AI Article Synopsis
- Protonation of a bidentate xantphos-phosphole ligand with HBF(4) results in a single enantiomer of a cyclic phospholium dihydropholene structure.
- DFT (Density Functional Theory) calculations show that the protonation first occurs at the phosphorus atom of the phosphole part, producing a temporary P-H phospholium salt.
- This intermediate further protonates the C=C double bond in the second phosphole unit.
Article Abstract
Protonation of a bidentate xantphos-phosphole ligand by HBF(4) affords only one enantiomer of a cyclic phospholium dihydropholene structure. DFT calculations allowed us to establish that protonation initially takes place at the phosphorus atom of the phosphole moiety to afford a transient P-H phospholium salt, which in turn protonates the C=C double bond of the second phosphole unit.
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| http://dx.doi.org/10.1021/jo9014485 | DOI Listing |
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