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A Neutral Geminal Tin/Phosphorus Frustrated Lewis Pair
74
Citations
49
References
2019
Year
The geminal frustrated Lewis pair (FLP) (F<sub>5</sub> C<sub>2</sub> )<sub>3</sub> SnCH<sub>2</sub> P(tBu)<sub>2</sub> (2) was prepared by reacting (F<sub>5</sub> C<sub>2</sub> )<sub>3</sub> SnCl with LiCH<sub>2</sub> P(tBu)<sub>2</sub> . It is neutral and contains an extremely electronegatively substituted, but relatively soft (hard-soft acid-base, HSAB) acidic tin function. Its FLP-type reactivity was proven by reaction with a variety of small molecules (CO<sub>2</sub> , SO<sub>2</sub> , CS<sub>2</sub> , PhNCO, HCl, (Ph<sub>3</sub> P)AuCl). However, it shows no reaction in H/D scrambling experiments with H<sub>2</sub> /D<sub>2</sub> mixtures and binds CO<sub>2</sub> reversibly, as was observed by VT-NMR spectroscopy. Compound 2 and all its adducts were completely characterized by means of multinuclear NMR spectroscopy, elemental analysis, and X-ray diffraction experiments.
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