863097-01-2Relevant academic research and scientific papers
Coordination chemistry of inversely polarized phosphaalkenes toward group 10 metal centers
Boubekeur, Lela,Ricard, Louis,Floch, Pascal Le,Mezailles, Nicolas
, p. 3856 - 3863 (2008/10/09)
A series of palladium and platinum complexes containing inversely polarized phosphaalkenes (Me2N)(R)C=PR′ (R = H, R′ = Mes*, 2; R = Me, R′ = Mes*, 3; R = H, R′ = Mes, 4), exhibiting different steric and electronic environments, have been synthesized. Ligand 2 coordinates in n1-P fashion to either palladium (PdCl 2(n1-P)2, 5) or platinum (cis-Pt(Cl)2(n 1P)2, 6; trans-Pt(Cl)2(n1-P) 2, 7). The equimolar reaction of 3 with Pd(COD)Cl2 afforded a mixture in 3/1 ratio of cyclopalladated dimeric complexes [PdCl(k2-P,C-CH2N(Me)CH= PMes*)]2, 9 (eis isomer) and 9′ (trans isomer). The latter was characterized by X-ray diffraction. The less hindered ligand 4 acts as bridging phosphido-like ligand with both palladium (μ-P-[PdCl2(MesP=CH(NMe2))]2,11) and platinium (μ-P-[PtCl2(MesP=CH(NMe2))]2, 12). In the platinum case, the reaction of two or more equivalents of the ligand 4 gave a mixture of the complex containing 2 ligands/Pt and the cationic complex with 3 ligands/Pt, 13. This complex was isolated from the reaction of 3.5 equiv of 4 with the Pt precursor.
