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Reactivity of mercury(II) halides with the unsymmetrical phosphorus ylide Ph<sub>2</sub>PCH<sub>2</sub>CH<sub>2</sub>PPh<sub>2</sub>=C(H)C(O)Ph: Crystal structure of {HgI<sub>2</sub> [</i>P</i>Ph<sub>2</sub>CH<sub>2</sub>CH<sub>2</sub>PPh<sub>2</sub>=C(H)C(O)Ph]}<i><sub>n</sub></i>
Auteur(s)
Date de parution
2007
In
Polyhedron, Elsevier, 2007/26/14/3491-3495
Résumé
The unsymmetrical phosphorus ylide, Ph<sub>2</sub>PCH<sub>2</sub>CH<sub>2</sub>PPh<sub>2</sub>=C(H)C(O)Ph is shown to react with Hg(II) halides to form polymeric products with the composition {HgX<sub>2</sub> [PPh<sub>2</sub>CH<sub>2</sub>CH<sub>2</sub>PPh<sub>2</sub>C(H)C(O)Ph]}<i><sub>n</sub></i>, where X = Cl (<b>1</b>), Br (<b>2</b>), I (<b>3</b>). The complexes have been characterized by elemental analysis, IR, <sup>1</sup>H, <sup>31</sup>P NMR spectra as well as by ESI mass spectra. In product <b>1</b> the ylide exhibits a P, C-bridging mode of coordination, while in <b>2</b> and <b>3</b> it shows a monodentate P-coordination with the dangling ylide. The structure of complex <b>3</b> has been characterized crystallographically. The monomeric –Hg–I–Hg– bridging in <b>3</b> leads to a zig-zag polymeric chain in which mercury assumes a distorted tetrahedral geometry.
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Type de publication
journal article
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