Abstract
and Ph3Sb0 have been studied by '%b Mossbauer spectroscopy. The isomer shift, 6, decreases almost linearly with increasing number of R groups. Both the stibonic and stibinic acids have appreciable values of 7 as well as quadrupole coupling constants on the order of &lo mm s-'. Using an additive model to obtain orbital populations along the Sb ligand bonds for various assumed geometries, it is concluded that the typical Sb site in the amorphous acids has approximately trigonal-bipyramidal geometry with bridging oxygens in apical positions. The orbital population along the equatorial Sb-OH bond, UOH, is appreciably larger than the apical bOH in Ph,SbOH.
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