Ausschließlich trans‐Koordination wird mit SPANphos erreicht, einem C2‐symmetrischen Spiro‐Diphosphan‐Liganden, der in nur drei Stufen aus Standardreagentien zugänglich ist. Der große intramolekulare P‐P‐Abstand, der cis‐Koordination ausschließt, wird in den Strukturen des Liganden und des Komplexes [PtCl2(SPANphos)] im Kristall deutlich.
Exclusively trans coordination is exhibited by SPANphos, a C2‐symmetric diphosphane ligand containing a spiro center, which can be easily synthesized in three steps from cheap reagents. The crystal structures of the ligand and of the complex [PtCl2(SPANphos)] show large P⋅⋅⋅P distances, and reflect the C2 symmetry of the ligand.
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