Synthesis, X-ray structure and reactivity of cyclopalladated complexes of hydrazones of 1H-indole-3-carboxaldehyde

Article abstract of DOI:10.1016/0022-328X(94)05113-P

By reaction of Li2 with substituted hydrazones of 1H-indole-3-carboxaldehyde the corresponding cyclopalladated complexes have been isolated and characterized.Compound 1a reacts with PPh3 by halogen displacement giving the cationic complex 5 the X-ray structure of which has revealed metallation at position 4 of the indole hydrazone, which is terdentate forming a <5,6>-fused ring system. Keywords: Palladium; Cyclopalladation; X-ray structure; Aldehyde hydrazones; Metallation; Hydrazones