Immobilization of [Rh(NBD)(C5H4CO2(CH2)2OH)] on polystyrene resins

We have recently reported that the reaction between the novel [Rh[C5H4CO2(CH2)2O2C-Im](NBD)] (1), obtained from [Rh[C5H4CO2(CH2)2OH](NBD)] (2) and carbonyldiimidazole, and polypropylenimine dendrimers DAB-dendr-(NH2)n (n = 4, 8, 16, 32, 64) leads to the quantitative formation of the new, completely functionalised, organometallic macromolecules of the type DAB-dendr-[NH(O)COCH2CH2OC(O)C5H4Rh(NBD)]n containing up to 64 peripheral alkoxycarbonylcyclopentadienyl complexes of rhodium(I). Here we report on the extension of this procedure to the direct and quantitative immobilization of [Rh[C5H4CO2(CH2)2O2C-Im](NBD)] (1) on the -NH2 functionalized (aminomethyl)polystyrene resin. The development of an alternative synthetic method toward the grafting of [Rh[C5H4CO2(CH)2OH](NBD)] (2) on an imidazolide carbamates functionalized Wang resin will be also presented and discussed. The new materials have been characterized by means of spectroscopic (IR Microscopy) and analytical Inductively Coupled Plasma – Atomic Emission Spectrometry (ICP-AES) measurements.Studies on the catalytic activity of these supported systems (dendrimers and resins) in the hydroformylation and hydrogenation of 1-hexene and styrene are currently under investigation.