Two new nanocatalysts were prepared by stabilization Pd(cdha) 2 and Pd(dba) on the surface of Fe 3 O 4 @SiO 2 /APTMS support. For this purpose Fe 3 O 4 nanoparticles covered with SiO 2. This compound was modified with (3-aminopropyl) trimethoxysilane (APTMS) and fully characterized by FT-IR spectroscopy. In the next stage, 2-chloro 3,4-Dihydroxyacetophenone and dibenzylideneacetone were loaded on the amino functionalized support. Finally, the catalysts were prepared by adding palladium chloride and identified with XRD and FT-IR spectra and TEM and SEM images. In the next section, the Hiyama cross-coupling reaction (fluoride free) was studied. This reaction can be performed at a short time and in a green solvent. The results showed that Hiyama cross-coupling reactio in the presence of this heterogeneou nanocatalysts have good results . This occurs due to the type of ligands, activators and the steric hindrance of the catalyst.
