Synthesis and electrochemical characterization of bimetallic ruthenium complexes with the bridging h2(s,s)-1,3-butadiyne-1,4-diyl ligand



Document title: Synthesis and electrochemical characterization of bimetallic ruthenium complexes with the bridging h2(s,s)-1,3-butadiyne-1,4-diyl ligand
Journal: Journal of the Brazilian Chemical Society
Database: PERIÓDICA
System number: 000310904
ISSN: 0103-5053
Authors: 1

Institutions: 1Universidade Estadual de Campinas, Instituto de Quimica, Campinas, Sao Paulo. Brasil
Year:
Season: Jun
Volumen: 11
Number: 3
Pages: 252-256
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, aplicado
English abstract The bis(ruthenium)alkyne complex [cis-{RuCl (bpy)2(m-CºC-)}]2 (1) was obtained by treatment of 1 equiv of either 1,4-bis(trimethylsilyl)-1,3-butadiyne or bis(trimetylsilyl)acetylene with 2 equiv of cis-[RuCl2(bpy)2].2H2O, NaF and NaBF4 salts in methanol/CH2Cl2 mixture (10/1) in 52% and 35% yields, respectively. 1H, 13C{H} NMR and principally electrochemical analyses confirmed that the same product was obtained from the two reactions. Cyclic voltammetric analyses of (1) from 0 to 1.20 V displays two one-electron quasi-reversible oxidation peaks attributed to the Ru(II)/Ru(III) couple. The redox processes are separated by 520 mV, indicating a significant electronic communication between the two metallic centers
Portuguese abstract O complexo [cis-{RuCl(bpy)2(m-CºC-)}] 2 (1) foi obtido pelo tratamento de 1 equive de 1,4-bis(trimetilsilil)-1,3-butadiino ou bis(trimetilsilil)acetileno com 2 equiv do complexo cis-[RuCl2(bpy)2].2H2O, NaF e NaBF4 na mistura de solventes metanol/CH2Cl2 (10/1) com rendimentos de 52% e 35%, respectivamente. Análises de RMN de 1H, 13C{H} e principalmente eletroquímica, confirmaram que o mesmo produto foi obtido dos dois métodos. Análise de (1) através de voltametria cíclica, no intervalo de potencial de 0 a 1,20 V mostrou dois picos de oxidação quasi-reversíveis referentes ao par redox Ru(II)/Ru(III). Os dois processos redox são separados por 520 V, indicando comunicação eletrônica significante entre os dois centros metálicos
Disciplines: Química
Keyword: Química organometálica,
Electroquímica,
Complejos bimetálicos,
Complejos de rutenio
Keyword: Chemistry,
Organometallic chemistry,
Electrochemistry,
Bimetallic complexes,
Ruthenium complexes
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