A carregar...
Projeto de investigação
Sem título
Financiador
Autores
Publicações
Use of organomolybdenum compounds for promoted hydrolysis of phosphoester bonds in aqueous media
Publication . Gamelas ou Carla A. Gamelas, Carla; Gomes, Ana C.; Fernandes, José A.; Paz, Filipe A. Almeida; Nunes, Patrique; Pillinger, Martyn; Gonçalves, Isabel S.; Romão, Carlos C.; Abrantes, Marta
Application of an Indenyl Molybdenum Dicarbonyl Complex in the Isomerisation of α-Pinene Oxide to Campholenic Aldehyde
Publication . Bruno, S.; Gomes, A. C.; Gamelas ou Carla A. Gamelas, Carla; Abrantes, M.; Oliveira, M. C.; Valente, A.; Almeida-Paz, Filipe; Pillinger, M.; Romão, C.; Gonçalves, I.
The complex [{(Z5-Ind)Mo(CO)2(m-Cl)}2] (1) has been tested for the industrially relevant catalytic isomerisation
of a-pinene oxide (PinOx) to campholenic aldehyde (CPA) in the liquid phase. PinOx conversion and CPA
selectivity are strongly influenced by the solvent employed. Complete conversion of PinOx was achieved
within 1 min at 55 1C or 30 min at 35 1C using 1,2-dichloroethane as solvent, giving CPA in 68% yield.
Other products included trans-carveol, iso-pinocamphone and trans-pinocarveol. The stability of 1 under
the reaction conditions used was investigated by using FT-IR spectroscopy and electrospray ionisation
mass spectrometry (ESI-MS) to characterise recovered solids. In the presence of air/moisture 1 undergoes
oxidative decarbonylation upon dissolution to give oxomolybdenum species that are proposed to include
a tetranuclear oxomolybdenum(V) complex. Conversely, ESI-MS studies of 1 dissolved in dry acetonitrile
show mononuclear species of the type [IndMo(CO)2(CH3CN)n]+. The crystal structure of the ring-slipped
dicarbonyl complex [(Z3-Ind)Mo(CO)2Cl(CH3CN)2] (2) (obtained after dissolution of 1 in acetonitrile) is
reported.
Unidades organizacionais
Descrição
Palavras-chave
Contribuidores
Financiadores
Entidade financiadora
Fundação para a Ciência e a Tecnologia
Programa de financiamento
5876-PPCDTI
Número da atribuição
PTDC/QEQ-SUP/1906/2012