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• 835633-34-6 [Pd(dimethylbenzylamine(-1H))(κ2-P,O-PPh2NC(O)Me)] 

Relevant academic research and scientific papers

Palladium phosphino-iminolate complexes as metalloligands for coinage metals: A versatile, ambivalent behavior

Reactivity studies with the bis-chelated Pd(II) phosphino-iminolate complex [Pd(dmba)-(k2-P,O-PPh2N-C(-O)Me)] (2) (dmba = orthometalated dimethylbenzylamine) have shown that it readily reacts as a metalloligand with electrophilic complexes of the coinage metals, selectively via the nitrogen atom of the P,O chelate. After examining its reaction with AgOTf (OTf = SO3CF3), which afforded the first 1-D coordination polymer containing Ag-Pd bonds, [{Ag(2)}OTf]n (3·OTf), we have examined and compared its reactions with H+, Au(PPh3)+, [AuCl(THT)], [Au(THT)]BF4, and [Cu(NCMe)4]BF4. Depending on the nature of the electrophilic metal reagent used, the interaction between the iminolate N atom of 2 and the electrophile can be formally described as a dative bond involving its lone pair, which would formally place the positive charge of the complex more on the coinage metal, or as a more covalent interaction resulting in an increased carbon-oxygen bond order and thus in the pos-/baitive charge being more localized on the Pd(II) center. In the former case, the metalloligand formally behaves as a two-electron, L-type donor, whereas in the latter, as a one-electron, X-type donor ligand. This ambivalent behavior explains the formation of the heterobimetallic complexes [{Pd(dmba)(k 2-P,O-PPh2NC(O)Me)}AuCl] (6) and [{Pd(dmba)(k 2-P,O-PPh2NC(O)Me)}Au(PPh3)]OTf ([Au(PPh 3)(2)]OTf) or [{Pd(dmba)(k2-P,O-PPh 2NC(O)Me)}Au(THT)BF4 (7·BF4), respectively. Double substitution of the d10 metal center by 2 afforded the Pd/Au/Pd and Pd/Cu/Pd heterotrinuclear complexes [{Pd(dmba)(k 2-P,O-PPh2NC(O)Me)}2Au]BF4 (8·BF4) and [{Pd(dmba)(k2-P,O-PPh 2NC(O)Me)}2Cu]BF4 (9·BF4), respectively. The complexes 2, 5·OTf, 6, 7·BF4, 8·BF4·2CH2Cl2, and 9·BF4 have been structurally characterized by X-ray diffraction.