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There are two theories, S N1 and S N2, for the mechanism of the deaquation of aquopentaamincobalt(III) bromide (AAC-B). Both of the theories are supported by some experimental and calculated data. But there are not any experiments to determine directly the structure of the intermediates at different reaction time. In this paper the structures of the intermediates at different reaction time in deaquation-anation of AACB were determined by extended X-ray absorption fine structure (EXAFS) and the reaction process was studied by the combination of X-ray powder diffraction and EXAFS. It was demonstrated that the deaquation-anation of AACB obeys the S N2 theory.
There are two theories, S N1 and S N2, for the mechanism of the deaquation of aquopentaamincobalt (III) bromide (AAC-B). Both of the theories are supported by some experimental and calculated data. directly the structure of the intermediates at different reaction time. In this paper the structures of the intermediates at different reaction time in deaquation-anation of AACB were determined by extended X-ray absorption fine structure (EXAFS) and the reaction process was studied by the combination of X-ray powder diffraction and EXAFS. It was demonstrated that the deaquation-anation of AACB obeys the S N2 theory.