Abstract:<p>Trapping experiments were claimed to demonstrate the first chemical synthesis of the free diatomic species C<sub>2</sub> at room temperatures, as generated by unimolecular fragmentation of an alkynyl iodonium salt precursor. Alternative mechanisms based on DFT energy calculations are reported here involving no free C<sub>2</sub>, but which are instead bimolecular 1,1- or 1,2-iodobenzene displacement reactions from the zwitterionic intermediate <b>11</b> by galvinoxy… Show more
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