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Polylithiated Tetraaminosilanes: Synthesis and Characterization of (Et<sub>2</sub>O·Li)<sub>4</sub>[Si(Nnaph)<sub>4</sub>] and X-ray Structure of {THF·Li<sub>3</sub>[Si(N<sup>i</sup>Pr)<sub>3</sub>(NH<sup>i</sup>Pr)]}<sub>2</sub>
21
Citations
25
References
2000
Year
Materials ScienceInorganic ChemistryCyclic LadderEngineeringX-ray StructureExcess Tbunh3clBis-thf-solvated Li6Main Group ChemistryChemistryInorganic MaterialCrystallographyInorganic SynthesisBiomolecular EngineeringInorganic Compound
The treatment of SiCl4 with 4 equiv of Li2(Nnaph) (naph = 1-naphthyl) in diethyl ether gives (Et2O.Li)4[Si(Nnaph)4] (4), which, upon reaction with excess tBuNH3Cl or MeO3SCF3, generates Si[N(H)naph]4 (5) or Si[N(Me)naph]4 (6), respectively. The centrosymmetric dimer (THF.Li3[Si(NiPr)3(NHiPr)])2 (7), formed via trilithiation of Si[N(H)iPr]4 with n-butyllithium, consists of a bis-THF-solvated Li6(NiPr)6 cyclic ladder bicapped by two SiN(H)iPr units. Crystal data for 7: C32H74Li6N8O2Si2, monoclinic, P2(1)/n, a = 10.661(7) A, b = 16.964(5) A, c = 12.405(4) A, beta = 93.22(4) degrees, V = 2239.9(15) A3, and Z = 2.
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