Triple-bonded tin in solution (green) breaks bonds to pick ethylene (solution turns yellow), violating organic chemistry rules. A slight change in pressure reverses the reaction (back to green).
Found in "The element tin does what carbon will not" online at: sciencenews.org/view/generic/id/47734/title/The_element_tin_does_what_carbon_will_not
Credit: Yang Peng
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