REACTIONS OF ACETYLENES WITH NOBLE-METAL HALIDES .7. REACTIONS OF 3-HEXYNE AND DIPHENYLACETYLENE WITH CHLORODICARBONYLRHODIUM DIMER

At 80° diethylacetylene reacted with [Rh(CO)2Cl]2 (I) to give chloro(tetraethylcyclopentadienone)rhodium (III), duroquinone, and a novel blue complex [Rh2Cl2(CO)(EtC2Et)2]2 (IV). The structure and reactions of (IV) are discussed; with two moles of triphenylphosphine a bis-adduct (V) was obtained whereas an excess gave the Ph3P adduct of (III) among other products. At low temperatures diethylacetylene reacted with (I) to give a material (A) presumed to contain a diethylmaleoylrhodium moiety from its further reactions. Diphenylacetylene also gave a complex analogous to (IV). © 1969.