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Reversible Sn–Sn Triple Bond Dissociation in a Distannyne: Support for Charge-Shift Bonding Character

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journal contribution
posted on 2019-07-30, 18:39 authored by Ting Yi Lai, Lizhi Tao, R. David Britt, Philip P. Power
The tin–tin triple bond in the distannyne AriPr4SnSnAriPr4, AriPr4 = C6H3-2,6­(C6H3-2,6-iPr2)2, undergoes reversible cleavage in deuterated toluene to afford two :SṅAriPr4 radicals in solution as shown by 1H nuclear magnetic resonance and electron paramagnetic resonance spectroscopy. Variable temperature data afforded an enthalpy of dissociation of ΔHdiss = 17.2 ± 1.7 kcal mol–1 via van‘t Hoff analysis.