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Type: Artigo de periódico
Title: Synthesis and electrochemical characterization of bimetallic ruthenium complexes with the bridging eta2(s,s)-1,3-butadiyne-1,4-diyl ligand
Author: Stein, Edison
Oki, Sergio Y.
Vichi, Eduardo J. S.
Abstract: The bis(ruthenium)alkyne complex [cis-{RuCl (bpy)2(mu-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.
O complexo [cis-{RuCl(bpy)2(mi-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 NaBF4na 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
Subject: electrochemistry
ruthenium complex
bimetallic complexes
Editor: Sociedade Brasileira de Química
Rights: aberto
Identifier DOI: 10.1590/S0103-50532000000300009
Date Issue: 1-Jun-2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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