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Communication | Special issue | Vol 80, No. 2, 2010, pp.933-939
Published online, 1st February, 2010
DOI: 10.3987/COM-09-S(S)134
Helical Chirality Control of Tropos Sandwich-Shaped L2M3 Complexes with C3-Symmetric Tris(diphenylphosphinophenyl)benzene Ligand

Kazuki Wakabayashi and Koichi Mikami*

*Department of Applied Chemistry, Graduate School of Science and Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan


The L2M3 complexes with tropos C3-symmetric ligands interconvert rapidly between the chiral propeller (P)- and (M)-helicity of the sandwich-shaped L2M3 complexes at room temperature and are chirally controlled to adopt a single helical structure upon complexation with a chiral diamine. The L2M3 complexes chirally controlled can be employed for asymmetric transfer hydrogenation.