Die Tris(triisopropylsilyl)pnikogene: Synthese und Charakterisierung von [E(SiiPr3)3] (E = P,As, Sb) |
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Authors: | Carsten von Hnisch |
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Abstract: | The Tris(triisopropylsilyl)pnikogenes: Synthesis and Characterisation of E(Si i Pr3)3] (E = P, As, Sb) The compounds E(SiiPr3)3] (E = P, As, Sb) ( 1 – 3 ) were prepared in high yields by the reaction of (Na/K)3E with iPr3SiCl in DME. They were characterised by 1H‐, 13C‐, 29Si‐ and 31P‐NMR spectroscopy, mass spectrometry and single crystal X‐ray diffraction. Compound 1 , recently obtained in a different way, shows an unusual trigonal planar coordination of the central phosphorus atom. However, 2 and 3 , featuring increasing covalence radii of the central atoms, show an increasingly pyramidal structure. 1 – 3 crystallise isotyp in the cubic spacegroup Pa 3, the lattice constants are: 1 : a = 1860.1(2) pm, 2 : a = 1873.6(2) pm, 3 : a = 1897.1(2) pm. |
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Keywords: | Phosphorus Arsenic Antimony Silicon Crystal structure |
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