
M Fátima C Guedes da SilvaInstituto Superior Técnico, University of Lisbon · Centro de Química Estrutural
M Fátima C Guedes da Silva
PhD in Chemical Engeneering
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December 2014 - present
Instituto Superior Técnico, Universidade de Lisboa
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- Professor
Position
- Professor
January 1989 - present
Publications
Publications (456)
A series of six complexes [n‐Bu2Sn(L¹)]⋅S (S=Benzene/toluene, mixed/partial) (1), [Ph2Sn(L¹)]n⋅S (S=Benzene) (2), [Bz2Sn(L¹)] (3), [n‐Bu2Sn(L²)]n (4), [Ph2Sn(L²)] (5) and [Bz2Sn(L²)] (6) were synthesized using diorganotin(IV) oxide precursors and two new bis‐Schiff bases containing N2O2 donor atoms. The Schiff bases, H2L¹ and H2L², were prepared by...
The novel hydrosoluble silver coordination polymer [Ag(NO3)(μ-1κN;2κN′,N″-TPMOH)]n (1) (TPMOH = tris(1H-pyrazol-1-yl)ethanol) was obtained and characterized. While single crystal X-ray diffraction analysis of compound 1 disclosed an infinite 1D helical chain structure in the solid state, NMR analysis in polar solvents confirmed the mononuclear natu...
Novel hydrosoluble coordination compounds based on arylhydrazones of β-diketones and bearing first row transition metals, namely [Mn(μ-1κO1,2κO2-HL1)2(H2O)2]n (1) and [Cu(κO1O2N-L2)(DEA)] (2; DEA = diethanolamine), were synthesised and characterized. Their structural features were investigated using single crystal X-ray diffraction. The catalytic p...
The multitopic heterofunctional pro-ligand 4-[(E)-(1H-imidazol-2-yl)diazenyl]benzoic acid (H′HL) was synthesized by diazotization of 4-aminobenzoic acid followed by coupling with imidazole. Reactions of H′HL (where H = imidazole proton and H′ = carboxylic acid proton) with the triorganotin precursors ⁿPr3SnCl, (ⁿBu3Sn)2O and Ph3SnOH provided three...
Convenient self‐assembly synthesis of copper(II) complexes via double (phenylsilsesquioxane and acetate) ligation allows to isolate a family of impressive sandwich‐like cage compounds. An intriguing feature of these complexes is the difference in the structure of a pair of silsesquioxane ligands despite identical (Cu6) nuclearity and number (four)...
The small cage-like hydrophilic aminophosphine 1,3,5-triaza-7-phosphaadamantane (PTA) and its derivatives have received a remarkable and renewed interest due to their aptitude to solubilize transition metal complexes in aqueous medium. This chapter outlines the synthetic strategies that have been used to obtain copper complexes bearing PTA and rela...
In this study, we report the synthesis and comprehensive characterization of two novel pyrene-appended Schiff base organotin(IV) compounds, trimethylstannyl (E)-4-((pyren-1-ylmethylene)amino)benzoate (1) and triphenylstannyl (E)-4-((pyren-1-ylmethylene)amino)benzoate (2). They were synthesized through the...
We present the synthesis and characterization of two monometallic coordination polymers, [Co(L)2(H2O)2]n (Co-CP) and [Ni(L)2(H2O)2]n (Ni-CP), alongside a heterobimetallic counterpart, CoNi-CP, derived from an amide-based multifunctional pro-ligand 4-(pyrimidin-5-ylcarbamoyl)benzoic acid (HL)...
An unprecedented method has been developed to obtain heterometallic‐organophosphine frameworks (HMOPFs) through a solvent‐free, three‐component mechanochemical process. In a ball mill, mixing copper (I) bromide with zinc (II), nickel (II) or copper (II) acetates, in the presence of (PTA‐CH2‐C6H4‐p‐COOH) Br (PTA is 1,3,5‐triaza‐7‐phosphaadamantane)...
Oxygen evolution reaction (OER) electrocatalysts are frequently made from noble metal-based oxides like platinum and ruthenium/iridium oxides. However, because of their scarcity and high price, researchers are now focusing on...
Diorganotin(IV) complexes of composition [Me2SnL] (1), [n‐Bu2SnL] (2), and [Bz2SnL] (3) were synthesized by reacting the N²,N⁶‐di(pyridin‐2‐yl)pyridine‐2,6‐dicarboxamide pro‐ligand (H2L, where H2 denotes the two acidic protons) with Me2SnO, n‐Bu2SnO, and Bz2SnO, respectively, in refluxing toluene. The amide ligand leads to highly stable diorganotin...
The possibility of creating a chiral center directly from two C—H bonds, or from a C—H bond and an X—H bond (X = heteroatom), without any prior derivatization (e.g., the installation of a leaving group) opens up many new possibilities in synthesis. Many chiral ligands and organocatalysts have now been discovered to be compatible with the oxidizing...
Reacting the alkylated 1,3,5-triaza-7-phosphatricyclo[3.3.1.1]decane (PTA), namely (PTA-CH2-C6H4-p-COOH)Br (1) or (PTA-CH2-C6H3-p-OH-m-CHO)Cl (2), with CuBr, CuI or [Cu(CH3CN)4]BF4, under mild conditions using different stoichiometric ratios resulted in the formation of the new water soluble copper complexes [CuBr2(PTA-CH2-C6H4-p-COOH)2]X (X = Br {...
Two new anthracene Schiff base triorganotin (IV) compounds trimethylstannyl(E)‐4‐((anthracen‐9‐ylmethylene)amino)benzoate (1) and triphenylstannyl(E)‐4‐((anthracen‐9‐ylmethylene)amino)benzoate (2) were synthesized by mixing trimethylstannyl (or triphenylstannyl) 4‐aminobenzoate and 9‐anthraldehyde in anhydrous toluene under refluxing conditions. El...
A small family of nonanuclear Cu5Cs4-based phenylsilsesquioxanes 1-2 were prepared by a convenient self-assembly approach and characterized by X-ray diffraction studies. The compounds 1 and 2 show some unprecedented structural features such as the presence of a [Ph14Si14O28]14- silsesquioxane ligand and a CuII5CsI4 nuclearity in which the metal cat...
New organotin compounds with general formula [(PTA-CH2-C6H4-p-COO)SnR3]Br (where R is Me for 3 and Ph for 4; PTA = 1,3,5-triaza-7-phosphaadamantane), bearing the methylene benzoate PTA derivative, were synthesized through a mild two-step process. The compounds were characterized by Fourier transform infrared spectroscopy, electrospray ionization ma...
The reaction of 2-(2-(dicyanomethylene)hydrazineyl)benzoic acid (H2L1) with copper(II) acetate in the absence or presence of imidazole (im), 4,4'-bipyridine (4,4'-bipy) or pyridine (py) leads to the new complexes [Cu2(CH3OH)2(μ-L1a)2] (1), [Cu(L1a)(im)] (2), [Cu(L1a)(H2O)(4,4'-bipy)]∙H2O (3) or [Cu(L1a)(py)]n (4), respectively, where (L1a)2− = (Z)-...
A mixture of the organomanganese precursor [CpMe-Mn(CO)3] and the amido-phosphine 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane (DAPTA) has been utilized in a highly efficient homogeneous catalytic process for the cyanosilylation of aromatic and aliphatic aldehydes in glycerol and under solvent-free conditions. A catalyst loading as low a...
Two tetranuclear and two mononuclear Cu(II) complexes with arylhydrazones of malononitrile derived ligands (compounds 1–2 and 3–4, respectively), one trinuclear Co(II/III) complex with an arylhydrazone of acetoacetanilide (5) and one tetranuclear Zn(II) complex of 3-(2-carboxyphenyl-hydrazone)pentane-2,4-dione (6) were screened as potential catalys...
In accordance with UN's Sustainable Development Goal (UN's SDG) 12 which encompasses the sustainable use of chemical products and a sound circular economy, this work is focused on the synthesis of Co(ii), Ni(ii) and Mn(ii) complexes bearing combined 1,3,5-triaza-7-phosphaadamantane and benzyl terpyridine core moieties (PTA–Bztpy) as ligand, followe...
A series of vanadium(V) aroylhydrazine-arylolates is employed in ethylene
polymerization to produce ultra-high molecular weight polyethylene
(UHMWPE), surprisingly extending to such coupling reactions beyond their
common usage in the oxidation of hexanes and alcohols. Activated by either
MAO or DMAC, the complexes V1–V3 efficiently catalyze the pol...
The chalcogen bond (ChB) is defined as a noncovalent interaction between the electron density deficient region (so-called as σ or π hole) of a covalently bonded chalcogen atom and a nucleophilic (Nu) site in the same (intramolecular) or another (intermolecular) molecular entity: R–Ch⋯Nu [Ch = O, S, Se or Te; R = C, Pn (pnictogen), Ch, metal, etc.;...
The vanadium(V) complexes bearing the aroylhydrazone Schiff base 2-hydroxy-N'-((2-hydroxynaphthalen-1-yl)methylene)benzohydrazide ligand [VO(OMe)L] (1) and [Et3NH][VO2L] (2) were synthesized, characterized and supported on porous MIL-100(Fe) forming the 1@MIL-100(Fe) and 2@MIL-100(Fe) composites. The outcome of such immobilizations was assessed by...
The new copper(II) complexes [Cu(μ-1κO:2κONN′-HL1)(μ-1κO:2κO′-NO3)]2.[Cu(μ-1κO:2κONN′-HL1)(CH3OH)]2(NO3)2 (1) and [Cu(κONN′-HL2)(μ-1κOO’:2κO′-NO3)]n (2), derived from the new pro-ligands H2L1 = 2-(5,6-dihydroindolo[1,2-c]quinazolin-6-yl)-5-methylphenol and H2L2 = 2-(5,6-dihydroindolo[1,2-c]quinazolin-6-yl)-4-nitrophenol, were synthesized and charac...
The O,N,S-tris-chelating ligand, H2NSCN-N=C(H)ArO⁻ constitutes an attractive scaffold in coordination chemistry and we have expanded this scaffold by installing an alkyl group of different steric hindrance. Thus, the ligand scaffolds containing O,N,S (Lⁿ) differ with respect to the chemical link between the coordinating O atoms, which is either a p...
The aroylhydrazone Schiff bases 2-hydroxy-N’-(1-(pyrazin-2-yl)ethylidene)benzohydrazide and N,N'-bis(2-hydroxybenzylidene)oxalohydrazide, have been used to synthesize the dinuclear complexes [VO(HL¹)(µ-O)]2 (1) and [{VO(OEt)(EtOH)}2(L²)] (2)·2H2O. Complex 1 is newly synthesized and 2 was reported earlier. Structural characterization of 1 was accomp...
The replacement of conventional organic solvents by the so-called “green solvents” is a usual approach to more sustainable chemical processes. Supercritical carbon dioxide (scCO2) has been successfully regarded as a candidate for such a purpose. Moreover, it possesses moderate critical pressure and temperature conditions and may be easily separated...
In the present work, we have synthesized and characterized two novel Cd(II) coordination polymers, [Cd4(L1)4(DMF)6]n.3n(DMF) (1) and [Cd2(L2)2(DMF)3]n.2n(DMF) (2), and studied their catalytic application. They were synthesized via solvothermal reaction...
A supported gold nanoparticle-catalyzed strategy has been utilized to promote a click chemistry reaction for the synthesis of 1,2,3-triazoles via the azide-alkyne cycloaddition (AAC) reaction. While the advent of effective non-copper catalysts (i.e., Ru, Ag, Ir) has demonstrated the catalysis of the AAC reaction, additional robust catalytic systems...
The N-alkylation of 1,3,5-triaza-7-phosphaadamantane (PTA) with ortho-, meta- and para-substituted nitrobenzyl bromide under mild conditions afforded three hydrophilic PTA ammonium salts, which were used to obtain a new set of seven water-soluble copper(I) complexes. The new compounds were fully characterized and their catalytic activity was invest...
Lanthanide complexes have attracted a widespread attention due to their structural diversity, as well as multifunctional and tuneable properties. The development of lanthanide based functional materials has often relied on the design of the secondary coordination sphere of the corresponding lanthanide complexes. For instance, usually simple lanthan...
Lanthanide complexes have attracted a widespread attention due to their structural diversity, as well as multifunctional and tunable properties. The development of lanthanide based functional materials has often relied on the design of the secondary coordination sphere of the corresponding lanthanide complexes. For instance, usually simple lanthani...
Peroxides form an important class of chemicals in which two oxygen atoms are linked together by a single covalent bond (R−O−O−R, R=H, SO3K, alkyl, etc.), with a wide range of applications in medicine, industry, environmental protection, etc. The current version of the Cambridge Structural Database reveals more than 1400 structurally characterized m...
The self-assembly reaction of the Schiff base N,N'-ethylenebis(2-hydroxyacetophenoneimine) (H2L), CoCl2•6H2O and [SnPh2Cl2] led to the alkoxo-bridged heteroorganometallic CoIIISnIV complex [{SnPhCl2}(1κO²:2κO²N²-μ-L)(μ-OMe){CoPh}]•CH3OH•H2O (1) or [{SnPhCl2}(1κO²:2κO²N²-μ-L)(μ-OEt){CoPh}] (2) in MeOH or EtOH, respectively. The structures of these c...
Oxidovanadium(V) and dioxidovanadium(V) compounds, [VO(OEt)L] (1) and [Et3NH][VO2L] (2), were synthesized using an aroylhydrazone Schiff base (5-bromo-2-hydroxybenzylidene)-2-hydroxybenzohydrazide (H2L). They were characterized by elemental analysis, Fourier-transform infrared spectroscopy (FT-IR), (1H and 51V) nuclear magnetic resonance (NMR), ele...
The new sterically hindered amido-phosphane 1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane-3,7-diylbis(phenylmethanone), DBPTA (1), has been obtained via an open-cage double N-acylation of 1,3,5-triaza-7-phosphadamantane (PTA) using benzoic anhydride. DBPTA is the only acyl derivative of PTA that contains an aromatic appendage. Due to the bulky nature...
Similarly to the case of the halogen atoms (F, Cl, Br, or I), the electron‐deficient surface (on the outer side of a covalently bonded atom, on the extension of the bond) of the group 16 atoms (O, S, Se, or Te) can also act as an electrophilic species toward a nucleophilic region, in another or in the same molecule, leading to a chalcogen bond. In...
The new coordination polymers (CPs) [Zn(μ-1κO1:1κO2-L)(H2O)2]n·n(H2O) (1) and [Cd(μ4-1κO1O2:2κN:3,4κO3-L)(H2O)]n·n(H2O) (2) are reported, being prepared by the solvothermal reactions of 5-{(pyren-4-ylmethyl)amino}isophthalic acid (H2L) with Zn(NO3)2.6H2O or Cd(NO3)2.4H2O, respectively. They were synthesized in a basic ethanolic medium or a DMF:H2O...
One-pot reaction of the Schiff base N,N’-ethylene bis(salicylaldimine) (H2L), CoCl2.6H2O, and [Ph2SnCl2] in acetone produces the mixed valence CoIICoIII2 compound [CoIICoIII2(μ-L)2(Ph)2(μ-Cl)2]·(CH3)2CO·H2O (1). Our recent study already revealed that the same reaction mixtures in methanol or ethanol produced a heterometallic SnIVCoIII (2) or monome...
Two new benzimidazole Schiff base copper(II) compounds [Cu(5-CH2PPh3-2-salmethylben)(NO3)(H2O)][BF4].2/3(H2O).1/3(MeOH) (1) and [Cu(5-CH2NEt3-2-salmethylben)(Cl)][BF4] (2) were synthesised by mixing 2-(1-methyl-1H-benzo[d]imidazol-2-yl)aniline, (3-formyl-4-hydroxybenzyl)triphenylphosphonium chloride or N,N-diethyl-N-(3-formyl-4-hydroxybenzyl)ethana...
A tetranuclear Cu(II) cubane [Cu2(μ-1κONO’:2κOO’:3κO-HL)(μ-1κONO’:2κOO’-HL)]2‧4dmf (1) derived form (2,3-dihydroxybenzylidene)-2-hydroxybenzohydrazide (H3L) was synthesized at room temperature and characterized by elemental analysis, IR spectroscopy, ESI-MS and single crystal X-ray diffraction. The known tetranuclear Cu(II) open-cubane [Cu(HL)]4‧4E...
A set of Cu(I) complexes with 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo-[3.3.1]nonane (DAPTA) phosphine ligands viz. [CuX(κP-DAPTA)3] (1: X = Br; 2: X = I) and [Cu(μ-X)(κP-DAPTA)2]2 (3: X = Br; 4: X = I) were immobilized on activated carbon (AC) and multi-walled carbon nanotubes (CNT), as well as on these materials after surface functionalization....
The new 1D CPs [Zn(L1)(H2O)4]n.nH2O (1) and [Zn(L2)(H2O)2]n (2) [L1 = 1,1′-(ethane-1,2-diyl)bis(6-oxo-1,6-dihydropyridine-3-carboxylic acid); L2 = 1,1′-(propane-1,3-diyl)bis(6-oxo-1,6-dihydropyridine-3-carboxylic acid)] were prepared from flexible dicarboxylate pro-ligands (H2L1 and H2L2). Both CPs 1 and 2 were characterized by elemental, FTIR, and...
The 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane (DAPTA) derivatives, viz. the already reported 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane 5-oxide (DAPTA=O, 1), the novel 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane-5-sulfide (DAPTA=S, 2), and 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane-5-selenide (DAP...
Reactions of carbamodithiolate salts viz., c-C3H5NH3⁺(L¹)⁻ and c-C6H11NH3⁺(L²)⁻ (L¹ = cyclopropylcarbamodithioate, L² = cyclohexylcarbamodithioate) with R2SnCl2 (R = Me or n-Bu) were investigated in dichloromethane for the first time. A series of four diorganotin(IV) complexes of composition [Me2Sn(L¹)Cl] (1), [Me2Sn(L¹)2] (2), [Me2Sn(L²)2] (3) and...
Quaternary ammonium salts bearing different alkyl chains and hydroxyl groups were synthesized and tested for the first time as co-catalysts in the cycloaddition reaction between CO2 and propylene oxide. Their synergetic catalytic effect together with the known tetranuclear zinc(II) complex [Zn4(μ3-OH)2 (1κO:2κO-HL)4(κO-HL)2(H2O)4] (1), H2L = 3-(2-c...
Inter‐ and intramolecular noncovalent interactions play a significant role in many chemical and biological processes. In fact, the essential processes of life occur and operate mainly via noncovalent interactions between biomolecules. This chapter illustrates the crucial role of noncovalent interactions in the synthesis of nonaromatic N‐heterocycli...
Vanadium is one of the more abundant elements in the Earth’s crust and exhibits a wide range of oxidation states in its compounds making it potentially a more sustainable and more economical choice as a catalyst than the noble metals. A wide variety of reactions have been found to be catalysed by homogeneous, supported and heterogeneous vanadium co...
In this study, the mononuclear Fe(III) complex [Fe(HL)(NO3)(H2O)2]NO3 (1) derived from Nʹ-acetylpyrazine-2-carbohydrazide (H2L) was synthesized and characterized by several physicochemical methods, e.g., elemental analysis, infrared (IR) spectroscopy, electrospray ionization mass spectrometry (ESI-MS), and single crystal X-ray diffraction analysis....
The synthesis, crystal structures and magnetic properties are reported for three novel mixed-valence tetranuclear [MnII2MnIII2(HBuDea)2(BuDea)2(EBA)4] (1), [MnII2MnIII2(HBuDea)2(BuDea)2(DMBA)4] (2) and undecanuclear [MnII3MnIII8O4(OH)2(BuDea)6(DMBA)8] (3) clusters, where H2BuDea is N-butyldiethanolamine, HEBA is 2-ethylbutyric acid and HDMBA is 2,2...
The small air-stable hydrophilic aminophosphine 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane (DAPTA) has received a remarkable interest during the last two decades due to its aptitude to form metal complexes in water. Water-solubility of transition metal complexes based on DAPTA allowed their application as catalysts in homogeneous aqueo...
The new CPs [Zn(-1OO’:2N-L)(H2O)(BDC)0.5]n.n(DMF) (1), [Cd(-1O:2N-L)2(H2O)2]n (2) and [Pb(-1OO’:2O’-L)(-1O:2O’:3N-L)]n (3) [L = 4-(pyridin-3-ylcarbamoyl)benzoate; BDC = benzene-1,4-dicarboxylate] were synthesized and characterized by elemental, FT-IR, powder and single-crystal X-ray diffraction analyses. Single crystal X-ray diffractio...
The new Au(III) complex [AuCl2(Tpms)] (1) and the previously reported [AuCl2(Tpm)]Cl (2), bearing the potentially tridentate ligands tris(1-pyrazolyl)methanesulfonate (SO3C(C3H3N2)3⁻, Tpms) or hydrotris(1-pyrazolyl)methane (HC(C3H3N2)3, Tpm), respectively, were synthesized in water at room temperature and characterized using NMR and IR spectroscopy...
A series of eight novel diorganotin(IV) complexes with heteroditopic pyridyl-ONO′-ligands were prepared viz., [Me2Sn(L¹)]2⋅2(H2O) (1), [n-Bu2Sn(L¹)]2 (2), [Ph2Sn(L¹)] (3), [Me2Sn(L²)]2⋅2(H2L²) (4), [n-Bu2Sn(L²)]2 (5), [Ph2Sn(L²)]⋅0.5(C6H6) (6), [Me2Sn(L³)]2 (7) and [n-Bu2Sn(L³)]2 (8) and structurally characterized. Irrespective of the type of diazo...
The mononuclear zinc(II) complex cis-[ZnL2(H2O)2] (1; L = 4-(pyridin-3-ylcarbamoyl)benzoate) was synthesized and characterized. By soaking crystals of 1 in a mixture of DMF-H2O solution containing a slight excess of Cu(NO3)2 × 3H2O a transmetalation reaction occurred affording the related copper(II) complex trans-[CuL2(H2O)2] (2). The structures of...
Solvothermal reactions between a pyridine based amide functionalized dicarboxylic acid, 4,4'-{(pyridine-2,6-dicarbonyl)bis(azanediyl)}dibenzoic acid (H2L), and zinc(II) nitrate in absence and presence of base produced the binuclear metallomacrocyclic compound [Zn2(L)2(H2O)4].2(H2O).6(DMF) (1) and the metallomacrocyclic based two dimensional MOF [Zn...
The development of cross-dehydrogenative coupling in recent years has simplified the
synthesis of many materials, as a result of facile C–H activation, which, together with its greater atom economy and environmental friendliness, has made an impact on modern organic chemistry.
Indeed, many C–C and C–X (X = N, O, P, S, B, or Si) coupling reactions c...
The development of cross-dehydrogenative coupling in recent years has simplified the synthesis of many materials, as a result of facile C–H activation, which, together with its greater atom economy and environmental friendliness, has made an impact on modern organic chemistry. Indeed, many C–C and C–X (X = N, O, P, S, B, or Si) coupling reactions c...
The aroylhydrazone Schiff bases 2-hydroxy(2-hydroxybenzylidene)benzohydrazide (H2L1) and 2-amino(2-hydroxybenzylidene)benzohydrazide (H2L2) have been used to synthesize the new Cd(II) coordination polymer [Cd(-1ONO’:2O:3O’’-L1)(DMF)]n (1) and the dinuclear complex [Cd(1ONO’:2O-HL2)(OO’-Ac)]2·2DMF (2). Both 1 and 2 have been characterized by...
The new 3D metal-organic frameworks (MOFs) [Co(1κN;2κOO′-μ-L)2]n.4n(DMF).1.5n(H2O) (1) and [Zn2(1κN;2κO-μ-L)2(κO⁴-μ4-BTC)]n.3n(DMF).2n(H2O) (2) [L = 4-(pyridin-4-ylcarbamoyl)benzoate; BTC = benzene-1,3,5-tricarboxylate] have been synthesized from the pyridyl amide functionalized benzoic acid (HL). They were characterized by elemental, FT-IR, powder...
Polyolefins account for two thirds by weight of the global synthetic polymers. There are more than 300 grades of commercial polyolefins, whose properties depend on their microstructures being varied according to the type of catalyst used in the production process and ultimately on the final method of manufacture. Despite having catalytic activities...
Three new 6-methyl-2-oxo-1,2-dihydroquinoline-3-carbaldehyde-thiosemicarbazones-N-4-substituted pro-ligands and their Cu(II) complexes (1, -NH2; 2, -NHMe; 3, -NHEt) have been prepared and characterized. In both the X-ray structures of 1 and 3, two crystallographically independent complex molecules were found that differ either in the nature of weak...