US EPA

8411344 

Journal Article 

Organometallic chemistry of the transition metals XXI. Some π-pentamethylcyclopentadienyl derivatives of various transition metals 

King, RB; Bisnette, MB 

1967 

Yes 

Journal of Organometallic Chemistry
ISSN: 0022-328X
EISSN: 1872-8561 

8 

2 

287-297 

English 

10.1016/S0022-328X(00)91042-8 

Titanium tetrachloride reacts with lithium pentamethylcyclopentadienide in benzene solution to give red (CH3)5C5TiCl3 identical to the product previously obtained17 from titanium tetrachloride and butenes at elevated temperatures. Ferrous chloride reacts with lithium pentamethylcyclopentadienide in boiling tetrahydrofuran to give yellow [(CH3)5C5]2Fe (decamethylferrocene). Pentamethylcyclopentadiene reacts with pentacarbonyliron in boiling 2,2,5-trimethylhexane to give red-violet [(CH)35C5Fe(CO)2]2. Ultraviolet irradiation of pentamethylcyclopentadiene with CO2-(CO)8 in hexane solution gives deep red crystalline (CH3)5C5Co(CO)2. Lithium pentamethylcyclopentadiene reacts with Re(CO)5Cl to give white (CH3)5C5Re(CO)3. Lithium pentamethylcyclopentadiene reacts with hexacarbonylmolybdenum in boiling tetrahydrofuran to give the [C5(CH3)5Mo(CO)3]- anion identified by conversion to the orange methyl derivative CH3Mo(CO)3C5(CH3)5 with methyl iodide. However, pentamethylcyclopentadiene itself reacts with hexacarbonylmolybdenum to give red crystalline [(CH3)5C5Mo(CO)2]2. This latter complex is postulated to containe a novel type of molybdenum-molybdenum triple bond. © 1967.