The formation of organorhodium complexes from the reaction of hexafluorobut- 2-yne and (π-C5H5)Rh(CO)2

Abstract

The thermally initiated reaction of hexafluorobut-2-yne with (π-C5H5)Rh(CO)2 has been studied in detail, and it is found that the nature and yields of the products are sensitive to the reaction conditions. The known complexes (π-C5H5)Rh-[(C4F6)2CO] and (π-C5H5)Rh(C4F6)3 and the new organorhodium complexes (π-C5H5)2Rh2(CO)2(C4F6), (.π-C5Hs)3Rh3(C4F6)2, (π-C5H5)2Rh2(CO)(C4F6)2, and (π-C5H5)3Rh3(CO)(C4F6) have been isolated from the reaction system. Each organorhodium complex has been characterized by elementary and mass spectral analysis, and reasonable structures for all complexes have been predicted from the appropriate i.r. and N.M.R. data. The monoalkyne complex (π-C5H5)2Rh2(CO)2(C4F6) is an intermediate in the formation of the other organorhodium complexes.