caa a22 4500 445388749 CHVBK 20180317143039.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s11144-010-0257-0 doi (NATIONALLICENCE)springer-10.1007/s11144-010-0257-0 An insight into the beginning stage of the aqueous ring opening metathesis polymerization of exo , exo -7-oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid with RuIII compounds: the consumption of RuIII species in the presence of carboxylic acids monitored by ESR spectroscopy [Elektronische Daten] [Nouga Batista, José Silva Sá, Bruce McGarvey, Douglas Franco, Benedito Lima-Neto] The presence of paramagnetic species in the aqueous ring opening metathesis polymerizations of the exo,exo-7-oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid monomer with RuCl3 and K2[RuCl5H2O] compounds was studied using ESR techniques. It was observed that the intensities of the RuIII signals in the ESR spectra decrease on the time scale of the induction period so that the ROMP can take place. The intensity of the RuIII signal almost disappeared 50 min after reacting with K2[RuCl5H2O] and after 100min in the case of RuCl3. Reactions of the cis-[Ru(NH3)4(H2O)2](tfms)3 and [Ru(NH3)5H2O](tfms)3 complexes with the monomer and different organic compounds representing the organic functions in the monomer (furan, norbornene, but-2-ene-1,4-diol and formic, acetic, oxalic and maleic acids) were also monitored by ESR and UV/vis spectra. It was deduced that the organic acids provide the disappearance of the RuIII signal. The proton NMR relaxation times of the residual water in D2O for reactions with oxalic acid suggested that the presence of paramagnetic ions in the solution decreases along with the disappearance of the ESR signal for RuIII. It was suggested that diamagnetic Ru species were indeed produced in the medium. Akadémiai Kiadó, Budapest, Hungary, 2010 Olefin metathesis nationallicence ROMP nationallicence 7-Oxanorbornene nationallicence Ruthenium nationallicence Organic acids nationallicence Batista Nouga Centro de Ciências da Natureza, Universidade Estadual do Piauí, 64002-150, Teresina, PI, Brazil aut Silva Sá José Instituto de Química de São Carlos, Universidade de São Paulo, C. P. 780, 13560-980, Sao Carlos, SP, Brazil aut McGarvey Bruce Department of Chemistry & Biochemistry, University of Windsor, Windsor, ON, Canada aut Franco Douglas Instituto de Química de São Carlos, Universidade de São Paulo, C. P. 780, 13560-980, Sao Carlos, SP, Brazil aut Lima-Neto Benedito Instituto de Química de São Carlos, Universidade de São Paulo, C. P. 780, 13560-980, Sao Carlos, SP, Brazil aut Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 102/1(2011-02-01), 49-65 1878-5190 102:1<49 2011 102 11144 https://doi.org/10.1007/s11144-010-0257-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11144-010-0257-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Batista Nouga Centro de Ciências da Natureza, Universidade Estadual do Piauí, 64002-150, Teresina, PI, Brazil aut NATIONALLICENCE 700 1- Silva Sá José Instituto de Química de São Carlos, Universidade de São Paulo, C. P. 780, 13560-980, Sao Carlos, SP, Brazil aut NATIONALLICENCE 700 1- McGarvey Bruce Department of Chemistry & Biochemistry, University of Windsor, Windsor, ON, Canada aut NATIONALLICENCE 700 1- Franco Douglas Instituto de Química de São Carlos, Universidade de São Paulo, C. P. 780, 13560-980, Sao Carlos, SP, Brazil aut NATIONALLICENCE 700 1- Lima-Neto Benedito Instituto de Química de São Carlos, Universidade de São Paulo, C. P. 780, 13560-980, Sao Carlos, SP, Brazil aut NATIONALLICENCE 773 0- Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 102/1(2011-02-01), 49-65 1878-5190 102:1<49 2011 102 11144 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer