254902-36-8Relevant academic research and scientific papers
Imine-enamine tautomeric equilibrium of palladium imidoyl complexes
Cámpora, Juan,Hudson, Sarah A.,Massiot, Philippe,Maya, Celia M.,Palma, Pilar,Carmona, Ernesto,Martínez-Cruz, Luis A.,Vegas, Angel
, p. 5225 - 5237 (2008/10/08)
The reaction of benzylpalladium complexes of type trans-[Pd(CH2C6H4Y)(X)(PR3) 2] (2) with isocyanides yields imidoyl complexes that exist in solution as equilibrium mixtures of the corresponding imine ([Pd(C(=NR′)CH2C6H4Y)(X)(PR 3)2],. 3-im) and enamine ([Pd-(C(NHR′=CHC6H4Y)(X)(PR3) 2, 3-en) tautomers. While the equilibrium constant is markedly affected by the electronic effect exerted by the substituents at the phenyl ring (Y), the effect of the metal fragment is less pronounced and is dominated by steric factors. Both tautomeric forms can also be found in the solid state, and the X-ray structures of complexes of type 2, 3-im, and 3-en have been determined.
