1H, 13C, and 15N NMR studies of Au(III) and Pd(II) chloride complexes and organometallics with 2-acetylpyridine and 2-benzoylpyridine

Abstract

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 δ 1H, δ 13C, and δ 15N chemical shifts of the same atom in the complex and ligand molecules: Δ coord 1 H = δ complex 1 H - δ ligand 1 H, Δ coord 13 C = δ complex 13 C - δ ligand 13 C, Δ coord 15 N = δ complex 15 N - δ ligand 15 N) 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. © 2013 Daria Niedzielska et al.