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<p>These reactions are often reversible at high temperatures. In the case of <a href="page.php?w=furan">furan</a>-<a href="page.php?w=maleimide">maleimide</a> adducts, the retro-cycloaddition is accessible at temperatures as low as 40&nbsp;°C.</p>

<p><big> Metathesis </big></p>
<p><a href="page.php?w=Olefin_metathesis">Olefin</a> and <a href="page.php?w=alkyne_metathesis">alkyne metathesis</a> refers to a carbon-carbon bond forming reaction. In the case of olefin metathesis, the bond forms between two sp<sup>2</sup>-hybridized carbon centers. In alkyne</p><p>
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