𝔖 Bobbio Scriptorium
✦   LIBER   ✦

IR and PMR studies of proton transfer in complexes of 4-R-pyridine N-oxides with trifluoroacetic acid in solutions

✍ Scribed by B. Brycki; Z. Dega-Szafran; M. Szafran

Publisher
Elsevier Science
Year
1979
Weight
479 KB
Volume
15
Category
Article
ISSN
0378-4487

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Nitrogen-15 NMR studies of hydrogen bond
Nitrogen-15 NMR studies of hydrogen bonding and proton transfer in complexes of pyridine N-oxides with dichloroacetic acid in CDCl3
✍ Zofia Dega-Szafran; Mirosław Szafran; Jerzy Sitkowski; Lech Stefaniak 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 387 KB 👁 2 views

The "N NMR chemical shifts of eight substituted pyridine N-oxides (B) and their complexes (AHB) with methanol and dichloroacetic and trifluoromethanesulfonic acids were measured in chloroform-d at the natural abundance level. The measured chemical shifts are strongly affected by substituents, hydrog

1H and 13C NMR studies of the proton tra
1H and 13C NMR studies of the proton transfer in complexes of substituted phenols with trimethylamine N-oxide
✍ Bogumil Brycki; Bogumil Brzezinski; Georg Zundel; Thomas Keil 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 309 KB

## Abstract Substituted phenol–trimethylamine __N__‐oxide (TMAO) systems were studied. The ^1^H chemical shift of the hydrogen‐bonded proton first increases with decreasing p__K__~a~ of the phenols and, after a sharp maximum, it then decreases. Thus, the shielding of the hydrogen‐bonded proton by t

An n.m.r. study of the products of oxida
An n.m.r. study of the products of oxidation of cellulose and (1 → 4)-β-d-xylan with sodium nitrite in orthophosphoric acid
✍ Rolf Andersson; James Hoffman; Nilufar Nahar; Elisabeth Scholander 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 463 KB

Oxidation of polysaccharides with sodium nitrite in orthophosphoric acid converts a substantial portion of the monosaccharides having primary hydroxyl groups unsubstituted into uranic acids'-'. The extent of oxidation at secondary positions, particularly position 3 in dextran, was high when the conc