Synthesis of new palladium(II) compounds with several bidentate nitrogen-donor ligands: Structural analyses by 1H and 13C{1H} NMR spectroscopy and crystal structures
作者:Anna Pañella、Josefina Pons、Jordi García-Antón、Xavier Solans、Mercè Font-Bardia、Josep Ros
DOI:10.1016/j.ica.2005.09.069
日期:2006.5
The reaction of [PdCl2(CH3CN)(2)] with N-alkylaminopyrazole (NN') ligands, 1-[2-(ethylamino)ethyl]-3,5-dimethylpyrazole (deae), 1-[2-('propylamino)ethyl]-3,5-dimethylpyrazole (deai), and 1-[2-('butylamino)ethyl]-3,5-dimethylpyrazole (deat), affords a series of square planar Pd(II) complexes [PdCl2(NN')] (NN' = deae (1), deai (2) and deat (3)). The solid-state structures of complexes 1 and 3 were determined by single crystal X-ray diffraction studies. The NN' ligands are coordinated through the N-pz and N-amine atoms to the metal atom, which completes its coordination with two chlorine atoms in a cis disposition. These palladium(II) compounds were characterised by elemental analyses, conductivity measurements, IR, H-1 and C-13(H-1) NMR spectroscopies. The NMR studies of the complexes prove the rigid conformation of the ligands when they are complexed. (c) 2006 Elsevier B.V. All rights reserved.