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Portugaliae Electrochimica Acta
versión impresa ISSN 0872-1904
Port. Electrochim. Acta v.22 n.1 Coimbra 2004
Comparative Electrochemical Behaviour of the Complexes trans-[Mo(NCN){NCNC(O)R}(dppe)2]Cl (R = Et or Ph) and trans-[Mo(NCN)CI(dppe)2][BF4]
Elisabete C.B.A. Alegria,a,b,* Sónia M.P.R.M. Cunha,a Luísa M.D.R.S. Martins,a,b M. Fátima C. Guedes da Silva,a,c Armando J.L. Pombeiroa
aCentro de Química Estrutural, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais,
1049-001 Lisboa, Portugal.
bSecção de Química Inorgânica, DEQ, Instituto Superior de Engenharia de Lisboa, R. Conselheiro Emídio Navarro, 1949-014 Lisboa, Portugal.
cUniversidade Lusófona de Humanidades e Tecnologias, Campo Grande 376, 1749-024, Lisboa, Portugal.
Received 27 October 2003; accepted 25 November 2003
Abstract
The bis(cyanoimide) complex trans-[Mo(NCN)2(dppe)2] (dppe = Ph2PCH2CH2PPh2) is susceptible of electrophilic attack to form the acylated and aroylated derivatives trans-[MO(NCN){NCNC(O)R}(dppe)2]Cl (R = Et 2a or Ph 2b). Herein, we report a preliminary study on the electrochemical behaviour of complexes 2 and the derivative trans-[Mo(NCN)Cl(dppe)2][BF4] 3, as investigated by cyclic voltammetry (CV) and controlled-potential electrolysis (CPE), what has allowed a comparison of the electron-donor ability of the ligands.
Keywords:Molybdenum complexes, cyanoimide complexes, acylation, aroylation, derivative, electrophilic attack, electron richness.
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*Corresponding author. E-mail address: ebastos@deq.isel.ipl.pt