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Die Tris(triisopropylsilyl)pnikogene: Synthese und Charakterisierung von [E(Si i Pr 3 ) 3 ] (E = P, As, Sb)
Author(s) -
Hänisch Carsten von
Publication year - 2001
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/1521-3749(200107)627:7<1414::aid-zaac1414>3.0.co;2-f
Subject(s) - chemistry , crystallography , crystal structure , tris , covalent bond , coordination number , stereochemistry , ion , organic chemistry , biochemistry
The Tris(triisopropylsilyl)pnikogenes: Synthesis and Characterisation of [E(Si i Pr 3 ) 3 ] (E = P, As, Sb) The compounds [E(Si i Pr 3 ) 3 ] (E = P, As, Sb) ( 1 – 3 ) were prepared in high yields by the reaction of (Na/K) 3 E with i Pr 3 SiCl in DME. They were characterised by 1 H‐, 13 C‐, 29 Si‐ and 31 P‐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 P a 3, the lattice constants are: 1 : a = 1860.1(2) pm, 2 : a = 1873.6(2) pm, 3 : a = 1897.1(2) pm.