✦ LIBER ✦

Oxidation of Palmitoyl- and Benzoylascorbate. — A13C-NMR Study

✍ Scribed by Berger, Stefan ;Otten, Martina G. ;Steinbach, Klaus

Publisher: John Wiley and Sons
Year: 1992
Tongue: English
Weight: 308 KB
Volume: 1992
Category: Article
ISSN: 0947-3440
DOI: 10.1002/jlac.1992199201172

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Ascorbic acid (1a), the 6‐benzoate and 6‐palmitate ester (1b, c) were oxidized by iodine both in D~2~O and in [D~6~]DMSO solution. The reactions were followed by ^13^C‐NMR spectroscopy. It was shown for the 6‐esters 1b, c, that, with the exclusion of water, monomeric dehydroascorbic acid esters 6b, c could be detected.

📜 SIMILAR VOLUMES

13C NMR and Crystallographic Study of Th

13C NMR and Crystallographic Study of Thymolsulfonephthalein

✍ Rosa Santillan; Norberto Farfán; Dolores Castillo; Atilano Gutiérrez; Herbert Hö 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 193 KB 👁 1 views

A 13C NMR Study of the Products and Mech

A 13C NMR Study of the Products and Mechanism of the Thermal Oxidative Degradation of Poly(ethylene oxide)

✍ Omar A. Mkhatresh; Frank Heatley 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 133 KB

## Abstract The products and mechanism of the thermal oxidative degradation of poly(ethylene oxide) at 150 °C have been analysed using ^13^C NMR spectroscopy. The analysis was assisted by the use of distortionless enhancement by polarisation transfer spectra, longitudinal relaxation time measuremen

A 13C NMR study of β-carboline alkaloids

✍ Kazuo Koike; Yohko Sakamoto; Taichi Ohmoto 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 228 KB

The 13C NMR spectra of p-carboline alkaloids were determined, and unambiguous assignments of the spectra were carried out from the long-range coupling constants.

Internal Rotation of Mutually Interactin

Internal Rotation of Mutually Interacting Methyl Groups: A13C NMR Study

✍ Reinhard Wimmer; Norbert Müller 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 166 KB

The overall and intramolecular rotational diffusion behavior of 1,3, 7,10-tetramethylbenzo[c]cinnoline was determined from longitudinal 13C NMR relaxation and 1H-13C NOE measurements in dilute chloroform solution. The four methyl groups in this compound represent three different situations of steric

Solution cation-binding properties of se

Solution cation-binding properties of segmented polyethylene oxide–A 13C NMR spectroscopic study

✍ M. Jayakannan; S. Ramakrishnan 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 216 KB 👁 1 views

A 1H and 13C NMR study of carminic acid

✍ P. Schmitt; H. Günther; G. Hägele; R. Stilke 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 326 KB

## Abstract The ^1^H and ^13^C NMR spectra of carminic acid were completely assigned, thus confirming its structure and the conformation of the glucose residue.