We demonstrate the increased Lewis acidity on going from Sn(II) to Sn(IV) by oxidizing TpSnOTf (OTf = SOCF) to TpSnF(OTf). Replacement of the fluoride ion in TpSnF(OTf) by a triflate, resulting in TpSn(OTf) further enhances the Lewis acidity at tin. Sn NMR spectroscopy, modified Gutmann-Beckett test, computational analysis, and catalytic phosphine oxide deoxygenation support the claims.
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| http://dx.doi.org/10.1021/acs.inorgchem.3c01911 | DOI Listing |
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