𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The structure of 2-carboxyphenyl methyl selenoxide, its sodium salt and related compounds in solution, studied by 1H, 13C and 77Se NMR

✍ Scribed by Warö Nakanishi; Yoshitsugu Ikeda; Hiizu Iwamura

Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
496 KB
Volume
20
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

^1^H, ^13^C and ^77^Se NMR spectra of 2‐carboxyphenyl methyl selenoxides, 2‐carboxyphenyl phenyl selenoxides, their sodium salts and related compounds have been measured to determine their structures in solution. The ^77^Se NMR chemical shifts and the J(^77^Se, ^13^C) values were found to be particularly useful in distinguishing between selenuranes and selenoxides. The downfield shifts of 286‐536 and 587‐667 ppm from selenoanisoles are characteristic of the corresponding selenuranes and selenoxides, respectively. The couplings were 61‐65 and 77‐81 Hz for the selenuranes and selenoxides, respectively. The effects of salt formation on the NMR parameters are also discussed. The results show that the carboxylic acids have the cyclic selenurane structure, whereas the salts are acyclic selenoxides.

📜 SIMILAR VOLUMES

Phenylselenenylalkanes, their adducts wi
Phenylselenenylalkanes, their adducts with the dirhodium complex Rh2(MTPA)4 and ligand exchange mechanisms in solution as studied by 1H, 13C and 77Se NMR spectroscopy
✍ Shahid Malik; Stefan Moeller; Gábor Tóth; Tamás Gáti; Muhammad Iqbal Choudhary; 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 192 KB

## Abstract Twelve secondary phenylselenenylalkanes and ‐cycloalkanes were studied by ^1^H, ^13^C and ^77^Se NMR spectroscopy in the presence of the chiral dirhodium complex Rh~2~[(__R__)‐MTPA]~4~ [Rh–Rh; MTPA‐H = (__R__)‐(+)‐methoxytrifluoromethylphenylacetic acid, Mosher's acid]. The 1 : 1 and 2

Study of stereospecificity of 1H, 13C, 1
Study of stereospecificity of 1H, 13C, 15N and 77Se shielding constants in the configurational isomers of the selenophene-2-carbaldehyde azine by NMR spectroscopy and MP2-GIAO calculations
✍ Andrei V. Afonin; Dmitry V. Pavlov; Alexander I. Albanov; Ekaterina P. Levanova; 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 210 KB

In the ^1^H and ^13^C NMR spectra of selenophene‐2‐carbaldehyde azine, the ^1^H‐5, ^13^C‐3 and ^13^C‐5 signals of the selenophene ring are shifted to higher frequencies, whereas those of the ^1^H‐1, ^13^C‐1, ^13^C‐2 and ^13^C‐4 are shifted to lower frequencies on going from the __EE__ to __ZZ__ isom