A5084226540- Metal complexes synthesis and properties
- Organometallic Complex Synthesis and Catalysis
- Vanadium and Halogenation Chemistry
- Metal-Catalyzed Oxygenation Mechanisms
- History and advancements in chemistry
- Oxidative Organic Chemistry Reactions
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Asymmetric Hydrogenation and Catalysis
- Magnetism in coordination complexes
- Origins and Evolution of Life
- Chemical Synthesis and Reactions
- Carbon dioxide utilization in catalysis
- Lanthanide and Transition Metal Complexes
- Polyoxometalates: Synthesis and Applications
- Chemical Thermodynamics and Molecular Structure
- Electrochemical Analysis and Applications
- Chemical Reaction Mechanisms
- Inorganic and Organometallic Chemistry
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Analytical Chemistry and Chromatography
- Molecular Junctions and Nanostructures
- Synthesis and characterization of novel inorganic/organometallic compounds
- Radioactive element chemistry and processing
- Crystallography and molecular interactions
Instituto Superior Técnico
2003-2013
University of Lisbon
2001-2012
Instituto Politécnico de Lisboa
2001-2011
Polytechnic Institute of Porto
2009
Universidade Lusófona
2001-2008
Universidad de Oviedo
2001
University of Padua
2001
Universidad de Murcia
2001
École Normale Supérieure - PSL
1996
Centre National de la Recherche Scientifique
1996
Vanadium(IV or V) complexes with N,O- O,O-ligands, i.e., [VO{N(CH2CH2O)3}], Ca[V(HIDPA)2] (synthetic amavadine), Ca[V(HIDA)2], [Bu4N]2[V(HIDA)2] [HIDPA, HIDA = basic form of 2,2'-(hydroxyimino)dipropionic -diacetic acid, respectively], [VO(CF3SO3)2], Ba[VO(nta)(H2O)]2 (nta nitrilotriacetate), [VO(ada)(H2O)] (ada N-2-acetamidoiminodiacetate), [VO(Hheida)(H2O)] (Hheida 2-hydroxyethyliminodiacetate), [VO(bicine)] [bicine N,N-bis(2-hydroxyethyl)glycine], and [VO(dipic)(OCH2CH3)] (dipic...
Although its biological function is still unknown, the naturally occurring vanadium complex amavadine may be suitable for industrial applications: This compound (as well as other VIV and VV complexes with N,O O,O ligands) are shown to act catalysts direct conversion of methane into acetic acid, without requiring CO, under very mild conditions in high yields (see scheme).
The hydrolysis of sterically hindered and unhindered alkyl nitriles, also benzyl phenyl nitriles RCN (R = Me, CH(2)Cl, Et, n-Pr, i-Pr, n-Bu, t-Bu, p-MeOC(6)H(4)CH(2), Ph), to carboxamides is catalyzed by a novel system superior simplicity consisting cheap, widely commercially available, rather environmentally friendly compounds, that is, ZnX(2)/ketoxime combination, but it does not proceed at all with either the zinc salt or ketoxime taken alone. nature anion X(-) in (X NO(3), Cl,...
A convenient and clean route to transform, in aqueous medium, various alkanes carboxylic acidsvia single-pot carboxylation with CO water, under mild conditions, has been achieved, proceeding efficiently selectively even without any metal catalyst acid additive, at low temperatures; the relevant hydroxylating role of H2O radical mechanisms are disclosed by radical-trap, H218O DFT studies.
A facile, efficient and selective solvent-free synthesis of ketones from secondary alcohols with tert-butylhydroperoxide (TBHP) as the oxidant under microwave irradiation is achieved, where copper(II) 2,4-alkoxy-1,3,5-triazapentadienato complexes are catalysts providing high yields (up to 100%), TONs 890) TOFs 1780 h−1).
Synthetic amavadine models, [V(HIDPA)2]2− and [V(HIDA)2]2− [where HIDPA HIDA stand for the basic forms of 2,2′-(hydroxyimino)dipropionic 2,2′-(hydroxyimino)diacetic acid, respectively], exhibit haloperoxidase- or peroxidase-type activities, act as catalysts selective peroxidative monohalogenation, hydroxylation oxo-functionalization alkanes aromatic compounds such benzene mesitylene at room temperature.
The ligated benzonitriles in the platinum(II) complex [PtCl2(PhCN)2] undergo metal-mediated [2 + 3] cycloaddition with nitrones -ON+(R3)=C(R1)(R2) [R1/R2/R3 = H/Ph/Me, H/p-MeC6H4/Me, H/Ph/CH2Ph] to give delta 4-1,2,4-oxadiazoline complexes, [PtCl2(N=C(Ph)O-N(R3)-C(R1)(R2))2] (2a, 4a, 6a), as a 1:1 mixture of two diastereoisomers, 60-75% yields, while [PtCl2(MeCN)2] is inactive toward addition. However, strong activation acetonitrile was reached by application platinum(IV) [PtCl4(MeCN)2] and...
Abstract Two structurally related bis(imidoylamidine or 1,3,5‐triazapentadiene)nickel(II) compounds {Ni[HN=C(3‐py)NC(3‐py)=NH] 2 } · H O MeOH ( 1 ) and [Ni{HN=C(3‐py)N(H)C(3‐py)=NH} ]Cl with symmetrical 3‐pyridyl (3‐py) substituents have been prepared by direct 2‐butanone oxime mediated transformation of 3‐cyanopyridine in the presence Ni(MeCO 4H NiCl 2H O, respectively. Compounds characterized elemental analyses, IR, 13 C{ H} NMR spectroscopy, FAB + mass spectrometry, while their slow...