Five-coordinate bis(Se-benzeneseleninato)tris(ethylenediamine)nickel(II) complexes are obtained by reaction of the Ni(H2O)2(XC6H4SeO2)2 complexes (X = H,p-Cl,m-Cl,m-Br orp-Me) with ethylenediamine. All the diaquo complexes react with three moles of ethylenediamine to form Se-seleninato derivatives. The compounds are characterized on the basis of far i.r. and near i.r. spectroscopy, electronic spectra and magnetochemical investigations. The most attainable geometry is the square pyramidal, probably slightly distorted; tentative assignments for the electronic spectra are proposed. Conductivity data indicate that these new complexes are nonelectrolytes; both areneseleninato and ethylenediamine behave as monodentate ligands. The magnetic moments show that all the complexes are of high-spin type, the values lying within the ranges observed for other high-spin five-coordinate nickel(II) complexes.
The reactivity of areneseleninato complexes. New pentacoordinate nickel (II) complexes with benzeneseleninato ions and ethylenediamine as ligands / C., Preti; G., Tosi; Zannini, Paolo. - In: TRANSITION METAL CHEMISTRY. - ISSN 0082-5921. - STAMPA. - 4:(1979), pp. 123-127.
The reactivity of areneseleninato complexes. New pentacoordinate nickel (II) complexes with benzeneseleninato ions and ethylenediamine as ligands
ZANNINI, Paolo
1979
Abstract
Five-coordinate bis(Se-benzeneseleninato)tris(ethylenediamine)nickel(II) complexes are obtained by reaction of the Ni(H2O)2(XC6H4SeO2)2 complexes (X = H,p-Cl,m-Cl,m-Br orp-Me) with ethylenediamine. All the diaquo complexes react with three moles of ethylenediamine to form Se-seleninato derivatives. The compounds are characterized on the basis of far i.r. and near i.r. spectroscopy, electronic spectra and magnetochemical investigations. The most attainable geometry is the square pyramidal, probably slightly distorted; tentative assignments for the electronic spectra are proposed. Conductivity data indicate that these new complexes are nonelectrolytes; both areneseleninato and ethylenediamine behave as monodentate ligands. The magnetic moments show that all the complexes are of high-spin type, the values lying within the ranges observed for other high-spin five-coordinate nickel(II) complexes.Pubblicazioni consigliate
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