Planar-to-Axial Chirality Relay in Phospharuthenocenes. A Rotationally Hindered 2-(2‘-Diphenylphosphinonaphth-1‘-yl)phospharuthenocene
2007
Competing steric pressures within the coordination sphere of 2-(2‘-X-naphth-1‘-yl)-3,4-dimethyl-5-phenyl-η5-phospholyl(pentamethylcyclopentadienyl)ruthenium(II) complexes (X = OMe (1), OH (3), OTf (4), PPh2(O) (5), PPh2 (6)) give rise to a well-defined and predictable axial chirality about the phospharuthenocene−naphthyl bond. Crystal structure analysis of the platinum complex cis-[Pt(6)Cl2] (7) shows a very different geometry from that found in cis-[Pt(1)(PEt3)Cl2] (2) because of the leverage exerted on the Pt coordination sphere by the (2‘-PPh2-naphth-1‘-yl) functionality.
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