
TY  - JOUR
A1  - Dickson, RS 
A1  - Tailby, GR 
T1  - Transition metal complexes of substituted alkynes. VII. Some cyclopentadienone complexes of cobalt and rhodium
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1970
VL  - 23
IS  - 8
SP  - 1531
EP  - 1544
KW  - 
UR  - https://doi.org/10.1071/CH9701531 
N2  - &#960;-Cyclopentadienone-&#960;-cyclopentadienyloobalt complexes have been prepared from reactions of &#960;-oyclopentadienyldicarbonylcobalt and the alkynes bis(pentafluorophenyl)acetylene and 2,3,4,5,6-pentafluorodiphenylacetylene. Spectroscopic data indicate that the complex derived from the latter alkyne has an unsymmetrical arrangement of the substituents in the cyclopentadienone ring. It is formulated as 2,4-bis(pentafluorophenyl)-3,5-diphenylcyclopentadienone-&#960;-cyclopentadienyl-cobalt. A related cyclopentadienone complex, &#960;-tetrakis(pentafluorophenyl)cyclopenta-dienone-&#960;-cyclopentadienylrhodium has been prepared from &#960;-cyclopentadienyl-dicarbonylrhodium and bis(pentafluorophenyl)acetylene. Similar organorhodium complexes could not be isolated from reactions of &#960;-C5H5Rh(CO)2 with diphenylacetylene and 2,3,4,5,6-pentafluorodiphenylacetylene. These compounds could, however, be prepared indirectly by the in situ treatment with thallous cyclopentadienide of the cyclopentadienone complexes formed in reactions of [Rh(CO)2Cl]2 with RC=CR' (R = phenyl, R' = phenyl or pentafluorophenyl). Like its cobalt analogue, &#960;-bis(pentafluorophenyl)diphenylcyclopentadienone-.&#960;-cyclopentadienyl- rhodium has an unsymmetrical arrangement of the substituents in the ring. 
ER  -

