Isotope shift sulphur

In a natSi sample doped with 34S, a negative sulphur IS of — 76 jeV (—0.61cm 1) with respect to 32S is observed for the Is (T2) line of S°, and this IS becomes —87peV (—0.70 cm-1) for the 2p (S2°) line in a sample doped with natS [233], in agreement with the isotopic shift model of [132]. Inversely,... 

This attribution is confirmed by the observation of an expected isotope component (unresolved) of the 1T7 line in a silicon sample doped with sulphur enriched with isotope 33S [206]. The isotope shifts observed for 1T7 and ir8 with respect to the strongest component, noted 0 in Fig. 6.18, are given in Table 6.17. 

Deuterium isotope shifts over at least six bonds were observed in rapidly interconverting p-thioxoketone tautomers [15] using C-nmr spectroscopy (Hansen et al., 1982). The observed effects are caused by a shift of the fast enol-enethiol equilibrium (27) when the chelating proton is substituted by deuterium. Deuterium prefers attachment to oxygen as compared to sulphur... 

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