Factors affecting the lability of the Pd-N bonds in palladacycles containing a sigma(Pd-C-sp2, ferrocene) bond. X-ray crystal structures of [Pd{[(eta(5)-C5H3)-C(Me)=N-R]Fe(eta(5)-C5H5)}Cl(L)] (with R = CH2-C6H5 and L = PEt3 or R = C6H4-4-Me and L = P

摘要

The syntheses, characterization and molecular structures of the cyclopalladated complexes [Pd{[(eta (5)-C5H3)C(Me)=N-CH2-C6H5]Fe(eta -C5H5)}Cl(PEt3)] (1) and [Pd{[(eta (5)-C5H3)-C(Me)=N-C6H4-4-Me]Fe(eta (5)-C5H5)}Cl(PPh2Et)](2) are reported. A comparative study of the reactivity of 1 and 2 in front of PEt3, reveals that the Pd-N bond is more prone to cleavage in 2 than in 1. These results have been interpreted on the basis of the differences detected in the structural characteristics of this sort of derivatives. (C) 2001 Elsevier Science Ltd. All rights reserved. [References: 35]