1H, 13C, and 15N NMR Studies of Au(III)‎ and Pd(II)‎ Chloride Complexes and Organometallics with 2-Acetylpyridine and 2-Benzoylpyridine

Abstract EN

Au(III) and Pd(II) chloride complexes with N(1),O-chelating 2-acetylpyridine (2apy) and N(1)- monodentately binding 2-benzoylpyridine (2bz′py)-[Pd(2apy)Cl2], [Au(2bz′py)Cl3], trans-[Pd(2bz′py)2Cl2], as well as Au(III) chloride organometallics with monoanionic forms of 2apy or 2bz′py, deprotonated at the acetyl or benzyl side groups (2apy*, 2bz′py*)-[Au(2apy*)Cl2], [Au(2bz′py*)Cl2], were studied by 1H, 13C, and 15N NMR.

1H, 13C, and 15N coordination shifts (i.e., differences between the respective δ1H, δ13C, and δ15N chemical shifts of the same atom in the complex and ligand molecules: Δcoord1H=δcomplex1H-δligand1H, Δcoord13C=δcomplex13C-δligand13C, Δcoord15N=δcomplex15N-δligand15N) were discussed in relation to the molecular structures and coordination modes, as well as to the factors potentially influencing nuclear shielding.

Analogous NMR measurements were performed for the new (2bz′pyH)[AuCl4] salt.