Synthetic and high field NMR studies of chiral clusters

Over the last few years, the development of logical routes to small organometallic clusters has opened the way towards the directed syntheses of chiral clusters. Tetrahedral systems comprised of four chemically different vertices are chiral. However, under the conditions required for catalytic action, clusters of this type generally racemize. The introduction of a chelating unsymmetrical ligand, such as Ph2PCH2CH2AsPh2, renders chiral a …