849796-70-9Relevant academic research and scientific papers
Effects of the intramolecular nh...s hydrogen bond in mononuclear platinum(ll) and palladium(ll) complexes with 2,2 -bipyridine and benzenethiol derivatives
Kato, Masahiro,Okamura, Taka-Akl,Yamamoto, Hitoshi,Ueyama, Norikazu
, p. 1966 - 1972 (2005)
A series of complexes, [M(bpy)(SAr)2] (M = platinum(ll) or palladium(ll), bpy = 2,2 -bipyridine, SAr = 2- or 4-(acylamino)benzenethiolate, or 2-(alkylcarbamoyl)benzenethiolate), were synthesized and characterized on the basis of 1H NMR, IR, and electrochemical properties. The structures of [Pt(bpy)(S-2-Ph3CCONHC6H4)2] (1) and [Pt(bpy)(S-2-f-BuNHCOC6H4)2] (3) were determined by X-ray analysis. The complexes have intramolecular NH...S hydrogen bonds between the amide NH group and the sulfur atom. A weak NH-S hydrogen bond in these complexes and [Pd(bpy)(S-2-Ph3CCONHC 6H4)2] (4) is detected from the 1H NMR spectra and the IR spectra in chloroform and in the solid state. [Pt(bpy)(S-2-Ph3CCONHC6H4)2] (1) exhibits a remarkably high-energy-shifted lowest-energy band in UV-visible spectra and has a positively shifted oxidation potential. The blue-shift of 42 nm and the positive shift of +0.24 V, as compared to those of [Pt(bpy)(SC6H 5)2], are due to the effect of the NH-S hydrogen bond.
