamd = N,N′-diisopropylbis(3,5-di-tert-butylpyrazol-1-yl)acetamidinate) and [Li(κ3-tbptamd)(THF)] (tbptamd N–ethyl-N′-tert-butylbis(3,5-di-tert-butylpyrazol-1-yl)acetamidinate) with 1 equiv RMgCl proceeds cleanly to give very high yields corresponding nonchiral monoalkyl magnesium complexes [Mg(R)(κ3-NNN)] (NNN pbptamd, R Me (1), Et (2), CH2SiMe3 (3), CH2Ph (4), C3H5 (5); NNN tbptamd,...
The ligands 2-pyridin-2-yl-1H-benzimidazole (HL1), 1-methyl-2-pyridin-2-ylbenzimidazole (HL2), and 2-(1H-imidazol-2-yl)pyridine (HL3) the proligand 2-phenyl-1H-benzimidazole (HL4) have been used to prepare five different types of new ruthenium(II) arene compounds: (i) monocationic complexes with general formula [(η6-arene)RuCl(κ2-N,N-HL)]Y [HL = HL1, HL2, or HL3; Y Cl BF4; 2-phenoxyethanol (phoxet), benzene (bz), p-cymene (p-cym)]; (ii) dicationic aqua [(η6-arene)Ru(OH2)(κ2-N,N-HL1)](Y)2 (Y...
Commercially available products such as ZnEt2 (1), MgBu2 (2), and n-BuLi (3) can act excellent catalytic precursors for the addition of amines to carbodiimides. Aromatic primary bearing different substituents, secondary amines, heterocyclic undergo this reaction. The synthesis structural characterization zinc guanidinate complex [Zn(Et){(4-t-BuC6H4)N═C(N-i-Pr)(NH-i-Pr)}]2 (15) lithium [Li{(2,4,6-Me3C6H4)N═C(N-i-Pr)(NH-i-Pr)}(THF)] (16), both which catalysts in guanylation reaction, allowed...
The synthesis, structures, and ring-opening polymerization (ROP) activity of heteroscorpionate aluminum alkyl aryloxide complexes are reported. reactions the acetamide thioacetamide protio ligands pbptamH (pbptamH = N-phenyl-2,2-bis(3,5-dimethylpyrazol-1-yl)thioacetamide), pbpamH (pbpamH N-phenyl-2,2-bis(3,5-dimethylpyrazol-1-yl)acetamide), sbpamH (sbpamH N-sec-butyl-2,2-bis(3,5-dimethylpyrazol-1-yl)acetamide), (S)-mbpamH ((S)-mbpamH...
A series of bis-cyclometalated iridium(III) complexes general formula [Ir(ppy)2(N∧N)][PF6] (ppy– = 2-phenylpyridinate; N∧N 2-(1H-imidazol-2-yl)pyridine (1), 2-(2-pyridyl)benzimidazole (2), 1-methyl-2-pyridin-2-yl-1H-benzimidazole (3), 2-(4′-thiazolyl)benzimidazole (4), 1-methyl-2-(4′-thiazolyl)benzimidazole (5)) is reported, and their use as electroluminescent materials in light-emitting electrochemical cell (LEC) devices investigated. [2][PF6] [3][PF6] are orange emitters with intense...
The reaction of the enantiopure NNO-scorpionate ligand (R,R)-bpzmmH with [ZnR2] (R = Me, Et, CH2SiMe3) in a 1:2 molar ratio afforded dinuclear tris-alkyls [Zn(R)(κ2-NNμ-O)Zn(R)2] Me (1), Et (2), CH2SiMe3 (3)). bimetallic 1–3 an aromatic alcohol and thioalcohol yielded zinc complexes containing aryloxide/arylthioxide ligands [(ZnR)2(κN:κN-μ-O)(μ-EAr)] (Ar 2,6-C6H3Me2; E O, R (4), (5), (6); S, (7), (8), (9)) by alcoholysis or thioalcoholysis reaction. structures different compounds were...
Abstract Precise mechanical processing of optical microcrystals involves complex microscale operations viz. moving, bending, lifting, and cutting crystals. Some these can be implemented by applying force at specific points the crystal to fabricate advanced crystalline junctions. Mechanically compliant flexible crystals are ideal candidates for designing such microoptical A vapor‐phase growth naturally bent waveguiding 1,4‐bis(2‐cyanophenylethynyl)benzene ( 1 ) on a surface forming different...
With a sting in its tail: An enantiopure neodymium complex (see scheme) acts as an efficient single-site initiator for the controlled ring-opening polymerization of rac-lactide, forming isotactic polyester. The heteroscorpionate was characterized spectroscopically and by X-ray diffraction.
The reaction of the hybrid scorpionate/cyclopentadienyl lithium salt [Li(bpzcp)(THF)] [bpzcp = 2,2-bis(3,5-dimethylpyrazol-1-yl)-1,1-diphenylethylcyclopentadienyl] with 1 equiv RMgCl proceeds cleanly to give very high yields corresponding monoalkyl κ2-NN-η5-C5H4 magnesium complexes [Mg(R)(κ2-η5-bpzcp)] (R Me 1, Et 2, nBu 3, tBu 4, CH2SiMe3 5, CH2Ph 6). Hydrolysis NH4Cl/H2O in ether affords two previously described regioisomers: (bpzcpH)...
The reaction of bis(3,5-di-tert-butylpyrazol-1-yl)methane (bdtbpzm) with BunLi and carbodiimide derivatives, namely, N,N′-diisopropyl 1-tert-butyl-3-ethyl carbodiimides, gives rise to the new sterically hindered lithium acetamidinate [Li(tbptamd)(THF)] (1) [tbptamd = N-ethyl-N′-tert-butylbis(3,5-di-tert-butylpyrazol-1-yl)acetamidinate] [Li(pbptamd)(THF)] (2) [pbptamd N,N′-diisopropylbis(3,5-di-tert-butylpyrazol-1-yl)acetamidinate]. Subsequent hydrolysis 1 2, recently reported...
The synthesis and full characterization of the new aqua-complex [(η6-p-cymene)Ru(OH2)(κ2-N,N-2-pydaT)](BF4)2, [2](BF4)2, nucleobase derivative [(η6-p-cymene)Ru(9-MeG)(κ2-N,N-2-pydaT)](BF4)2, [4](PF6)2, where 2-pydaT = 2,4-diamino-6-(2-pyridyl)-1,3,5-triazine 9-MeG 9-methylguanine, are reported here. crystal structures both [4](PF6)2 chloro complex [(η6-p-cymene)RuCl(κ2-N,N-2-pydaT)](PF6), [1](PF6), have been elucidated by X-ray diffraction. former provided relevant information regarding...
The chiral and the enantiopure bis(pyrazol-1-yl)methane-based NNO-donor scorpionate ligands in form of alcohol compounds (bpzbeH) [bpzbe = 1,1-bis(3,5-dimethylpyrazol-1-yl)-3,3-dimethyl-2-butoxide], (bpzteH) [bpzte 2,2-bis(3,5-dimethylpyrazol-1-yl)-1-para-tolylethoxide], (R,R)-bpzmmH {(R,R)-bpzmm (1R)-1-[(1R)-6,6-dimethylbicyclo[3.1.1]-2-hepten-2-yl]-2,2-bis(3,5-dimethylpyrazol-1-yl)ethoxide} have been utilized to obtain new NNO-scorpionate zinc alkyl complexes. reaction bpzbeH, bpzteH...
The work described here represents the first example of an enantiopure hybrid scorpionate/cyclopentadiene ligand. ligand was obtained in a one-pot synthetic procedure by efficient and highly diastereoselective nucleophilic addition organolithium reagent to electrophilically activated olefin new fulvene with chiral substrate control stereochemistry newly created asymmetric center. We verified potential utility this as valuable scaffold that is able induce chirality organometallic/coordination...
New bifunctional aluminum complexes have been prepared with the aim of studying effect a counterion on synthesis cyclic carbonates from epoxides and carbon dioxide (CO2). Neutral ligand 1 was used as precursor to obtain four novel mesylate, chloride, bromide, iodide zwitterionic NNO ligands (2–5). The reaction these or 2 equiv AlR3 (R = Me, Et) allowed mono- bimetallic [AlR2(κ2-mbpzappe)]X [X Cl, R Me (6), Et (7); X Br, (8), (9); I, (10), (11)] [{AlR2(κ2-mbpzappe)}(μ-O){AlR3}]X MeSO3, (12),...
The preparation of the first racemic bis(pyrazol-1-yl)methane-based NNCp-donor hybrid scorpionate/cyclopentadienyl magnesium and zinc complexes [Mg(R)(κ2-η5-NNCp)] (1–6) [NNCp = bpztcp, R Me (1), Et (2), CH2SiMe3 (3); bpzpcp, (4), (5), (6)] [Zn(R)(κ2-η1-NNCp)] (7–12) (7), (8), (9); (10), (11), (12)] has been carried out by reaction corresponding NNCp-H-donor scorpionate pro-ligands with Grignard reagents RMgCl, after deprotonation nBuLi, or directly ZnR2. resulting alkyl have employed in a...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Reactivity of Hydridotris(pyrazolyl) Borate Dihydrogen Ruthenium ComplexesBeatriz Moreno, Sylviane Sabo-Etienne, Bruno Chaudret, Ana Rodriguez, Felix Jalon, Swiatoslaw TrofimenkoCite this: J. Am. Chem. Soc. 1995, 117, 28, 7441–7451Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Published inissue 1 July...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure-activity relationship in the gastric cytoprotective effect of several sesquiterpene lactonesOscar S. Giordano, Mauricio J. Pestchanker, Eduardo Guerreiro, Jose R. Saad, Ricardo D. Enriz, Ana M. Rodriguez, Esteban A. Jauregui, Jorge Guzman, Alejandra O. Maria, and Graciela H. WendelCite this: Med. Chem. 1992, 35, 13, 2452–2458Publication Date (Print):June 1, 1992Publication History Published online1 May 2002Published inissue 1 June...
Abstract A new and safer methodology has been developed for the synthesis of bis(pyrazol‐1‐yl)methane ligands (NN). Several containing different phenyl groups on central carbon atom have obtained. Ruthenium derivatives type [Ru(arene)Cl(NN)]BPh 4 (arene = benzene, p ‐cymene) synthesised using these ligands. One or two isomers that differ regarding axial equatorial disposition group metallacycle Their formation is rationalised by considering steric effects. The structures five were determined...
New coordination polymers have been obtained by the self-assembly of silver salts AgX (X = BF 4, PF 6, CF 3SO 3) and 2,4-diamino-6-R-1,3,5-triazines L (R phenyl p-tolyl) formulas AgLX ( 1- 6). A complex different stoichiometry, [Ag 3L 2(H 2O)(acetone) 2](BF 4) 3, 7 phenyl), has also synthesized. The three-dimensional structures five compounds determined X-ray diffraction studies. For complexes, when X 4 R or p-tolyl, chiral chains with alternating Ag are formed. cross-linked counteranions in...