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Triorganophosphine-dithiomonometaphosphoryl halides

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Rabis,  A.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Rabis, A., Ziemer, B., Wulff-Molder, D., Meisel, M., & Beck, S. (2002). Triorganophosphine-dithiomonometaphosphoryl halides. Acta Crystallographica Section C-Crystal Structure Communications, 58, O247-O250. doi:10.1107/S0108270102004080.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0015-316F-0
Abstract
The title compounds, ethyldiphenylphosphine- dithiomonometaphosphoryl chloride, EtPh2P --> PS2Cl, C14H15ClP2S2, (I), and tris-n-propylphosphine- dithiomonometaphosphoryl chloride and bromide, (Pr3P)-Pr-n --> PS2Cl, C9H21ClP2S2, (II), and nPr(3)P --> PS2Br, C9H21BrP2S2, (III), respectively, are the first phosphine-stabilized dithiomonometaphosphoryl halides to be structurally characterized. In the tris-n-propylphosphine derivatives, the central P --> P donor-acceptor bond becomes longer in the order bromo < chloro < fluoro. Substitution of the tris-n- propylphosphine group in (II) by the more bulky ethyldiphenylphosphine group also leads to a longer P --> P bond. These structural features agree with the observed 31 P NMR data. In (II) and (III), the central P-P bond coincides with the crystallographic threefold axis, entailing site- occupational disorder for the S2Y group.