✦ LIBER ✦

13C, 77Se and 125Te NMR in ortho-halogenated seleno- and telluro-phenetoles

✍ Scribed by Marcel Baiwir; Gabriel Llabrès; André Luxen; Léon Christiaens; Jean-Louis Piette

Publisher: John Wiley and Sons
Year: 1984
Tongue: English
Weight: 414 KB
Volume: 22
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270220508

No coin nor oath required. For personal study only.

✦ Synopsis

Se and v e chemical shifts have been measured for 0-halogenated seleno-and telluro-phenetoles. Correlations exist between these parameters and the halogen electronegativities or the 13C chemical shifts, except for the fluorine derivatives. The chalcogen shifts are related to the shifts of various nuclei in halobenzene derivatives, namely *H in benzenes, "C in toluenes, 15N in d i n e s and "F in fluorobenzenes. chemical shifts are correlated in the 0-halogenated seleno-and telluro-phenetoles and in chalcogen analogues of 0-methoxy-selenoanisole and -tellmophenetole: ASpe) = 1.60AS(Se). The observed gradient is close to values previously reported for other selenides and tellurides, but differs from the value observed in heterocycles. This observation is discussed. R Se and 77

📜 SIMILAR VOLUMES

Low-temperature 1H, 13C, 77Se, and 125Te

Low-temperature 1H, 13C, 77Se, and 125Te NMR studies on the apical-apical ligand exchange via the hypervalent tellurium and selenium ate complexes [10-M-3(C3); M = Se, Te] in the reactions of diaryl tellurides and selenides with aryllithium reagents

✍ Yutaka Masutomi; Naomichi Furukawa; Tomoki Erata 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 742 KB

Pentafluorophenyl phenyl telluride (1) and 3,5-dichloro-2,4,6-trifluorophenyl phenyl telluride (2) react with pentafluorophenyllithium or 3,5-dichloro-2,4,6trifluorophenyllithium in THF at low temperatures to form the corresponding tellurium ate complexes (A) and (B) as sole intermediates in the lig