Studies on closo-dodecaborate dianion derivatives uses in catalytic reactions

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2021-8-20

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Albayrak, Oğuzhan

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Icosahedral boron clusters are versatile and unique types of boron compounds due to their high symmetry, stability, and low toxicity. These clusters have negative charges. Due to the delocalization of negative charge, these boron clusters are weakly coordinating anions. Moreover, the salts of these clusters could be dissolved in organic solvents. With these in mind, the salts could be used in organic synthesis by making the positively charged counter cation for catalytic activity. That is, in the metal salts of these clusters, metal cations are considered to be ‘naked’. In this study, the synthesis of unsubstituted closo-dodecaborate dianion was synthesized from sodium borohydride. Amino and oxo derivatives are synthesized and characterized. Both periodinated and perchlorinated derivatives were also synthesized, isolated and the effects on the catalytic activity of copper cation were studied. It was found that a ligand for copper is necessary to carry out Cu-mediated Ullmann’s coupling and Cu-mediated TEMPO alcohol oxidation reactions.

Subject Keywords

Boranes, Closo-dodecaboranes, Copper catalysis, Perhalogenated boranes, Borane derivatives

URI

https://hdl.handle.net/11511/92057

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

O. Albayrak, “Studies on closo-dodecaborate dianion derivatives uses in catalytic reactions,” M.S. - Master of Science, Middle East Technical University, 2021.