Cycloocta-1,5-diynes

The through-bond conjugation with strong ct-tt mixing for tetrasila-cycloocta-l,5-diyne is further demonstrated by photoelectron spectroscopic (15) and ab initio (3-21G basis set) studies (16). 

Coupling reactions. The hexacarbonyldicobalt complexes of cycloocta-l,5-diynes and cyclooct-3-ene-l,5-diynes have been acquired by reductive cyclization of the dication... 

Octa-l,7-diene-3,5-diyne hydrogenated with Lindlar catalyst in n-hexane containing quinoline at 24-25° and slightly more than atmospheric Hg-pressure cycloocta-l,3,5-triene. Y 80%. W. Ziegenbein, B. 98, 1427 (1965). 

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