What is it about?
Interesting difference between perrhenate and pertechnetate was noted. Histidinium perrhenate contains anion⋯anion interactions, including those described for the first time: C–O⋯Re(O4) between the carboxyl group and the rhenium atom of the perrhenate anion. This type of interaction can be found (but was not discussed) in other Re and Mn compounds but is absent for Tc. Hirshfeld surface analysis showed that the most important contribution to the packing organization is made by the O⋯H/H⋯O interaction for cations and anions.
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Why is it important?
This may help to develop separation methods for rhenium and technetium. Also - New type of anion-anion interaction has been discovered.
Perspectives
Elaboration of separation methods for rhenium and technetium is under way. New type of anion-anion interaction that were discovered in this work may help in the design of new separation and recognition systems.
Prof Konstantin Ed. German
Frumkin Institute of Physical Chemistry and Electrochemistry RAS
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This page is a summary of: What kind of interactions we may get moving from zwitter to “dritter” ions: C–O⋯Re(O4) and Re–O⋯Re(O4) anion⋯anion interactions make structural difference between l-histidinium perrhenate and pertechnetate, CrystEngComm, January 2024, Royal Society of Chemistry,
DOI: 10.1039/d3ce01164j.
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