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Platinum(II) Complexes with Constructive and Destructive Interaction of Diphosphane and Binaphthol Ligands

✍ Scribed by Nicole M. Brunkan; Peter S. White; Michel R. Gagné

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
176 KB
Volume
37
Category
Article
ISSN
0044-8249

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✦ Synopsis

Eight molecules with different conformations are present in the unit cell of the Pt complex 1, which contains a mismatched arrangement of the chiral ligands Chiraphos and Binol (i.e., (S,S)-Chiraphos prefers the δ conformation, whereas (R)-Binol tends to induce the λ conformation in the diphosphane). The observed flexibility of these bidentate ligands should not be disregarded in stereochemical models for explaining the selectivity in asymmetric catalysis.

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Cyclic voltammetry and spectroelectrochemistry studies are reported for the tetramethyl- tetrapyridinoporphyrazine complexes N,N′,N″,N‴-tetramethyltetra-2,3-pyridinoporphyrazine palladium(II) (1a), N,N′,N″,N‴-tetramethyltetra-3,4-pyridinoporphyrazine palladium(II) (1b), N,N′,N″,N‴-tetramethyltetra-2