Observation of a non-H-bond-stabilized tautomeric imine-enamine equilibrium in iminoacyl-palladium complexes

Article abstract of DOI:10.1021/om00005a009

Iminoacyl complexes of the type trans-Pd-(C(=NBu^t)(CH₂C₆H ₄-p-X))Cl(PR₃)₂ exist in solution as equilibrium mixtures of their imine and enamine forms. The position of the equilibria can be tuned by varying the X substituent of the aryl ring and the phosphine ligands, allowing in some cases the isolation of compounds that exist as the less common enamine form, both in solution and in the solid state.