Displacement,reduction, and ligand redistribution reactivity of the cationic mono-C5Me5 Ln2+ complexes (C5Me5)Ln(BPh4) (Ln = Sm,Yb) |
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| Authors: | William J Evans Justin R Walensky Timothy M Champagne Joseph W Ziller Antonio G DiPasquale Arnold L Rheingold |
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| Institution: | 1. Department of Chemistry, University of California Irvine, 1102 Natural Sciences II, Irvine, CA 92697-2025, United States;2. Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0358 La Jolla, CA 92093-0358, United States |
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| Abstract: | The reactivity of the mono(pentamethylcyclopentadienyl) divalent lanthanide tetraphenylborate complexes, (C5Me5)Ln(BPh4) (Ln = Sm, 1; Yb, 2), was investigated to determine how Ln2+ and (BPh4)1? reactivity would combine in these species. The (BPh4)1? ligand in (C5Me5)Yb(BPh4) can be displaced with KN(SiMe3)2 to form the heteroleptic divalent dimer, {(C5Me5)Ybμ-N(SiMe3)2]}2 (3). Both 1 and 2 reduce phenazine to give the bis(pentamethylcyclopentadienyl) ligand redistribution products, (C5Me5)2Ln]2(μ-C12H8N2). 2,2-Bipyridine is reduced by 1 to yield the ligand redistribution product, (C5Me5)2Sm(C10H8N2) (4), while 2 does not react with bipyridine. Tert-butyl chloride is reduced by 1 to form the trimetallic pentachloride complex {(C5Me5)(THF)Sm}3(μ-Cl)5]BPh4] (6), in a reaction that appears to use the reductive capacity of both Sm2+ and (BPh4)1?. |
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