Synthesis, and Solution and Solid‐State Structures of (η 3 ‐Allyl){(4 S )‐4‐benzyl‐2‐[2′‐(diphenylphosphino)phenyl]‐ 4,5‐dihydrooxazole‐ P,N }palladium(II) Hexafluorophosphates. Comparison with Dichloro{(4 S )‐2‐[2′‐(diphenylphosphino)phenyl]‐4,5‐dihydro‐4‐phenyloxazole‐ P,N }zinc(II)

Crystal and solution structures of the [Pd II (η 3 ‐allyl)] and of the [Pd II (η 3 ‐1,3‐diphenylallyl)] complexes, 4 and 5 , respectively, with (4 S )‐4‐benzyl‐2‐[2′‐(diphenylphosphino)phenyl]‐4,5‐dihydrooxazole ( 3 ) were determined by X‐ray crystallography and 2D‐NMR spectroscopy. Complex 4 proved to be disordered with both diastereoisomeric complexes in the crystal. The results of X‐ray and NMR experiments demonstrate a good agreement between solution and solid‐state equilibria of the two isomers. A comparison with dichloro{(4 S )‐2‐[2′‐(diphenylphosphino)phenyl]‐4,5‐dihydro‐4‐phenyloxazole‐ P,N }zinc(II) ( 2b ) shows a surprising conformational stability of the coordinated phosphinooxazole ligand 3 .