13274-68-5Relevant academic research and scientific papers
Highly strong complexation of carboxylates with 1-alkylpyridinium receptors in polar solvents
Jeong, Kyu-Sung,Cho, Young Lag
, p. 3279 - 3282 (1997)
Mono- and bispyridinium salts are shown to bind strongly with carboxylates in polar media through multiple hydrogen bonds and additional electrostatic interactions. The association constants of monopyridinium salt with various benzoates are in the range of 110-430 M-1 in DMSO-d6, depending on substituents, while those between bispyridinium salts and adipate are >103 M-1 in 10% D2O/DMSO-d6.
Donor Strength Determination of Pyridinylidene-amide Ligands using Their Palladium-NHC Complexes
Huynh, Han Vinh,Vossen, Jeroen Thomas
supporting information, p. 12486 - 12493 (2020/09/02)
Pyridinylidene-amides (PYAs) are a relatively new type of N-donor ligands that can exist in three isomeric forms and adopt various resonance structures. This makes them electronically flexible, and in order to evaluate their electronic profile using the Huynh electronic parameter (HEP), seven structurally diverse mixed N-heterocyclic carbenes (NHCs)/PYA palladium complexes of the type trans-[PdBr2(iPr2-bimy)(PYA)] were prepared and fully characterized by various spectroscopic and spectrometric methods. This study shows that PYAs are among the strongest, formally neutral N-donors, but they are still weaker than phosphines and organometallic ligands such as NHCs. Notably, the donating abilities of isomeric PYAs are distinct and can be further fine-tuned by the choice of two substituents making them structurally and electronically versatile. These characteristics and the ease of their preparation hold promise for a wide applicability in coordination chemistry.
