New ruthenium(II) complexes with pyridinopyrazole and pyridinopyrazoline ligands: structure study by proton, carbon-13, and ruthenium-99 NMR was written by Marzin, C.;Budde, F.;Steel, P. J.;Lerner, D.. And the article was included in New Journal of Chemistry in 1987.Application of 19959-77-4 This article mentions the following:
RuL32+ (I), Ru(bpy)L22+ (II) and Ru(bpy)2L2+ (III) (bpy = 2,2′-bipyridine; L = pyridinopyrazoles and pyridinopyrazolines) were prepared; their study allows the evaluation of the ligand π-acceptor ability on the complex properties; especially 99Ru NMR and Ru2+/Ru3+ oxidation potential measurements show a good π-acceptor behavior of 1 of the pyridinopyrazoline ligands. All II and III and most of I, emit at 77 K which is rather unusual; 1 of these gives rise to a double emission, possibly from 2 isomers. 1H and 13C NMR studies show the presence of geometric isomers for I and II and of diastereoisomeric ones for I–III when L includes a pyrazoline unit. In the experiment, the researchers used many compounds, for example, 2-(5-Methyl-1H-pyrazol-3-yl)pyridine (cas: 19959-77-4Application of 19959-77-4).
2-(5-Methyl-1H-pyrazol-3-yl)pyridine (cas: 19959-77-4) belongs to pyrazole derivatives. Pyrazole and its derivatives are considered a pharmacologically important active scaffold that possesses almost all types of pharmacological activities. Pyrazoles can be selectively lithiated at different carbons and subsequently react with electrophiles depending on the substitution patterns.Application of 19959-77-4
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics