A series of new pyridinyliminophosphorane bidentate ligands with different steric environments [(2-C 6 H 4 N)PPh 2 = NAr (NPN)] and their methylpalladium complexes [PdClMe(NPN)] were prepared. From the crystal structure analysis it is evident that the alkyl ligands are always trans to the pyridinyl nitrogen donor, revealing a σ-donating abil-
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