Resumo

MODRONO-ALONSO, María et al. Aqueous-biphasic hydroformylation of 1-hexene catalyzed by the complex HCo(CO)[P(o-C₆H₄SO₃Na)]₃. J. Mex. Chem. Soc [online]. 2017, vol.61, n.2, pp.128-137. ISSN 1870-249X.

The water soluble cobalt complex HCo(CO)[P(o-C6H4SO3Na)]3 was used as catalyst precursor for the biphasic aqueous hydroformylation of 1-hexene. The complex was synthesized by reductive carbonylation of CoCl2.6H2O in the presence of o-TPPTS ([P(o-C6H4SO3Na)]3) under nitrogen atmosphere and characterized by FTIR, 1H NMR and 31P {1H} NMR, 13C NMR, DEPT - 135, COSY, HSQC, MS (ESI). The catalytic activity of the complex in the biphasic hydroformylation reaction of 1-hexene was evaluated under moderate reaction conditions. The pressure and temperature were varied from 4137 - 7584 kPa (600-1100 psi) of syngas and from 353 - 383 K (80 - 110 oC), respectively. The 1-hexene concentration was varied from 0.021-0,11M and the catalyst from 4x10-4 - 1.1x10-3 M. The best conversion at 363 K and 7584 kPa and 7.5 h was 62% with selectivity towards aldehydes (heptanal and 2-methyl-hexanal) of 66% to with l/b ratio of 2.6. The recycling of the catalytic precursor after four successive times, did not show any loss on the activity, having selectivity towards aldehyde up to 60%.

Palavras-chave : Biphasic hydroformylation; Cobalt complexes; 1-hexene; recycling; o-TPPTS.

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