Complejos NHC de paladio heterogeneizados y sus usos como catalizadores recuperables

The invention relates to a method for producing novel palladium N-heterocyclic carbene complexes (CPs) which, once formed, can be heterogenised on magnetic particles, providing magnetic particles comprising the supported complexes (PMCs) with unique species of palladium, which are clearly defined and firmly fixed to the support. The PMCs are characterised in that they give rise to stable dispersions in aqueous media, are active in catalytic processes of carbon-carbon coupling in said media under mild conditions, the superparamagnetism of the nucleus of the particles allows the separation thereof from the products by applying a magnetic field, they are recovered without degradation, can be reused reaching very high TON values and do not suffer from metal leaching, or only insignificantly, resulting in products of catalysis with palladium contents of less than 10 ppm in mass (up to levels of a certain number of ppb) following the magnetic separation of the particles.