Synthesis of the (N2)3− Radical from Y2+ and Its Protonolysis Reactivity To Form (N2H2)2− via the Y[N(SiMe3)2]3/KC8 Reduction System
| Autor: | Robert J. Doedens, Filipp Furche, Joseph W. Ziller, David S. Lee, William J. Evans, Ming Fang, Jefferson E. Bates |
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| Rok vydání: | 2011 |
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| Zdroj: | Journal of the American Chemical Society. 133:3784-3787 |
| ISSN: | 1520-5126 0002-7863 |
| Popis: | Examination of the Y[N(SiMe(3))(2)](3)/KC(8) reduction system that allowed isolation of the (N(2))(3-) radical has led to the first evidence of Y(2+) in solution. The deep-blue solutions obtained from Y[N(SiMe(3))(2)](3) and KC(8) in THF at -35 °C under argon have EPR spectra containing a doublet at g(iso) = 1.976 with a 110 G hyperfine coupling constant. The solutions react with N(2) to generate (N(2))(2-) and (N(2))(3-) complexes {[(Me(3)Si)(2)N](2)(THF)Y}(2)(μ-η(2):η(2)-N(2)) (1) and {[(Me(3)Si)(2)N](2)(THF)Y}(2)(μ-η(2):η(2)-N(2))[K(THF)(6)] (2), respectively, and demonstrate that the Y[N(SiMe(3))(2)](3)/KC(8) reaction can proceed through an Y(2+) intermediate. The reactivity of (N(2))(3-) radical with proton sources was probed for the first time for comparison with the (N(2))(2-) and (N(2))(4-) chemistry. Complex 2 reacts with [Et(3)NH][BPh(4)] to form {[(Me(3)Si)(2)N](2)(THF)Y}(2)(μ-N(2)H(2)), the first lanthanide (N(2)H(2))(2-) complex derived from dinitrogen, as well as 1 as a byproduct, consistent with radical disproportionation reactivity. |
| Databáze: | OpenAIRE |
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