The author of 《Influence of Hydrogen Bonds in 1:1 Complexes of Phosphinic Acids with Substituted Pyridines on 1H and 31P NMR Chemical Shifts》 were Giba, Ivan S.; Mulloyarova, Valeria V.; Denisov, Gleb S.; Tolstoy, Peter M.. And the article was published in Journal of Physical Chemistry A in 2019. Recommanded Product: 100-48-1 The author mentioned the following in the article:
Two series of 1:1 complexes with strong OHN hydrogen bonds formed by dimethylphosphinic and phenylphosphinic acids with 10 substituted pyridines were studied exptl. by liquid state NMR spectroscopy at 100 K in solution in a low-freezing polar aprotic solvent mixture CDF3/CDClF2. The hydrogen bond geometries were estimated using previously established correlations linking 1H NMR chem. shifts of bridging protons with the O···H and H···N interat. distances. A new correlation is proposed allowing one to estimate the interat. distance within the OHN bridge from the displacement of 31P NMR signal upon complexation. We show that the values of 31P NMR chem. shifts are affected by an addnl. CH···O hydrogen bond formed between the P=O group of the acid and ortho-CH proton of the substituted pyridines. Breaking of this bond in the case of 2,6-disubstituted bases shifts the 31P NMR signal by ca. 1.5 ppm to the high field. The experimental part of the paper was very detailed, including the reaction process of 4-Cyanopyridine(cas: 100-48-1Recommanded Product: 100-48-1)
4-Cyanopyridine(cas: 100-48-1) belongs to pyridine. Pyridines form stable salts with strong acids. Pyridine itself is often used to neutralize acid formed in a reaction and as a basic solvent. Recommanded Product: 100-48-1