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Submitted on 1 Jan 1980
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LONE PAIR ELECTRONS AND 121Sb MÖSSBAUER SPECTROSCOPY
J. Stevens, J. Trooster, H. Meinema
To cite this version:
J. Stevens, J. Trooster, H. Meinema. LONE PAIR ELECTRONS AND 121Sb MÖSS- BAUER SPECTROSCOPY. Journal de Physique Colloques, 1980, 41 (C1), pp.C1-323-C1-323.
�10.1051/jphyscol:19801119�. �jpa-00219601�
JOURNAL DE PHYSIQUE
Colloque C1, suppl6ment au n
O 1 ,Tome 41, janvier 1980, page C1-323
LONE PAIR ELECTRONS AND 12%b M~~SSBAUER SPECTROSCOPY
J.G. Stevens, J.M.
rooster'
and H.A. Meinema*
Chemistry Department, University of North Carolina, Asheville, N.C. 28804, USA.
+
Molecuzar Spectroscopy, University of Nijmegen, The Netherlands.*
Organic Chemical I n s t i t u t e TNO, Utrecht, The Netherlands.Lone pair electrons are quite common-.
ly found in a variety of different struc- tures in Group V A compounds, most often in cases in which the elements are in the three oxidation state. They need to be understood fully before the bonding and structure of the compounds containing them can be satisfactorily explained.
We have studied two groups of antimony substances, most of which contain lone pairs. In one group thirteen antimony(II1)- dithiocarbamates (dtc) complexes were
studied a t liquid helium temperature.
In these the dithiocarbamate ligands occur a s an ion, a monodentate, an aniso-
bidentate, or a bidentate species. For most of these complexes, good interpreta- tion of the available data would have been impossible without assuming the presence of steric active lone pair electrons.
tt6ssbauer spectra of the MexSbC13-x series were also obtained and are given in the table. Using this data, we are able to treat the lone pair electron orbital as a ligand and determine its effect on the overall antimony bonding. In addition, it is possible to assign partial quadrupole splitting and partial chemical shift values for the lone pair.
m b l e . 12'.Sb ~ 6 s s b a u e r parameters for Me,SbC13-x. Data taken at 4.2. and isomer shift relative to InSb.
x
6
(mm/s) e2qq (mm/s)h
+ Full text published elsewhere.
Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphyscol:19801119
