Structural correlations for (1)H, (13)C and (15)N NMR coordination shifts in Au(III), Pd(II) and Pt(II) chloride complexes with lutidines and collidine

• Published in: Magnetic resonance in chemistry Vol. 48; no. 6; pp. 417 - 426
• Main Authors: Pazderski, Leszek, Pawlak, Tomasz, Sitkowski, Jerzy, Kozerski, Lech, Szłyk, Edward
• Format: Journal Article
• Language: English
• Published: England 01.06.2010
• Subjects: Carbon Isotopes - chemistry; Chlorides - chemistry; Gold - chemistry; Magnetic Resonance Spectroscopy - methods; Molecular Conformation; Nitrogen Isotopes - chemistry; Palladium - chemistry; Platinum - chemistry; Protons; Pyridines - chemistry
• ISSN: 1097-458X
• DOI: 10.1002/mrc.2594

(1)H, (13)C and (15)N NMR studies of gold(III), palladium(II) and platinum(II) chloride complexes with dimethylpyridines (lutidines: 2,3-lutidine, 2,3lut; 2,4-lutidine, 2,4lut; 3,5-lutidine, 3,5lut; 2,6-lutidine, 2,6lut) and 2,4,6-trimethylpyridine (2,4,6-collidine, 2,4,6col) having general formulae [AuLCl(3)], trans-[PdL(2)Cl(2)] and trans-/cis-[PtL(2)Cl(2)] were performed and the respective chemical shifts (delta(1H), delta(13C), delta(15N)) reported. The deshielding of protons and carbons, as well as the shielding of nitrogens was observed. The (1)H, (13)C and (15)N NMR coordination shifts (Delta(1H) (coord), Delta(13C) (coord), Delta(15N) (coord); Delta(coord) = delta(complex) - delta(ligand)) were discussed in relation to some structural features of the title complexes, such as the type of the central atom [Au(III), Pd(II), Pt(II)], geometry (trans- or cis-), metal-nitrogen bond lengths and the position of both methyl groups in the pyridine ring system.