Sample records for COMPLEJOS DE CLORO (chlorine complexes)
from WorldWideScience.org

Sample records 1 - 10 shown.



1

CARACTERIZACION ESPECTROSCOPICA Y ANALISIS TERMICO DE LOS COMPLEJOS TRIFENILFOSFINA-RUTENIO(II) CONTENIENDO EL LIGANDO 2,6-DIMETILPIRAZINA Y OTROS N-HETEROCICLICOS

BOLAÑOS, ALBERTO; CUENÚ, FERNANDO; VARGAS, RUBÉN
2002-12-01

Resumen en español Los complejos sintetizados [RuCl2(2,6-dmpz)2(PPh3)2] y [RuCl2(CO)(N-het)(PPh3)2], (donde N-het son 2,6-dimetilpirazina (2,6-dmpz), Imidazol (Imz) y pirazina (pz)) PPh3 = trifenilfosfina, se sintetizaron a partir de RuCl2(PPh3)3 y un ligando N-heterocíclico. Estos complejos se caracterizaron por técnicas espectroscópicas. Para el complejo [RuCl2(2,6-dmpz)2(PPh3)2] el espectro Ir indica que los cloros se encuentran en posición cis. El espectro electrónico de los comple (mas) jos presenta intensas bandas de transferencia de carga, asignadas a las transiciones de los orbitales dp llenos del rutenio a los orbitales pp * vacíos de los anillos N-heterocíclicos. Los estudios térmicos de DSC y TGA para los complejos del tipo diclorocarbonil(N-heterocíclico)bis(trifenilfosfina)rutenio(II), donde los N-heterocíclicos son 2,6-dmpz, Imz y pz, indican que la estabilidad térmica de los complejos depende de la nucleofílidad del ligando nitrogenado Resumen en inglés The complexes [RuCl2(2,6-dmpz)2(PPh3)2] and [RuCl2(CO)(PPh3)2(N-het)] (N-het is imidazol (Imz) 2,6-dimethylpyrazine (2,6-dmpz) and pyrazine (pz)) PPh3 = triphenilphosfine), were synthized from RuCl2(PPh3)3 and a N-heterocyclic ligand. The complexes were characterized by spectroscopic techniques. The vibrational spectrum of [RuCl2(2,6-dmpz)2(PPh3)2] indicat that chlorine atoms are in cis position. The spectrum is from 31P-NMR indicated that phosphines are in position trans (mas) . The electronic spectra of these complexes exhibited intense bands of charge transfer assigned to the transitions of the occupied dp orbitals of ruthenium to the empty ppi * orbitals of the N-heterocyclic rings. The curve of DSC (Differential Scanning Calorimetryc) indicates that the complexe dichlorobis(2,6-dimethyilpirazine)bis(triphenylphosphine)ruthenium(II) suffers an exothermic phase transition at 231 0C. From the TGA the exothermic phase transition is due to a loss of mass that is characterized as to tha dissociation of one of 2,6-dmpz and a PPh3. The thermal studies of the complexes of the type RuCl2(CO)(PPh3)2(N-het), where N-het is a 2,6-dmpz, Imz and pz, by DSC and TGA indicate that thermal stability of ths complexes depend on the nucleophilicity of the nitrogen ring

Scientific Electronic Library Online (Spanish)

2

Tetranuclear (Phosphane)(thiolato)gold(I) Complexes: Synthesis, Characterization and Photoluminiscent Properties.

Fernández, Eduardo J.; Laguna, Antonio; López-de-Luzuriaga, José M.; Monge, Miguel; Montiel, Manuel; Olmos, M. Elena; Puelles, Raquel C.; Sánchez-Forcada, Eva
2007-07-12

Digital.CSIC (Spain)

3

Some kinetics aspects of chlorine-solids reactions

Kanari, N.; Mishra, D.; Mochón Muñoz, J.; Verdeja González, L. Felipe; Diot, F.; Allain, E.
2010-02-28

Digital.CSIC (Spain)

5

Preparation and characterization of novel os−diolefin dimers: New entry to os−cyclooctadiene complexes

Esteruelas, Miguel A.; García-Yebra, Cristina; Oliván, Montserrat; Oñate, Enrique
2006-11-01

Digital.CSIC (Spain)

6

Hexanol-Induced Order-Disorder Transitions in Lamellar Self-Assembling Aggregates of Bacteriochlorophyll c in Chlorobium tepidum Chlorosomes

Arellano, Juan B.; Torkkeli, Mika; Tuma, Roman; Laurinmäki, Pasi A.; Melo, Thor Bernt; Ikonen, Teemu P.; Butcher, Sarah J.; Serimaa, Ritva E.; Psencik, Jakub
2008-03-01

Digital.CSIC (Spain)

7

Evidence for a specific pattern of polychlorinated dibenzo-p-dioxins and dibenzofurans in bivalves

Abad Holgado, Esteban; Pérez, Francisca; Llerena, José J.; Caixach Gamisans, Josep
2003-10-18

Digital.CSIC (Spain)

8

Evaluation of organochlorine compounds (PCDDs, PCDFs, PCBs and DDTs) in two raptor species inhabiting a Mediterranean island in Spain

Jiménez, Begoña; Merino, Rubén; Abad Holgado, Esteban; Rivera Aranda, Josep; Olie, Kees
2007-05-01

Digital.CSIC (Spain)

9

Chemometric modeling and prediction of trihalomethane formation in Barcelona’s water works plant

Platikanov, Stefan; Puig, Xavier; Martín, Jordi; Tauler Ferré, Romà
2007-08-01

Digital.CSIC (Spain)

10

Characterization by epr spectroscopy of the chiral catalysts bis(oxazoline)-Cu supported in laponites

Alonso Gascón, Pablo J.; Martínez Martínez, Jesús I.; García, José I.; Fraile, José M.; Mayoral, José A.; Sánchez, María Concepción; García, Joaquín
2000-08-01

Digital.CSIC (Spain)