Abstract
The synthesis of the bis(dimethylsilyl)amide complexes [MN(SiHMe 2) 2] (M = Li ( 1), Na ( 2), K ( 3)) was accomplished in high yield (> 95%) by various standard procedures. Additionally, a novel transsilylamination reaction has been applied to synthesize the sodium derivative 2. The alkali metal amide complexes which are readily soluble in aliphatic hydrocarbons were characterized by means of IR and 1H, 13C and 29Si NMR spectroscopy. A single crystal X-ray diffraction study of the sodium derivative 2 revealed the formation of an infinite, all-planar ladder structure. Compound 2 crystallizes from n-hexane at −35°C in the orthorhombic space group Pnma with a = 5.4439(2) A ̊ , b = 15.7268(9) A ̊ , c = 10.9751(6) A ̊ , V = 939.63(8) A ̊ 3 and Z = 4 . Least squares refinement of the model based on 873 reflections converged to a final ωR 2 = 0.1124.
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