Browsing by Author "Bruno, S. M."
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- Isomerization of alfa-pinene oxide in the presence of indenyl allyl dicarbonyl molybdenum(II) and tungsten(II) complexesPublication . Bruno, S. M.; Gamelas ou Carla A. Gamelas, Carla; Gomes, A. C.; Valente, A.; Pillinger, M.; Romão, C.; Gonçalves, I.The indenyl complexes IndM(η3-C3H5)(CO)2 (M=Mo (1), W (2)), (IndMe)Mo(η3-C3H5)(CO)2 (3) and (IndSiMe3)Mo(η3-C3H5)(CO)2 (4) display catalytic activity for the isomerisation of α-pinene oxide. Conversion reached 97% after 3 h at 35 °C in the presence of 1 and 1,2-dichloroethane as solvent, giving campholenic aldehyde in 56% yield. Solvent polarity and basicity appear to affect the reaction rate. Whereas the type of substituent on the indenyl ligand does not appear to have a strong impact on catalytic performance, changing the metal centre from Mo (1) toW(2) gave a significantly more active catalyst.