Stibines distibines

Fig. 5 Coordination modes observed for alane-stibine, distibine, -bismuthine, and dibismuthine adducts...

Distibines fall lowest in the spectrochemical series P2 > As2 > St>2,1529 a result which corresponds with the electronic spectra data for the monodentate series PEt3, AsEt3, SbEt3.1530 Mossbauer spectroscopy is a useful method for platinum stibine complexes. Coordination of the stibine causes a large increase in isomer shift and a decrease in quadrupole coupling constant in the 121Sb spectrum, as expected for the formation of a donor bond.1531... 

Table 2 summarizes important structural parameters for alane-stibine and -bismuthine adducts R3A1-ER 3, while Table 3 features those for distibines and dibismuthines precursors R2E-ER 2 (E = Sb, Bi) and the corresponding alane adducts. 

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