
%0 Journal Article
%A Preti, C 
%A Tassi, L 
%A Tosi, G 
%A Zannini, P 
%A Zanoli, AF 
%T Cycloserine derivatives as ligands. The coordinating ability of 4,4'-[1,4-Phenylenebis(methylidynenitrilo)]bis(isoxazolidin-3-one) towards chromium(III), ruthenium(III) and rhodium(III) halides
%J Australian Journal of Chemistry
%D 1982/09/01
%V 35
%N 9
%P 1829-1840
%K 
%R https://doi.org/10.1071/CH9821829
%U https://www.publish.csiro.au/paper/CH9821829 
%X The complexes of the cycloserine derivative, 4,4'-[1,4-phenylenebis(methylidynenitrilo)]bis(isoxazolidin-3-one) or terizidone, with chromium(III), ruthenium(III) and rhodium(III) have been synthetized; their structures have been suggested on the basis of analytical, conductivity, spectral (visible, infrared and far-infrared) and magnetic data, and the thermal analyses have revealed the extent of coordinated water among the chromium and ruthenium complexes. The various ligand field parameters have been evaluated; the B' values suggest a strong covalency in the metal-ligand &#963; bond and the Dq values show a medium-strong ligand field. The position and multiplicity of the metal-halogen stretching modes in the far-infrared region have been extensively investigated and discussed; the results are particularly useful in distinguishing between the mer- and fac-isomers in the octahedral compounds of the ML3X3 type. The ligand is monodentate O-bonded or N-bonded through the oxygen of the keto group or through the nitrogen of the imino group of the isoxazole ring. We have never observed a metal-induced cycloserine ring opening under the present experimental conditions. 
