Guo, Zhifang, Deacon, Glen B., and Junk, Peter C. (2023) Never a dull moment with praseodymium metal. Dalton Transactions, 52 (20). pp. 6619-6623.

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Abstract

Unexpectedly, a mixture of bismuth N,N′-bis(2,6-diisopropylphenyl)formamidinates in three different oxidation states namely, [BiI2(DippForm)2] (1), [BiII2(DippForm)2(C6F5)2] (2) and [BiIII(DippForm)2(C6F5)] (3), together with [Pr(DippForm)2F(thf)]·PhMe (4), [p-HC6F4DippForm]·0.5thf (5), and a ring-opened tetrahydrofuran [o-HC6F4O(CH2)4DippForm] (6) was obtained by the reaction of an excess of praseodymium metal with tris(pentafluorophenyl)bismuth, [Bi(C6F5)3]·0.5dioxane, and bulky N,N′-bis(2,6-diisopropylphenyl)formamidine (DippFormH) in tetrahydrofuran. Similar reactions between praseodymium metal, [Bi(C6F5)3]·0.5dioxane and 3,5-diphenylpyrazole (Ph2pzH), or 3,5-di-tert-butylpyrazole (tBu2pzH), yielded the paddlewheel dibismuthanes [BiII2(Ph2pz)4]·dioxane (7) and [BiII2(tBu2pz)4] (8) respectively.

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