Synthesis of a Mixed Phosphonium–Sulfonium Bisylide R3PCSR2 (pages 9078–9080)
Sergio Pascual, Matthew Asay, Ona Illa, Tsuyoshi Kato, Guy Bertrand, Nathalie Saffon-Merceron, Vicenç Branchadell and Antoine Baceiredo
Article first published online: 24 OCT 2007 | DOI: 10.1002/anie.200704071
Mixing it up: The first persistent mixed phosphorus-sulfur bisylide has been synthesized (see scheme). Its formation was clearly demonstrated by its chemical reactivity, such as by methylation and complexation with CuI ions. DFT calculations on a model compound indicate that they are highly polarized species as a result of the interaction of the lone pairs of electrons on the central carbon atom with only the phosphonium function.