Palladium-Allyl Phosphoramidite Complexes:  Solid-State Structures and Solution Dynamics

Several mono-phosphoramidite and bis-phosphoramidite 2-methallyl and 1,3-diphenylallyl allyl complexes of Pd(II) have been prepared. The solid-state structure for one of these has been determined. The mono-phosphoramidite chloro-allyl complexes of Pd(II) exist in two isomeric forms in solution. 1H,1...

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Bibliographic Details
Published in:Organometallics 2006-12, Vol.25 (25), p.5955-5964
Main Authors: Filipuzzi, Serena, Pregosin, Paul S, Albinati, Alberto, Rizzato, Silvia
Format: Article
Language:English
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Summary:Several mono-phosphoramidite and bis-phosphoramidite 2-methallyl and 1,3-diphenylallyl allyl complexes of Pd(II) have been prepared. The solid-state structure for one of these has been determined. The mono-phosphoramidite chloro-allyl complexes of Pd(II) exist in two isomeric forms in solution. 1H,1H NMR exchange spectroscopy reveals that the dinuclear species [Pd(μ-Cl)(η3-CH2C(Me)CH2)]2 is involved in the interconversion between the two isomers. There is evidence to suggest that phosphoramidite dissociation is not responsible for this exchange. The cationic η3-2-methallyl bis-phosphoramidite Pd complexes reveal nonequ iv alent 31P resonances, as a consequence of slow allyl dynamics and in agreement with the preliminary X-ray structure.
ISSN:0276-7333
1520-6041
DOI:10.1021/om060726p