77Se NMR chemical shifts

Table 6 77Se NMR chemical shift of tetraphosphorylselenophene and related compounds

Compound 77Se-NMR chemical shift l25Te-NMR chemical shift 29Si-NMR chemical shift "9Sn-NMR chemical shift 

T. Klapotke and M. Broschag Compilation of Reported 77Se NMR Chemical Shifts , Wiley, Chichester, 1996. 

There has been an ab initio calculation of 77Se chemical shifts for SxSe4 x2+ (where x = 0-3).834 The 77Se NMR spectra of PhSeCH = C(SePh)R (R = 

Only for three selenete complexes 12a, 12b, and 18 have 77Se NMR data been reported <1995CC2461>. The chemical shifts of 77Se NMR spectra in the selenetes are compiled in Table 4. 

Another study of the surface structure of CdSe NCs of 3.7 nm size used 31P MAS-NMR and 31P/77Se rotational-echo double-resonance (REDOR) to identify overlapping broad peaks from two surface species trioctylphosphine oxide (TOPO) at 29.3 ppm and trioctylphosphine selenide (TOPSe) at 22.2 ppm [343]. Both the isotropic chemical shift and CSA of the surface-bound TOPO were substantially different from those of the free ligand. Spin-echo experiments on 31P were stated to indicate an average P-P distance of 8-10 A at the surface, consistent with capping at alternate atomic sites (all Cd but not Se). 

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