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Organometallics

Article . 1997 . Peer-reviewed

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Organometallics

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The Difficulty of Coordinating MutuallytransPhosphine and Aryl Ligands in Palladium Complexes and Its Relation to Important Coupling Processes. Syntheses and Crystal Structures of a Family of Palladium Phosphino, Triflato, Perchlorato, and Aquo-2-(arylazo)aryl Complexes

descriptionPublicationkeyboard_double_arrow_right Article 01 May 1997 English Publisher:American Chemical Society (ACS)Journal:Organometallics, volume 16, pages 2,127-2,138 (issn: 0276-7333, eissn: 1520-6041,

Authors: and Aurelia Arcas; Peter G. Jones; Delia Bautista; José Vicente;

doi: 10.1021/om961094h

The Difficulty of Coordinating MutuallytransPhosphine and Aryl Ligands in Palladium Complexes and Its Relation to Important Coupling Processes. Syntheses and Crystal Structures of a Family of Palladium Phosphino, Triflato, Perchlorato, and Aquo-2-(arylazo)aryl Complexes

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Abstract

The reaction between [Pd(C6H3NNR-2, X-5)Cl]2 and phosphines gives [Pd(C6H3NNTo-2,Me-5)Cl(L)] [To = C6H4Me-4, L = PEt3 (1a), PPh2Me (1b)] or trans-[Pd(C6H3N2To-2,Me-5)ClL2] (L = PEt3 (2a), PPh2Me (2b), L2 = bis(diphenylphosphino)methane = dppm (2c)) or trans-[Pd(C6H3N2X-2, R-5)Cl(μ-dppm)]2 (X = Me, R = To (3a); X = H, R = Ph (3b)), depending on the molar ratio of the reagents. Tl(OTf) (OTf = O3SCF3), AgClO4, or AgSbF6 react with 1a,b, 2a, 2c, or 3a to give, variously, [Pd(C6H3NNTo-2,Me-5)(Y)(L)] (L = PEt3, Y = TfO (4a); L = PPh2Me, Y = TfO (4b), ClO4 (4b‘)), trans-[Pd(C6H3N2To-2,Me-5)(OTf)(PEt3)2] (5), [Pd(C6H3N2To-2,Me-5)(η1-dppm)(η2-dppm)]TfO (6), or [Pd(C6H3NNR-2,X-5)(η2-dppm)]Y (X = Me, R = To, Y = TfO (7a)). Complexes [Pd(C6H3NNR-2,X-5)(η2-dppm)]SbF6 (X = Me, R = To (7a‘); X = H, R = Ph (7b)) can be prepared by reacting [Pd(C6H3NNR-2,X-5)Cl]2 with AgSbF6 and dppm. Complex 4b‘ reacts with PPh2Me to give [Pd(C6H3N2To-2,Me-5)(PPh2Me)3]ClO4 (8). Attempts to obtain single crystals of 4a, [Pd(C6H3NNR-2,X-5)...

Related Organizations

University of Murcia
Spain
Technische Universität Braunschweig
Germany

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