Tin has been found to have catalytic effects in many processes. The compounds SnX<sub>4</sub> (X=Cl,Br,I) are very reactive species which hydrolyze/oxidize readily. To stabilize the catalyst, a bis-phosphine ligand can be bound to the SnX<sub>4</sub> species. Several free ligands (bis(diphenylphosphino)phenylenediamine and bis(diphenylphosphino)aminoethyl) and their resin bound analogues were coupled with Sn(IV) species and their ability to catalyze the esterification of oleic acid was tested. Results suggest that the phosphine couples to tin while retaining some catalytic activity.

Stabilization of catalytic tin species with phosphine ligands

249th National Meeting (2015)

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