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A series of iridium-based complexes formed in situ, containing pyridine, phosphines, triphenylarsine, triphenylstibine, and triphenylamine as ligands, has been screened for ability to mediate ortho-exchange of hydrogen in a series of model substrates. Improved incorporation into a number of substrate classes has been achieved. The electronic properties and number of ligands at the metal centre are...
Bis(triorganophosphine)(cyclooctadiene)iridium(I) tetrafluoroborates, 2, are readily generated in situ and utilised for the exchange of deuterium into a variety of aromatic substrates. The efficiencies of deuterium exchange using 2 formed in this way are comparable to those observed in exchange processes where the isolated pre-catalysts were used.
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