Investigations on new reactions using the well-defined catalysts for olefin metathesis and ethylene polymerization have been occurred around the world.^1,2 On the other hand, there is a stimulating challenge in the search for simpler systems, in which an active catalytic species could be readily generated in-situ at low cost. In this direction, we have been developing of alternative Ru/Pd-based catalyst, the novel ruthenium-palladium heterobimetallic complex was synthesized in two steps, [Pd(PPh₃)(DMSIO)] (1) synthesis, which reacted with [RuCl₂(p-cymene)]₂ giving the bimetallic [RuCl₂(p-cymene)-Pd(PPh₃)(DMSIO)] (2). The complex [RuCl₂(p-cymene)(isoniazid)] (3) was synthetized according to the literature² to compare its reactivity with complex 2. The complexes were characterized by FTIR, UV-Vis and ¹H, ¹³C{¹H} and ³¹P{¹H} NMR.

The complexes 2 and 3 were evaluated as catalytic precursors for ROMP of norbornene (NBE) and the complex 3 has been evaluated for ethylene polymerization. The polynorbornene (polyNBE) syntheses via ROMP using the complexes 2 and 3 as pre-catalysts were evaluated under reaction conditions of [EDA]/[Ru] = 28 (5 mL), [NBE]/[Ru] = 3500 for 60 minutes at 50 °C, both the complexes were active and the yields were 12 and 17 % respectively. The polymerization of ethylene mediated by palladium complex precursor 1 was active using MAO (Methylaluminoxane) as initiator with a [MAO]/[Pd] ratio of 700, then the complex 2 will be evaluated in the same conditions.