Eric Paumard

Unusual, linear regioselective hydroformylation on PtL2Cl2-iron or tin catalysts

Abstract PtL2Cl2-iron or tin catalysts (L2 = diphenylphosphinobutane, DIOP…) are found to be highly selective into linear aldehydes during olefin hydroformylation, with up to 90% into hydrocinnamaldehyde and 98% into n heptanal from styrene and 1-hexene, respectively.

Electrochemical synthesis of dimeric platinum hydride species responsible for highly regioselective alkene hydroformylation

PtL2Cl2 complexes (1)[L2= diop, 2,3-O-isopropylidene-2,3-dihydroxy-1,4-bis(diphenylphosphino)butane] have been used as catalyst precursors for alkene hydroformylation after electroreduction using a soluble tin or iron anode, followed by treatment with carbon monoxide–hydrogen; the remarkable regioselectivities for linear aldehyde formation (ca. 98% from hex-1-ene and 90% from styrene) are explained by the production of chelated, bridged platinum hydride cationic species [L2Pt(H)(µ-L2)Pt(H)L2]2+, stabilized by the presence of a polar, highly dissociating solvent.