Question

write the mechanism of benzene condensation.
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Answer 1

The benzoin condensation is a condensation reaction between two aldehydes. The reaction generally occurs between aromatic aldehydes or glyoxals. The reaction produces an acyloin. In the classic application benzaldehyde is converted to benzoin.

The benzoin condensation was first reported in 1832 by Justus von Liebig and Friedrich Wöhler during their research on bitter almond oil. The catalytic version of the reaction involving cyanide was developed by Nikolay Zinin in the late 1830s.