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1. Compuestos organometálicos <strong>de</strong> rutenio.<br />

Síntesis, reactividad y aplicaciones<br />

Palabras clave: rutenio, truxeno, alenili<strong>de</strong>no<br />

Se han optimizado las condiciones <strong>de</strong> síntesis <strong>de</strong> los<br />

alenili<strong>de</strong>nocomplejos <strong>de</strong> Ru a partir <strong>de</strong> los alquiiniloles<br />

sin-5, 10, 15-trietinil-5, 10, 15-trihidroxitruxeno y<br />

sin-5, 10-dietinil-5, 10-dihidroxitruxen-15-ona<br />

y [RuCl(PPh 3<br />

) 2<br />

(ç 5 -ind)] (ind = in<strong>de</strong>nilo). A<strong>de</strong>más se ha<br />

estudiado la formación <strong>de</strong> alenili<strong>de</strong>nos <strong>de</strong> los mismos<br />

alquiniloles con [RuCl(dppe) 2<br />

]PF 6<br />

. Según el disolvente<br />

usado, temperatura y tiempo <strong>de</strong> reacción, se forman<br />

especies cis- o trans-alenili<strong>de</strong>no o vinili<strong>de</strong>nos intermedios,<br />

<strong>de</strong> modo que ha sido preciso optimizar las condiciones<br />

<strong>de</strong> reacción para aislar especies puras. El estar<br />

unidos dos o tres centros metálicos a través <strong>de</strong> un sistema<br />

electrónico extenso (truxeno/truxen-15-ona y carbonos<br />

=C=C= adicionales) rebaja la frecuencia IR<br />

(=C=C=C=) a 1894 cm -1 para los in<strong>de</strong>nilcomplejos y a<br />

1864 cm -1 para los (dppe)complejos con relación a la<br />

que presentan los alenili<strong>de</strong>nos monometálicos (1925<br />

cm -1 ).Esto hace también que los potenciales <strong>de</strong> reducción<br />

sean notablemente más bajos. su fuerte color azulvioleta<br />

se <strong>de</strong>be a las intensas absorciones CT <strong>de</strong> sus<br />

espectros electrónicos.<br />

1. Ruthenium organometallic compounds.<br />

Synthesis, reactivity and applications<br />

Keywords: ruthenium, truxene, allenyli<strong>de</strong>ne<br />

The conditions of synthesis of ruthenium allenyli<strong>de</strong>ne<br />

complexes from the alkynylols syn-5, 10, 15- triethynyl-<br />

5, 10, 15-trihydroxytruxene and syn-5, 10-diethynyl-5,<br />

10-dihydroxytruxen-15-one and [RuCl(PPh 3<br />

) 2<br />

(ç 5 -ind)]<br />

(ind = in<strong>de</strong>nyl) have been optimized. In<strong>de</strong>ed the formation<br />

of ruthenium allenyli<strong>de</strong>ne complexes from the<br />

same alkynylols and [RuCl(dppe) 2<br />

]PF 6<br />

was explored.<br />

Depending on the solvent, temperature and reaction<br />

time, cis- or trans-allenyli<strong>de</strong>ne species or vinyli<strong>de</strong>ne<br />

intermediates are formed, and an optimization of the<br />

reaction conditions was necessary to isolate pure species.<br />

Since these new allenyli<strong>de</strong>ne complexes contain<br />

two/three ruthenium centers bon<strong>de</strong>d through an exten<strong>de</strong>d<br />

electron system (truxene/truxen-15-one and additional<br />

=C=C= carbons) the (=C=C=C=) IR frequencies<br />

shift to lower values (1894 cm -1 for the in<strong>de</strong>nylcomplexes<br />

and 1864 cm -1 for the (dppe)complexes) with respect<br />

to those of monometallic allenyli<strong>de</strong>nes (1925 cm -<br />

1).The same occurs with the reduction potentials, which<br />

are consi<strong>de</strong>rably low for these new allenyli<strong>de</strong>nes. their<br />

intense indigo blue-violet color is due to the presence<br />

of strong absorptions assigned to CT transitions in the<br />

Proyectos: PGC.PB 97-0002-C02-02 y BQU2001-0193-C02-02<br />

2. Estudio estructural <strong>de</strong> cristales moleculares<br />

Palabras clave: interacciones intermoleculares, modos<br />

<strong>de</strong> coordinación, isomería <strong>de</strong> inversión <strong>de</strong> anillo<br />

Se ha estudiado la estructura molecular, asociación y<br />

apilamiento intermolecular <strong>de</strong> nuevos truxenos alquilados.<br />

Se han encontrado nuevos modos estructurales <strong>de</strong><br />

coordinación <strong>de</strong> ligandos tri<strong>de</strong>ntados <strong>de</strong>rivados <strong>de</strong><br />

tris(pirazolil)borato en los que este ligando se coordina<br />

como tri<strong>de</strong>ntado( 3 ), bi<strong>de</strong>ntado( 2 ), mono<strong>de</strong>ntado ( 1 ) o<br />

como contra-anión, fuera <strong>de</strong> la esfera <strong>de</strong> coordinación<br />

<strong>de</strong>l metal ( 0 ). Se han <strong>de</strong>terminado las estructuras cristalinas<br />

<strong>de</strong> diversos berilocenos, mostrando evi<strong>de</strong>ncias <strong>de</strong><br />

isómeros 5-1.<br />

2. Structural studies on molecular<br />

crystals<br />

Keywords: stacking interactions, coordination mo<strong>de</strong>s,<br />

ring-inversion isomery<br />

Molecular structures, self-association and stacking<br />

interactions in new truxenos have been studied. New<br />

structural mo<strong>de</strong>s in complexes with tri<strong>de</strong>ntate Tris(pirazolil)borate<br />

<strong>de</strong>rivatitives have been found, in which this<br />

ligand is coordinated as mono<strong>de</strong>nta<strong>de</strong> ( 1 ) or as a nocoordinated<br />

anion ( 0 ) as well. The structure of several<br />

beryllocenes have also been <strong>de</strong>terminated, pointing<br />

showing Evi<strong>de</strong>nce for the existence of 5 - 1 isomers of<br />

beryllocenes.<br />

1. <strong>de</strong> Frutos, O.; Granier, T., Gómez-Lor, B.; Jiménez-Barbero, J.; Monge, A.; Gutiérrez-Puebla, E.; Echevarren A.M.; Chem. Eur. J. 8, 2879-<br />

2890, 2002.<br />

2. Bel<strong>de</strong>rraín T.; Paneque, M.; Cramona, E.; Gutiérrez-Puebla, E.; Monge, A.; Ruíz-Valero, C.; Inorg Chem. 41, 425-428, 2002.<br />

3. Conejo, M.M.; Fernán<strong>de</strong>z, R.; <strong>de</strong>l Río, D.; Cramona, E.; Monge, A.; Ruíz-Valero, C.; Chem Commun. 2916-2917, 2002.<br />

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