Page 31 - Chemical and process design handbook
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Speight_Part 1_E&F  11/7/01  3:03 PM  Page 1.17









                                    ETHYNYLATION












                    The ethynylation reaction involves the addition of acetylene to carbonyl
                    compounds.
                                             1
                                                                    1
                                                  2
                                  HC≡CH + R COR → HC≡CC(OH)R R         2
                      Heavy metal acetylides, particularly cuprous acetylide (CuC≡CH), cat-
                    alyze the addition of acetylene (HC≡CH) to aldehydes (RCH=O).











































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