Abstract
New complexes of tin(II), silver([) and iron(II) withpara- andmeta-substituted benzeneseleninic acids are reported and studied by chemical analyses, spectroscopic methods, conductivity and magnetic measurements. The complexes, of the type Sn(XC6H4SeO2)2, Ag(XC6H4SeO2) and Fe(H2O)2(XC6H4SeO2)2, were obtained by reaction of SnCl2, · 2 H2O. AgNO3 and Fe(NH4)2(SO4)2·6 H2O with the sodium benzeneseleninates, XC6H4SeO2Na (X = H.p-Cl,m-Cl,p-Br,m-Br orp-Me). The i.r. spectral data suggest that the silver and iron complexes contain RSeO 2 − ligands which act as bidentates in O,O′-seleninato complexes. All the iron complexes have a distorted octahedralD 4h symmetry. The number of bands in the i.r. spectra of the tin derivatives indicates that there is no equivalence in the manner in which the two seleninato ligands are bonded. We could suggest that the tin atoms are intermolecularly O.O′-bonded via one RSeO 2 − group, whereas the second ligand is coordinated to the metal via one oxygen atom forming polymeric Ψ-tetrahedral derivatives.
Published Version
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