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Synthese und NMR‐Spektren einiger 13 C‐markierter Thio‐ und Seleno‐äther, ‐acetale und ‐orthoester
Author(s) -
Gabriel Josef,
Seebach Dieter
Publication year - 1984
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19840670420
Subject(s) - chemistry , orthoester , thio , nmr spectra database , chemical shift , alkyl , aryl , stereochemistry , sulfur , spectral line , coupling constant , medicinal chemistry , organic chemistry , particle physics , physics , astronomy
Synthesis and NMR Spectra of Some 13 C‐Labelled Thio‐ and Seleno‐ethers, ‐acetals, and ‐orthoesters Twenty‐seven different open‐chain and cyclic derivatives (RX) n CH 4‐ n and (RX) n CH 3‐ n R′ with n = 1−3, X = S or Se, R,R′ = alkyl or aryl, 1,3,5‐trithiane, and bis‐(dimethylsulfonio)methane and ‐methanide with single or multiple 13 C‐labelling have been synthesized. The 13 C‐NMR spectra of the sulfur and selenim compounds have been measured, and the dependence of the chemical shifts (δ c ) and coupling constants [′ J (C,H), ′ J (Se,C)] from the substitution pattern in discussed ( Fig. 1 ) and compared with the polyhalogeno‐methanes ( Fig. 2 ).