Cobalt complex pentamethylcyclopentadienyl

O2IOSC7HS, Osmium, dicarbonyI(Ti -cycIo-pentadienyI)iodo-, 25 191 02lOsC,2H,s, Osmium, dicarbonyliodo(Ti -pentamethylcyclopentadienyl)-, 25 191 O2NC2HS, Glycine cobalt complex, 25 135 02NC3Ht, Alanine cobalt complex, 25 137 02N4P2QH,2, 1 W,5W-[1, 4,2,3]Diazadiphos-phoIo[2,3-b][l,4,2,3]diazadiphosphoIe-2,6-(3W,7W)-dione, 1,3,5,7-tetrame-thyl-, 24 122... 

E. Pentamethylcyclopentadienyl Cobalt and Rhodium Complexes Derived from OFCOT... 

F. Reactions of Pentamethylcyclopentadienyl Cobalt and Rhodium Complexes of OFCOT with Exogenous Ligands... 

Half-sandwich complexes of cobalt with intramolecular phosphorous coordination have been known for the cobalt atoms in oxidation state - -l and - -ll (see Sections 7.01.3.3 and 7.01.3.4). Butenschon has published a comprehensive review recently on cyclopentadienyl metal complexes bearing pendant phosphorous arsenic and sulphur ligands. Intramolecular coordination to the cobalt center via a substituted Cp ring also oecurred in a rare reaction which combined C-H and C-F activation at the same time, thus leading to the coupling between a pentafluorophenyl ring and a pentamethylcyclopentadienyl ring (see Scheme 10 above). 

The groups of both Stephenson (1442) and Maitlis and co-workers (1443) independently prepared pentamethylcyclopentadienyl complexes [Cp M(S2CN- 2)2] (M = Rh, Ir R =Me, Et) upon addition of 2 equiv of dithiocarbamate salt to [Cp MCl(p-Cl)]2. Like the analogous cobalt cyclopentadienyl complexes, they contain both a monodentate and a bidentate dithiocarbamate [Cp Rh(S2CNMe2)2] (319) (Fig. 180) is characterized by the v(C—N) vibrations spectrum at 1392 and 1530 cm , respectively, in the IR spectrum. In solution, interconversion of the two dithiocarbamates occurs (Fig. 180). The NMR line shape analysis suggests that it occurs via a dissociatively controlled intramolecular mechanism. 

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