Inorganica Chimica Acta p. 269 - 274 (2019)
Update date:2022-08-18
Topics:
Matias, Inês A.S.
Ribeiro, Ana P.C.
Alegria, Elisabete C.B.A.
Pombeiro, Armando J.L.
Martins, Luísa M.D.R.S.
The C-scorpionate iron(II) complexes [FeCl2{κ3-HC(pz)3}] (1) (pz = pyrazol-1-yl), Li[FeCl2{κ3-SO3C(pz)3}] (2) and the new [FeCl2{κ3-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{κ3-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.
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