Matias, InêsDa Costa Ribeiro, Ana PaulaAlegria, ElisabetePombeiro, ArmandoMartins, Luisa2019-05-032019-05-032019-04-01MATIAS, Inês A. S.; [et al] – C-scorpionate iron(II) complexes as highly selective catalysts for the hydrocarboxylation of cyclohexane. Inorganica Chimica Acta. ISSN 0020-1693. Vol. 489 (2019), pp. 269-2740020-16931873-3255http://hdl.handle.net/10400.21/9923The C-scorpionate iron(II) complexes [FeCl2{kappa(3)-HC(pz)(3)}](1) (pz = pyrazol-1-yl), Li[FeCl2{kappa(3)-SO3C(pz)(3)}] (2) and the new [FeCl2{kappa(3)-HOCH2C(pz)(3)}] (3) act as catalysts for the hydrocarboxylation of cyclohexane (with CO and H2O) to cyclohexanecarboxylic acid in a remarkable yield (up to 60%) and under mild conditions. The catalysts selectivity for the acid can be tuned by CO pressure, catalyst amount and reaction temperature. Complex [FeCl2{kappa(3)-HC(pz)(3)}] (1) provides the most effective catalyst requiring low CO pressure. This work constitutes an unprecedented use of iron complexes as catalysts for the hydrocarboxylation of alkanes.engHydrocarboxylationIronScorpionateHomogeneous catalysisAqueous mediumCyclohexaneCarboxylic acidjournal article10.1016/j.ica.2019.02.035