Microwave irradiation efficiently assists extraction of substitution-inert platinum group metals like Ru­(III) and Rh­(III) from HNO3(aq) to betainium bis­(trifluoromethylsulfonyl)­amide ([Hbet]­[Tf2N]) ionic liquid to give nearly quantitative yields within 101–102 s. The rapid microwave heating also facilitates to mix the aqueous/IL biphasic system homogeneously without vigorous shaking because of its thermomorphic behavior. Rapid and efficient extraction of substitution-inert platinum group metals has been achieved in use of thermomorphic ionic liquid and microwave irradiation.

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