Reactions between Nickel Carbonyl and Acetylenes which Yield Complexes

REACTION BETWEEN NICKEL CARBONYL AND ACETYLENES WHICH YIELD COMPLEXES 

Reactions between nickel carbonyl and acetylenes which afford isolable complexes are rare. Diphenylacetylene is exceptional in that it yields nearly 

In 1940 Reppe and Schweckendieck discovered that phosphine-substituted nickel carbonyl complexes could catalyze the cyclization of acetylenes (2, 65). This work has recently been extended by several groups of workers. An excellent review summarizing this topic has been written by Hiibel and Hoogzand (66), and this article is warmly recommended to the reader. To avoid duplication we will only summarize briefly the present state of this fleld. 

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