ja036923m_si_001.cif (45.63 kB)

Reduction of Dinitrogen to Planar Bimetallic M2-η2:η2-N2) Complexes of Y, Ho, Tm, and Lu Using the K/Ln[N(SiMe3)2]3 Reduction System

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posted on 21.01.2004, 00:00 by William J. Evans, David S. Lee, Joseph W. Ziller
The reaction of Ln[N(SiMe3)2]3 with K under N2 in THF forms the dinitrogen complexes {[(Me3Si)2N]2(THF)Ln}2(μ-η2:η2-N2) (Ln = Y, Ho, Tm, and Lu) previously available only for lanthanides with highly reducing divalent states, that is, Tm, Dy, and Nd. The Y and Lu complexes are the first diamagnetic complexes of this type. The Ln2N2 moiety is planar, and the 1.268(3) and 1.285(4) Å NN distances in these complexes are consistent with the presence of (N2)2-.