Journal article
1,3-Diphospha-2-silaallylic Lithium Complexes and Anions: Synthesis, Crystal Structures, Reactivity, and Bonding Properties.



Publication Details
Authors:
Lange, D.; Klein, E.; Bender, H.; Niecke, E.; Nieger, M.; Pietschnig, R.; Schoeller, W.; Ranaivonjatovo, H.
Publisher:
American Chemical SocietyDO - 10.1021/OM9707937
Publication year:
1998
Journal:
Organometallics
Pages range:
2425-2432
Volume number:
17
Start page:
2425
End page:
2432
ISSN:
0276-7333

Abstract
Trichlorosilanes RSiCl3 (R = t-Bu, Mes, Cp*, Is, OAr) reacted with a 4-fold excess of lithium phosphanide ArPHLi (Ar = 2,4,6-tBu3C6H2) to form 1,3-diphospha-2-silaallylic complexes. From the latter, the corresponding free allylic anions could be liberated by complexation of the lithium cation with [15]-crown-[5], as could be established on the basis of NMR spectra and x-ray structures. In addn., the bonding in the Li complexes was further investigated using ab initio calcns. of double-ξ quality. The influence of cation solvation on the complex geometry was explored as well. The chem. reactivity of 1,3-diphospha-2-silaallylic anions with electrophiles (E = H+, ClPR'R'') was investigated. 1,3-Diphospha-2-silapropenes and 1,3,4-triphospha-2-silabutenes-(1) were prepd. [on SciFinder(R)]


Keywords
crystal mol structure diphosphasilaallylic lithium anion, diphosphasilaallylic lithium anion prepn reactivity bonding, diphosphasilapropene triphosphasilabutene prepn, phosphasilaallylic lithium anion prepn reactivity bonding


Authors/Editors

Last updated on 2019-25-07 at 16:02

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