Laura Rodriguez | Universitat de Barcelona (original) (raw)
Papers by Laura Rodriguez
Sound quality techniques are currently becoming more important, as they take into account the hum... more Sound quality techniques are currently becoming more important, as they take into account the human perception of sound. By now, there is no well established international standards for measuring sound quality and no well recognizable reference index for its assessment. Then ...
a química és la ciència que estudia les transformacions de la matèria i la vida és la seva manife... more a química és la ciència que estudia les transformacions de la matèria i la vida és la seva manifestació més important. És una ciència de transferències, un centre de comunicació, un pas entre allò que és senzill i el que és complex, entre les lleis de la física i les de la vida.
Dalton Trans., 2015
Mono-and dinuclear Cu(II) complexes were prepared with pseudopeptidic open chain and macrocyclic ... more Mono-and dinuclear Cu(II) complexes were prepared with pseudopeptidic open chain and macrocyclic ligands, respectively. They were characterized by UV-vis spectroscopy, EPR, HRMS and X-ray diffraction.
Inorganica Chimica Acta, 2015
Four Zn-salophen complexes that differ for the electrodonating/electrowithdrawing character of th... more Four Zn-salophen complexes that differ for the electrodonating/electrowithdrawing character of the substituents located in the positions para to the phenolic oxygens have been used for the molecular recognition of several anions. Spectrophotometric and spectrofluorimetric titrations carried out in ethanol show for three of them strong binding affinity and also marked selectivity in the recognition of ATP 4À , when methoxy electrodonating substituents are present. The finding that a Zn-salophen derivative with overall electrodonating (ÀI < +R) substituents is a more selective receptor for this anion than those decorated with electron withdrawing groups, support the occurrence in this case of supramolecular p-p stacking interactions between the adenosine residue and the aromatic ligand surface that counterbalance the decrease in electrophilicity of the metal center.
Organometallics, 2011
ABSTRACT New neutral and anionic fluoroaryl gold(I) complexes featuring terminal pyridine rings w... more ABSTRACT New neutral and anionic fluoroaryl gold(I) complexes featuring terminal pyridine rings were prepared following different strategies. The homoleptic anionic compounds NBu4[Au(C5F4N)2] (1) and NBu4[Au(C6F4py)2] (2) were obtained by reacting [AuCl(tht)] (tht = tetrahydrothiophene) with the organolithium derivatives of BrC5F4N and BrC6F4py, respectively. This route required the previous synthesis of the new fluorinated compound BrC6F4py, which was produced by a Stille cross-coupling between (4-pyridyl)trimethylstannane and 1,4-dibromotetrafluorobenzene. The neutral phosphane compounds [Au(C6F4N)(PPh3)] (3) and [Au(C6F4py)(PPh3)] (4) were obtained by treatment of [AuCl(PPh3)] with the organolithium reagents LiC6F4N and LiC6F4py, respectively. However, this synthetic strategy failed for organogold compounds containing a polyphosphane ligand. Consequently, an alternative synthetic procedure, based on displacement reactions of the weakly coordinated tht ligand from [Au(C6F4py)(tht)] by the appropriate polyphosphane, was undertaken. Thus, the following complexes were isolated and characterized: [(AuC6F4py)2(μ2-diphosphane)] [diphosphane = bis(diphenylphosphanyl)methane (dppm) (9), 2,2-bis(diphenylphosphanyl)propane (dppip) (10), 1,2-bis(diphenylphosphanyl)ethane (dppe) (11), trans-1,2-bis(diphenylphosphanyl)ethylene (dppet) (12), 1,2-bis(diphenylphosphanyl)acetylene (dppa) (13), 1,3-bis(diphenylphosphanyl)propane (dppp) (14), 1,4-bis(diphenylphosphanyl)butane (dppb) (15), 4,4′-bis(diphenylphosphanyl)-1,1′-biphenyl (dppdph) (16)], [(AuC6F4py)3(μ3-triphosphane)] [triphosphane = 1,1,1-tris(diphenylphosphanylmethyl)ethane (triphos) (17), 1,3,5-tris(diphenylphosphanyl)benzene (triphosph) (18)], and [(AuC6F4py)4(μ4-tetraphosphane)] [tetraphosphane = tetra(diphenylphosphanyl)methane (tetraphos) (19), 1,2,3,5-tetra(diphenylphosphanyl)benzene (tetraphosph) (20)]. Coordination reaction assays of compounds 1, 2, 3, and 4 with [M(diphosphane)(H2O)2](OTf)2 (M = Pd, Pt) were performed in order to test their potential as building blocks in the self-assembly of discrete species. The crystal structures of compounds BrC6F4py, 1, 4, 17, and 19 were determined. Extensive noncovalent interations, particularly fluorine interactions such as C–F···πF, C–F···H, and F···F, have been found to influence the molecular packing of these species.
Es descriu l'experiència de la implantació del Servei d'Accés a Recursos Electrònics en x... more Es descriu l'experiència de la implantació del Servei d'Accés a Recursos Electrònics en xarxa de l'Instituto Cervantes, el desenvolupament i els plantejaments metodològics, com també la transcendència d'aquest projecte en relació amb els usuaris, l'avaluació del Servei fins avui i unes notes amb propostes de millora en el futur més pròxim. Mitjançant una plataforma composta de diferents aplicacions, diversos usuaris
Organic & biomolecular chemistry, Jan 18, 2014
A phosphine-gold(i)-alkynyl-coumarin complex, [Au{7-(prop-2-ine-1-yloxy)-1-benzopyran-2-one}(DAPT... more A phosphine-gold(i)-alkynyl-coumarin complex, [Au{7-(prop-2-ine-1-yloxy)-1-benzopyran-2-one}(DAPTA)] (), was synthesized and the formation of long luminescent fibers in solution was characterized via fluorescence microscopy and dynamic light scattering. The fibers presented strong blue and green luminescence, suggesting that the gold(i) in the complex increased intersystem crossing due to the heavy atom effect, resulting in a significant increase in triplet emission. The X-ray structure of the fibers indicates that both aurophilic, π-π interactions and hydrogen bonding contribute to their formation in aqueous solvents.
Chemistry - A European Journal, 2014
The square-like homo- and heterometallamacrocycles [{Pd(η(3) -2-Me-C3 H4 )(L(n) )2 }2 {M(dppp)}2 ... more The square-like homo- and heterometallamacrocycles [{Pd(η(3) -2-Me-C3 H4 )(L(n) )2 }2 {M(dppp)}2 ](CF3 SO3 )6 (dppp=1,3-bis(diphenylphosphino)propane) and [{Pd(η(3) -2-Me-C3 H4 )(L(1) )2 }2 {M(PPh3 )2 }2 ](CF3 SO3 )6 [py=pyridine, M=Pd, Pt, L(n=) 4-PPh2 py (L(1) ), 4-C6 F4 PPh2 py (L(2) )] containing allyl corners were synthesised by antisymbiotic self-assembly of the different palladium and platinum metallic corners and the ambidentate N,P ligands. All the synthesised assemblies displayed a complex dynamic behaviour in solution, the rate of which is found to be dependent on the electronic and/or steric nature of the different building blocks. A kinetico-mechanistic study by NMR line shape analysis of the dynamics of some of these assemblies was undertaken in order to determine the corresponding thermal activation parameters. Both an enhanced thermodynamic stability and slower dynamics were observed for platinum-pyridine-containing species when compared with their palladium analogues. Time-dependent NMR spectroscopy in combination with ESI mass spectrometry was used to study the exchange between the assemblies and their building blocks, as well as that occurring between different metallamacrocycles. Preliminary studies were carried out on the activity of some of the metallamacrocyclic compounds as catalytic precursors in the allylic substitution reaction, and the results compared with that of the monometallic allylic corner [Pd(η(3) -2-Me-C3 H4 )(L(1) )2 ](+) .
The Journal of Physical Chemistry A, 2012
The supramolecular bonding contacts driving the recognition of chloride ions by macrocyclic imida... more The supramolecular bonding contacts driving the recognition of chloride ions by macrocyclic imidazolium-based receptors have been investigated by density functional theory calculations, both in vacuo and in solution (DMSO). This computational study reveals that the most stable host−guest complexes in vacuo and solution are different. While the anion interacts by means of two C−H···Cl − hydrogen bonds with the host molecule in vacuo (in a similar manner to that observed in the published single-crystal X-ray structure of the Cl−host complex), four C−H···Cl − contacts are clearly present in solution, as observed experimentally by earlier studies. In addition, the computed optimal Cl−host complex in solution confirms that the cavity of the host macrocycle, formed by four aromatic rings, does not includes the anions, which are located outside the cyclic receptor with which they interact through two C Ph −H···Cl − hydrogen bonds and two unconventional (C Im −H) + ···X − interactions.
Organometallics, 2004
The reaction between the rhenium complex [Re (OTf)(L)(CO) 3](L= bipy, t-Bu2bipy) and the alkynyl ... more The reaction between the rhenium complex [Re (OTf)(L)(CO) 3](L= bipy, t-Bu2bipy) and the alkynyl gold compounds (PPh4)[Au (C⋮ Cpy) 2] and (PPh4)[Au (C⋮ C-C6H4-C⋮ Cpy) 2] affords alkynyl rhenium (I) derivatives through a previously unreported transmetalation of ...
Organometallics, 2001
... Bardia, § and Xavier Solans §. ... IR (THF, cm - 1 ): ν(CO) 2048 (m), 1990 (vs), 1965 (sh). 3... more ... Bardia, § and Xavier Solans §. ... IR (THF, cm - 1 ): ν(CO) 2048 (m), 1990 (vs), 1965 (sh). 31 P{ 1 H} NMR (298 K, CH 2 Cl 2 , δ(ppm)): 0.2 (s, PPh 3 ). 1 H NMR (298 K, CD 2 Cl 2 , δ (ppm)): 7.50−7.54 (m, Ph), 3.17 (q, CH 2 , 3 J(H−H) = 7.50 Hz), 1.36 (t, CH 3 , 3 J(H−H) = 6.25 Hz). ...
Organometallics, 2014
ABSTRACT Two series of potentially tridentate ligands of formula ArCH N(CH2)2NMe2 and ArCHN(CH2... more ABSTRACT Two series of potentially tridentate ligands of formula ArCH N(CH2)2NMe2 and ArCHN(CH2)3NMe2 (Ar = C6H5, 2-FC6H4, 4-FC6H4, 2,3,4- F3C6H2) were used to prepare [C,N,N′]-cyclometalated platinum compounds containing either a chloro or a methyl ancillary ligand. The synthesis of the compounds [PtCl{Me2N(CH2)xNCHR}] (3a−h), via the corresponding compounds [PtCl2{Me2N(CH2)xNCHAr}] (2), requires drastic conditions and proceeds more easily for ligands derived from N,N-dimethylpropylenediamine (x = 3). Along the process, an unexpected selective nucleophilic substitution of a fluoro for a methoxy substituent took place at the aryl ring for ligands 2,3,4-F3C6H2CHN(CH2)xNMe2. The syntheses of compounds [PtMe{Me2N(CH2)xNCHR}] (4a−h) using [Pt2Me4(μ-SMe2)2] as a precursor took place for all ligands under relatively mild conditions. All compounds were fully characterized, including molecular structure determination for [PtCl{Me2N(CH2)3NCH(4-FC6H3)}] (3b) and [PtCl{Me2N- (CH2)3NCH(2-OMe,3,4-F2C6H)}] (3g). The absorption and emission spectra were also studied for the [C,N,N′]- cyclometalated platinum(II) compounds, and all of the compounds were emissive in the solid state and in dichloromethane solution at room temperature (compounds 3) or at 77 K (compounds 4). The size of the [N,N′]-chelate ring and the number and position of the substituents in the aryl ring modulate the intensity and the energy of the emission.
Organometallics, 2012
A series of heterometallic metallamacrocycles have been constructed from self-assembly reactions ... more A series of heterometallic metallamacrocycles have been constructed from self-assembly reactions between the fluorinated Au (I) organometallic compounds [(AuC6F4py) 2 (μ2-diphosphane)][diphosphane= bis (diphenylphosphanyl) methane (dppm)(1), 1, 2-bis ( ...
New Journal of Chemistry, 2006
Page 1. Metallodendrimers containing both ruthenium (internal layer) and rhenium (external layer)... more Page 1. Metallodendrimers containing both ruthenium (internal layer) and rhenium (external layer)w Inma Angurell,a Joao C. Lima,b Lara-Isabel Rodrı´guez,a Laura Rodrı´guez,a Oriol Rossell*a and Miquel Secoa Received ...
Journal of Organometallic Chemistry, 2009
The use of dimeric [RhCl(CO) 2 ] 2 as acceptor unit in the construction of mono-, bi-and three-di... more The use of dimeric [RhCl(CO) 2 ] 2 as acceptor unit in the construction of mono-, bi-and three-dimensional metallosupramolecular structures is reported.
Journal of Organometallic Chemistry, 2003
The diaza ligand 1,4-bis(4-pyridyl)butadiyne (L) has been used as a linker in self-assembly react... more The diaza ligand 1,4-bis(4-pyridyl)butadiyne (L) has been used as a linker in self-assembly reactions with different diphosphine Pd(II) and Pt(II) triflates to build metallosupramolecular squares and triangles. Equilibria between triangular and square entities have been detected in most of the cases and their composition studied by multinuclear NMR spectroscopy and mass spectrometry. The self-assembly process has been shown to be
![Research paper thumbnail of Synthesis of palladium and platinum donor complexes and study of their participation in self-assembly reactions. X-ray crystal structure of [Pt(C6H4CCC5H4N)2(dppp)] (dppp=1,3-bis(diphenylphosphino)propane)](https://attachments.academia-assets.com/44377129/thumbnails/1.jpg)
](Journal of Organometallic Chemistry, 2005
Novel square-planar compounds [M(NC 5 H 4 C"CH) 2 (dppp)](OTf) 2 (M = Pd (1), Pt (2)), [Pt(C"CC 6... more Novel square-planar compounds [M(NC 5 H 4 C"CH) 2 (dppp)](OTf) 2 (M = Pd (1), Pt (2)), [Pt(C"CC 6 H 4 CN) 2 (dppp)] (3) and [Pt(C 6 H 4 C"CC 5 H 4 N) 2 (dppp)] (4) (dppp = 1,3-bis(diphenylphosphino)propane) were prepared and characterised. Their potential as building blocks in the generation of heterobimetallic squares was studied. The reaction of 4 and the ditopic acceptor species [Pd(H 2 O) 2 (dppf)](OTf) 2 enabled a tetrametallic metallocycle containing two platinum and two palladium atoms to be obtained. The crystal X-ray structure of 4 shows that the PtÁ Á ÁN vectors are nearly perpendicular, and confirm the suitability of the compound to act as a corner unit for the construction of molecular squares.
Journal of Organometallic Chemistry, 2013
ABSTRACT The synthesis of three azoderivatives {R1eN]NeR2 with R1 ¼ 2-phenylindole and R2 ¼ 4-Mee... more ABSTRACT The synthesis of three azoderivatives {R1eN]NeR2 with R1 ¼ 2-phenylindole and R2 ¼ 4-MeeC6H4e (2a), 4-CleC6H4e (2b) or 2-phenylindole (2c)} and the study of their reactivity in front of Pd(II) salts are described. Treatment of 2a or 2b with PdCl2 in a CH2Cl2:CH3OH mixture at 298 K followed by the action of PPh3 produced the cyclopalladated complexes: [Pd(k2-C,N)Cl(PPh3)] (3a and 3b) with a s{Pd eC(indole)} bond. For 2c, metallation takes place on the same position but required stronger reaction conditions {Pd(OAc)2 in acetic acid at 398 K}. A comparative study of the spectroscopic and photo-optical properties of ligands 2ae2c and their palladium(II) derivatives (3ae3c) is also reported. Addition of PPh3 to CH2Cl2 solutions of compounds 3ae3c produced the opening of the six-membered metallacycle and the formation of the trans-[Pd(k1-N)Cl(PPh3)2] derivatives (4ae4c). The crystal structures of 3c$CH2Cl2, 4a, 4b and 4c$3/2CH2Cl2$1/2H2O confirm the mode of binding and the anti-(E) configuration of 2ae2c in the complexes as well as the relative disposition of the remaining ligands bound to the Pd(II) atom. Solution studies reveal that in CDCl3, the PdeN bond of 4ae4c is hemilabile. Computational studies (at DFT or PM6 level) have also been performed in order to rationalize the high degree of regioselectivity of the cyclopalladation process and the solution behaviour of 4ae4c.
Sound quality techniques are currently becoming more important, as they take into account the hum... more Sound quality techniques are currently becoming more important, as they take into account the human perception of sound. By now, there is no well established international standards for measuring sound quality and no well recognizable reference index for its assessment. Then ...
a química és la ciència que estudia les transformacions de la matèria i la vida és la seva manife... more a química és la ciència que estudia les transformacions de la matèria i la vida és la seva manifestació més important. És una ciència de transferències, un centre de comunicació, un pas entre allò que és senzill i el que és complex, entre les lleis de la física i les de la vida.
Dalton Trans., 2015
Mono-and dinuclear Cu(II) complexes were prepared with pseudopeptidic open chain and macrocyclic ... more Mono-and dinuclear Cu(II) complexes were prepared with pseudopeptidic open chain and macrocyclic ligands, respectively. They were characterized by UV-vis spectroscopy, EPR, HRMS and X-ray diffraction.
Inorganica Chimica Acta, 2015
Four Zn-salophen complexes that differ for the electrodonating/electrowithdrawing character of th... more Four Zn-salophen complexes that differ for the electrodonating/electrowithdrawing character of the substituents located in the positions para to the phenolic oxygens have been used for the molecular recognition of several anions. Spectrophotometric and spectrofluorimetric titrations carried out in ethanol show for three of them strong binding affinity and also marked selectivity in the recognition of ATP 4À , when methoxy electrodonating substituents are present. The finding that a Zn-salophen derivative with overall electrodonating (ÀI < +R) substituents is a more selective receptor for this anion than those decorated with electron withdrawing groups, support the occurrence in this case of supramolecular p-p stacking interactions between the adenosine residue and the aromatic ligand surface that counterbalance the decrease in electrophilicity of the metal center.
Organometallics, 2011
ABSTRACT New neutral and anionic fluoroaryl gold(I) complexes featuring terminal pyridine rings w... more ABSTRACT New neutral and anionic fluoroaryl gold(I) complexes featuring terminal pyridine rings were prepared following different strategies. The homoleptic anionic compounds NBu4[Au(C5F4N)2] (1) and NBu4[Au(C6F4py)2] (2) were obtained by reacting [AuCl(tht)] (tht = tetrahydrothiophene) with the organolithium derivatives of BrC5F4N and BrC6F4py, respectively. This route required the previous synthesis of the new fluorinated compound BrC6F4py, which was produced by a Stille cross-coupling between (4-pyridyl)trimethylstannane and 1,4-dibromotetrafluorobenzene. The neutral phosphane compounds [Au(C6F4N)(PPh3)] (3) and [Au(C6F4py)(PPh3)] (4) were obtained by treatment of [AuCl(PPh3)] with the organolithium reagents LiC6F4N and LiC6F4py, respectively. However, this synthetic strategy failed for organogold compounds containing a polyphosphane ligand. Consequently, an alternative synthetic procedure, based on displacement reactions of the weakly coordinated tht ligand from [Au(C6F4py)(tht)] by the appropriate polyphosphane, was undertaken. Thus, the following complexes were isolated and characterized: [(AuC6F4py)2(μ2-diphosphane)] [diphosphane = bis(diphenylphosphanyl)methane (dppm) (9), 2,2-bis(diphenylphosphanyl)propane (dppip) (10), 1,2-bis(diphenylphosphanyl)ethane (dppe) (11), trans-1,2-bis(diphenylphosphanyl)ethylene (dppet) (12), 1,2-bis(diphenylphosphanyl)acetylene (dppa) (13), 1,3-bis(diphenylphosphanyl)propane (dppp) (14), 1,4-bis(diphenylphosphanyl)butane (dppb) (15), 4,4′-bis(diphenylphosphanyl)-1,1′-biphenyl (dppdph) (16)], [(AuC6F4py)3(μ3-triphosphane)] [triphosphane = 1,1,1-tris(diphenylphosphanylmethyl)ethane (triphos) (17), 1,3,5-tris(diphenylphosphanyl)benzene (triphosph) (18)], and [(AuC6F4py)4(μ4-tetraphosphane)] [tetraphosphane = tetra(diphenylphosphanyl)methane (tetraphos) (19), 1,2,3,5-tetra(diphenylphosphanyl)benzene (tetraphosph) (20)]. Coordination reaction assays of compounds 1, 2, 3, and 4 with [M(diphosphane)(H2O)2](OTf)2 (M = Pd, Pt) were performed in order to test their potential as building blocks in the self-assembly of discrete species. The crystal structures of compounds BrC6F4py, 1, 4, 17, and 19 were determined. Extensive noncovalent interations, particularly fluorine interactions such as C–F···πF, C–F···H, and F···F, have been found to influence the molecular packing of these species.
Es descriu l'experiència de la implantació del Servei d'Accés a Recursos Electrònics en x... more Es descriu l'experiència de la implantació del Servei d'Accés a Recursos Electrònics en xarxa de l'Instituto Cervantes, el desenvolupament i els plantejaments metodològics, com també la transcendència d'aquest projecte en relació amb els usuaris, l'avaluació del Servei fins avui i unes notes amb propostes de millora en el futur més pròxim. Mitjançant una plataforma composta de diferents aplicacions, diversos usuaris
Organic & biomolecular chemistry, Jan 18, 2014
A phosphine-gold(i)-alkynyl-coumarin complex, [Au{7-(prop-2-ine-1-yloxy)-1-benzopyran-2-one}(DAPT... more A phosphine-gold(i)-alkynyl-coumarin complex, [Au{7-(prop-2-ine-1-yloxy)-1-benzopyran-2-one}(DAPTA)] (), was synthesized and the formation of long luminescent fibers in solution was characterized via fluorescence microscopy and dynamic light scattering. The fibers presented strong blue and green luminescence, suggesting that the gold(i) in the complex increased intersystem crossing due to the heavy atom effect, resulting in a significant increase in triplet emission. The X-ray structure of the fibers indicates that both aurophilic, π-π interactions and hydrogen bonding contribute to their formation in aqueous solvents.
Chemistry - A European Journal, 2014
The square-like homo- and heterometallamacrocycles [{Pd(η(3) -2-Me-C3 H4 )(L(n) )2 }2 {M(dppp)}2 ... more The square-like homo- and heterometallamacrocycles [{Pd(η(3) -2-Me-C3 H4 )(L(n) )2 }2 {M(dppp)}2 ](CF3 SO3 )6 (dppp=1,3-bis(diphenylphosphino)propane) and [{Pd(η(3) -2-Me-C3 H4 )(L(1) )2 }2 {M(PPh3 )2 }2 ](CF3 SO3 )6 [py=pyridine, M=Pd, Pt, L(n=) 4-PPh2 py (L(1) ), 4-C6 F4 PPh2 py (L(2) )] containing allyl corners were synthesised by antisymbiotic self-assembly of the different palladium and platinum metallic corners and the ambidentate N,P ligands. All the synthesised assemblies displayed a complex dynamic behaviour in solution, the rate of which is found to be dependent on the electronic and/or steric nature of the different building blocks. A kinetico-mechanistic study by NMR line shape analysis of the dynamics of some of these assemblies was undertaken in order to determine the corresponding thermal activation parameters. Both an enhanced thermodynamic stability and slower dynamics were observed for platinum-pyridine-containing species when compared with their palladium analogues. Time-dependent NMR spectroscopy in combination with ESI mass spectrometry was used to study the exchange between the assemblies and their building blocks, as well as that occurring between different metallamacrocycles. Preliminary studies were carried out on the activity of some of the metallamacrocyclic compounds as catalytic precursors in the allylic substitution reaction, and the results compared with that of the monometallic allylic corner [Pd(η(3) -2-Me-C3 H4 )(L(1) )2 ](+) .
The Journal of Physical Chemistry A, 2012
The supramolecular bonding contacts driving the recognition of chloride ions by macrocyclic imida... more The supramolecular bonding contacts driving the recognition of chloride ions by macrocyclic imidazolium-based receptors have been investigated by density functional theory calculations, both in vacuo and in solution (DMSO). This computational study reveals that the most stable host−guest complexes in vacuo and solution are different. While the anion interacts by means of two C−H···Cl − hydrogen bonds with the host molecule in vacuo (in a similar manner to that observed in the published single-crystal X-ray structure of the Cl−host complex), four C−H···Cl − contacts are clearly present in solution, as observed experimentally by earlier studies. In addition, the computed optimal Cl−host complex in solution confirms that the cavity of the host macrocycle, formed by four aromatic rings, does not includes the anions, which are located outside the cyclic receptor with which they interact through two C Ph −H···Cl − hydrogen bonds and two unconventional (C Im −H) + ···X − interactions.
Organometallics, 2004
The reaction between the rhenium complex [Re (OTf)(L)(CO) 3](L= bipy, t-Bu2bipy) and the alkynyl ... more The reaction between the rhenium complex [Re (OTf)(L)(CO) 3](L= bipy, t-Bu2bipy) and the alkynyl gold compounds (PPh4)[Au (C⋮ Cpy) 2] and (PPh4)[Au (C⋮ C-C6H4-C⋮ Cpy) 2] affords alkynyl rhenium (I) derivatives through a previously unreported transmetalation of ...
Organometallics, 2001
... Bardia, § and Xavier Solans §. ... IR (THF, cm - 1 ): ν(CO) 2048 (m), 1990 (vs), 1965 (sh). 3... more ... Bardia, § and Xavier Solans §. ... IR (THF, cm - 1 ): ν(CO) 2048 (m), 1990 (vs), 1965 (sh). 31 P{ 1 H} NMR (298 K, CH 2 Cl 2 , δ(ppm)): 0.2 (s, PPh 3 ). 1 H NMR (298 K, CD 2 Cl 2 , δ (ppm)): 7.50−7.54 (m, Ph), 3.17 (q, CH 2 , 3 J(H−H) = 7.50 Hz), 1.36 (t, CH 3 , 3 J(H−H) = 6.25 Hz). ...
Organometallics, 2014
ABSTRACT Two series of potentially tridentate ligands of formula ArCH N(CH2)2NMe2 and ArCHN(CH2... more ABSTRACT Two series of potentially tridentate ligands of formula ArCH N(CH2)2NMe2 and ArCHN(CH2)3NMe2 (Ar = C6H5, 2-FC6H4, 4-FC6H4, 2,3,4- F3C6H2) were used to prepare [C,N,N′]-cyclometalated platinum compounds containing either a chloro or a methyl ancillary ligand. The synthesis of the compounds [PtCl{Me2N(CH2)xNCHR}] (3a−h), via the corresponding compounds [PtCl2{Me2N(CH2)xNCHAr}] (2), requires drastic conditions and proceeds more easily for ligands derived from N,N-dimethylpropylenediamine (x = 3). Along the process, an unexpected selective nucleophilic substitution of a fluoro for a methoxy substituent took place at the aryl ring for ligands 2,3,4-F3C6H2CHN(CH2)xNMe2. The syntheses of compounds [PtMe{Me2N(CH2)xNCHR}] (4a−h) using [Pt2Me4(μ-SMe2)2] as a precursor took place for all ligands under relatively mild conditions. All compounds were fully characterized, including molecular structure determination for [PtCl{Me2N(CH2)3NCH(4-FC6H3)}] (3b) and [PtCl{Me2N- (CH2)3NCH(2-OMe,3,4-F2C6H)}] (3g). The absorption and emission spectra were also studied for the [C,N,N′]- cyclometalated platinum(II) compounds, and all of the compounds were emissive in the solid state and in dichloromethane solution at room temperature (compounds 3) or at 77 K (compounds 4). The size of the [N,N′]-chelate ring and the number and position of the substituents in the aryl ring modulate the intensity and the energy of the emission.
Organometallics, 2012
A series of heterometallic metallamacrocycles have been constructed from self-assembly reactions ... more A series of heterometallic metallamacrocycles have been constructed from self-assembly reactions between the fluorinated Au (I) organometallic compounds [(AuC6F4py) 2 (μ2-diphosphane)][diphosphane= bis (diphenylphosphanyl) methane (dppm)(1), 1, 2-bis ( ...
New Journal of Chemistry, 2006
Page 1. Metallodendrimers containing both ruthenium (internal layer) and rhenium (external layer)... more Page 1. Metallodendrimers containing both ruthenium (internal layer) and rhenium (external layer)w Inma Angurell,a Joao C. Lima,b Lara-Isabel Rodrı´guez,a Laura Rodrı´guez,a Oriol Rossell*a and Miquel Secoa Received ...
Journal of Organometallic Chemistry, 2009
The use of dimeric [RhCl(CO) 2 ] 2 as acceptor unit in the construction of mono-, bi-and three-di... more The use of dimeric [RhCl(CO) 2 ] 2 as acceptor unit in the construction of mono-, bi-and three-dimensional metallosupramolecular structures is reported.
Journal of Organometallic Chemistry, 2003
The diaza ligand 1,4-bis(4-pyridyl)butadiyne (L) has been used as a linker in self-assembly react... more The diaza ligand 1,4-bis(4-pyridyl)butadiyne (L) has been used as a linker in self-assembly reactions with different diphosphine Pd(II) and Pt(II) triflates to build metallosupramolecular squares and triangles. Equilibria between triangular and square entities have been detected in most of the cases and their composition studied by multinuclear NMR spectroscopy and mass spectrometry. The self-assembly process has been shown to be
Journal of Organometallic Chemistry, 2005
Novel square-planar compounds [M(NC 5 H 4 C"CH) 2 (dppp)](OTf) 2 (M = Pd (1), Pt (2)), [Pt(C"CC 6... more Novel square-planar compounds [M(NC 5 H 4 C"CH) 2 (dppp)](OTf) 2 (M = Pd (1), Pt (2)), [Pt(C"CC 6 H 4 CN) 2 (dppp)] (3) and [Pt(C 6 H 4 C"CC 5 H 4 N) 2 (dppp)] (4) (dppp = 1,3-bis(diphenylphosphino)propane) were prepared and characterised. Their potential as building blocks in the generation of heterobimetallic squares was studied. The reaction of 4 and the ditopic acceptor species [Pd(H 2 O) 2 (dppf)](OTf) 2 enabled a tetrametallic metallocycle containing two platinum and two palladium atoms to be obtained. The crystal X-ray structure of 4 shows that the PtÁ Á ÁN vectors are nearly perpendicular, and confirm the suitability of the compound to act as a corner unit for the construction of molecular squares.
Journal of Organometallic Chemistry, 2013
ABSTRACT The synthesis of three azoderivatives {R1eN]NeR2 with R1 ¼ 2-phenylindole and R2 ¼ 4-Mee... more ABSTRACT The synthesis of three azoderivatives {R1eN]NeR2 with R1 ¼ 2-phenylindole and R2 ¼ 4-MeeC6H4e (2a), 4-CleC6H4e (2b) or 2-phenylindole (2c)} and the study of their reactivity in front of Pd(II) salts are described. Treatment of 2a or 2b with PdCl2 in a CH2Cl2:CH3OH mixture at 298 K followed by the action of PPh3 produced the cyclopalladated complexes: [Pd(k2-C,N)Cl(PPh3)] (3a and 3b) with a s{Pd eC(indole)} bond. For 2c, metallation takes place on the same position but required stronger reaction conditions {Pd(OAc)2 in acetic acid at 398 K}. A comparative study of the spectroscopic and photo-optical properties of ligands 2ae2c and their palladium(II) derivatives (3ae3c) is also reported. Addition of PPh3 to CH2Cl2 solutions of compounds 3ae3c produced the opening of the six-membered metallacycle and the formation of the trans-[Pd(k1-N)Cl(PPh3)2] derivatives (4ae4c). The crystal structures of 3c$CH2Cl2, 4a, 4b and 4c$3/2CH2Cl2$1/2H2O confirm the mode of binding and the anti-(E) configuration of 2ae2c in the complexes as well as the relative disposition of the remaining ligands bound to the Pd(II) atom. Solution studies reveal that in CDCl3, the PdeN bond of 4ae4c is hemilabile. Computational studies (at DFT or PM6 level) have also been performed in order to rationalize the high degree of regioselectivity of the cyclopalladation process and the solution behaviour of 4ae4c.