Abstract
Abstract45Sc NMR parameters of isomeric ScIII hexacoordinated complexes ScCl6−nLnn−3 formed by the interaction of ScCl3 with donor monodentate molecules of trimethyl phosphate, dimethyl sulphoxide, dimethylformamide, dimethylacetamide, formamide, tetramethylurea and Ph3PO in non‐aqueous solutions of CH3CN, CH3NO2, (CH3)2CO, CH3C(O)OC2H5, C4H8O and (C2H5)2O are reported. cis‐ScCl3(TMP)3 has been shown to be the preferred species in solvents of low polarity. Increasing polarity of the medium leads to an increase in the relative concentration of trans‐ScCl3(TMP)3, which has been explained in terms of the different solvation of cis and trans molecules owing to the difference in their polarity. The range of 45Sc NMR chemical shifts in scandium complexes covers ca 340 ppm.
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