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Abstract
Twelve new complexes with the general formula [(Ph 3P=O) 5LnCl][FeCI 4] 2 where Ln=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Y were synthesized. The X-ray diffraction crystal structural analysis of [(Ph 3P=O) 5LaCl] [FeCl 4] 2 showed that the [(Ph 3P=O) 5LaCl] 2+ cation was of six coordinated distorted octahedral geometry and the [FeCl 4] − anion was of tetrahedral geometry. The INDO method study revealed that the coordination of PO groups to the lanthanide made the LnCl bond more reactive than that in LnCl 3, so that Lewis acids, such as FeCl 3, could abstract chloride to give the title complexes.
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