1-cyclopenta-2,4-dien-1-ylidene-N,N-dimethylmethanamine

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The cyclopentadienyl-type ligand, (fluorenyl)(cyclopentadienyl)(methyl)methane was prepared as follows. A solution of 5.0 g fluorene (0.030 mole) was treated with 0.030 mole n-butylithium in 200 mL THF and stirred for two hours at room temperature. Then 0.030 mole 6-(dimethyl)aminofulvene was added and the mixture was stirred for five hours. The deep red solution was then reacted with 0.060 mole methyllithium and the mixture was refluxed for 8 to 10 hours to form a dianion. The reaction product was hydrolysed very slowly with cooling. The reaction vessel was cooled in a dry ice bath and the reaction mixture was hydrolysed by very slow dropping of a solution of aqueous HCl in THF. The thus produced CHMe-bridged ligand was extracted with pentane, dried over sodium sulfate, and the solvent was evaporated. the mixture was stirred for five hours the mixture was refluxed for 8 to 10 hours to form a dianion with cooling The reaction vessel was cooled in a dry ice bath The thus produced CHMe-bridged ligand was extracted with pentane dried over sodium sulfate the solvent was evaporated

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A second batch of the cyclopentadienyl-type ligand, (fluorenyl)(cyclopentadienyl)methane was prepared as follows. A solution of 13.7 g (0.0824 moles) fluorene in 200 mL tetrahydrofuran (THF) was treated with (0.0826 moles) n-butyllithium at room temperature. After 14.5 hours, 10.00 g (0.0825 moles) solid 6-(dimethylamino)fulvene were added to the orange-brown solution and the mixture was stirred at room temperature for 8.5 hours. The mixture was then reacted with 6.50 g (0.171 moles) LiAlH4 and refluxed 15.5 hours. Then 0.0032 moles n-butyllithium was added and the mixture was stirred for 10 minutes. The mixture was hydrolysed with 500 g ice, 500 mL ether and 200 mL concentrated HCl. The aqueous phase was extracted 3 times with 300 mL ether. The ether extracts were combined and the ether evaporated. The solid residue was mixed with pentane and filtered over silica. The yield was 5.7 g (fluorenyl)(cyclopentadienyl)methane having a gas chromatographic purity of 98%. refluxed 15.5 hours the mixture was stirred for 10 minutes The aqueous phase was extracted 3 times with 300 mL ether the ether evaporated The solid residue was mixed with pentane filtered over silica

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The cyclopentadienyl-type ligand, (fluorenyl)(cyclopentadienyl)methane was prepared as follows. A solution of 13.72 g (0.08252 mol) fluorene in 150 mL tetrahydrofuran (THF) was treated with 51.6 mL (0.08252 moles) 1.6M n-butyllithium solution at room temperature. The mixture was stirred at room temperature for 6 hours and then 10.00 g (0.0825 moles) 6-(dimethylamino)fulvene suspended in 50 mL THF were added and this mixture was stirred for 16 hours. The mixture was then reacted with 6.27 g (0.1652 mol) LiAlH4 and refluxed 5.5 hours. The product was carefully hydrolysed with ice water, 500 mL ether, and HCl. Then the clear phase was separated and was extracted with ether, dried over sodium sulfate, and the solvent was evaporated at 15° C. The solid crude product was mixed with pentane, filtered over silica gel, concentrated in vacuo, and cooled to -10° C. to -25° C. to produce light yellow crystals. After a second recrystallization from pentane, the yield was 5.27 g (fluorenyl)(cyclopentadienyl)methane, or 88 percent. Gas chromatography (GC) analysis indicated 97 percent purity. were added this mixture was stirred for 16 hours refluxed 5.5 hours Then the clear phase was separated was extracted with ether dried over sodium sulfate the solvent was evaporated at 15° C The solid crude product was mixed with pentane filtered over silica gel concentrated in vacuo cooled to -10° C. to -25° C. to produce light yellow crystals After a second recrystallization from pentane

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The cyclopentadienyl-type ligand, (fluorenyl)(cyclopentadienyl)(methyl)methane was prepared as follows. A solution of 5.0 g fluorene (0.030 mole) was treated with 0.030 mole n-butylithium in 200 mL THF and stirred for two hours at room temperature. Then 0.030 mole 6-(dimethyl)aminofulvene was added and the mixture was stirred for five hours. The deep red solution was then reacted with 0.060 mole methyllithium and the mixture was refluxed for 8 to 10 hours to form a dianion. The reaction product was hydrolysed very slowly with cooling. The reaction vessel was cooled in a dry ice bath and the reaction mixture was hydrolysed by very slow dropping of a solution of aqueous HCl in THF. The thus produced CHMe-bridged ligand was extracted with pentane, dried over sodium sulfate, and the solvent was evaporated. the mixture was stirred for five hours the mixture was refluxed for 8 to 10 hours to form a dianion with cooling The reaction vessel was cooled in a dry ice bath The thus produced CHMe-bridged ligand was extracted with pentane dried over sodium sulfate the solvent was evaporated

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A second batch of the cyclopentadienyl-type ligand, (fluorenyl)(cyclopentadienyl)methane was prepared as follows. A solution of 13.7 g (0.0824 moles) fluorene in 200 mL tetrahydrofuran (THF) was treated with (0.0826 moles) n-butyllithium at room temperature. After 14.5 hours, 10.00 g (0.0825 moles) solid 6-(dimethylamino)fulvene were added to the orange-brown solution and the mixture was stirred at room temperature for 8.5 hours. The mixture was then reacted with 6.50 g (0.171 moles) LiAlH4 and refluxed 15.5 hours. Then 0.0032 moles n-butyllithium was added and the mixture was stirred for 10 minutes. The mixture was hydrolysed with 500 g ice, 500 mL ether and 200 mL concentrated HCl. The aqueous phase was extracted 3 times with 300 mL ether. The ether extracts were combined and the ether evaporated. The solid residue was mixed with pentane and filtered over silica. The yield was 5.7 g (fluorenyl)(cyclopentadienyl)methane having a gas chromatographic purity of 98%. refluxed 15.5 hours the mixture was stirred for 10 minutes The aqueous phase was extracted 3 times with 300 mL ether the ether evaporated The solid residue was mixed with pentane filtered over silica

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The cyclopentadienyl-type ligand, (fluorenyl)(cyclopentadienyl)methane was prepared as follows. A solution of 13.72 g (0.08252 mol) fluorene in 150 mL tetrahydrofuran (THF) was treated with 51.6 mL (0.08252 moles) 1.6M n-butyllithium solution at room temperature. The mixture was stirred at room temperature for 6 hours and then 10.00 g (0.0825 moles) 6-(dimethylamino)fulvene suspended in 50 mL THF were added and this mixture was stirred for 16 hours. The mixture was then reacted with 6.27 g (0.1652 mol) LiAlH4 and refluxed 5.5 hours. The product was carefully hydrolysed with ice water, 500 mL ether, and HCl. Then the clear phase was separated and was extracted with ether, dried over sodium sulfate, and the solvent was evaporated at 15° C. The solid crude product was mixed with pentane, filtered over silica gel, concentrated in vacuo, and cooled to -10° C. to -25° C. to produce light yellow crystals. After a second recrystallization from pentane, the yield was 5.27 g (fluorenyl)(cyclopentadienyl)methane, or 88 percent. Gas chromatography (GC) analysis indicated 97 percent purity. were added this mixture was stirred for 16 hours refluxed 5.5 hours Then the clear phase was separated was extracted with ether dried over sodium sulfate the solvent was evaporated at 15° C The solid crude product was mixed with pentane filtered over silica gel concentrated in vacuo cooled to -10° C. to -25° C. to produce light yellow crystals After a second recrystallization from pentane

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The cyclopentadienyl-type ligand, (fluorenyl)(cyclopentadienyl)(methyl)methane was prepared as follows. A solution of 5.0 g fluorene (0.030 mole) was treated with 0.030 mole n-butylithium in 200 mL THF and stirred for two hours at room temperature. Then 0.030 mole 6-(dimethyl)aminofulvene was added and the mixture was stirred for five hours. The deep red solution was then reacted with 0.060 mole methyllithium and the mixture was refluxed for 8 to 10 hours to form a dianion. The reaction product was hydrolysed very slowly with cooling. The reaction vessel was cooled in a dry ice bath and the reaction mixture was hydrolysed by very slow dropping of a solution of aqueous HCl in THF. The thus produced CHMe-bridged ligand was extracted with pentane, dried over sodium sulfate, and the solvent was evaporated. the mixture was stirred for five hours the mixture was refluxed for 8 to 10 hours to form a dianion with cooling The reaction vessel was cooled in a dry ice bath The thus produced CHMe-bridged ligand was extracted with pentane dried over sodium sulfate the solvent was evaporated

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A second batch of the cyclopentadienyl-type ligand, (fluorenyl)(cyclopentadienyl)methane was prepared as follows. A solution of 13.7 g (0.0824 moles) fluorene in 200 mL tetrahydrofuran (THF) was treated with (0.0826 moles) n-butyllithium at room temperature. After 14.5 hours, 10.00 g (0.0825 moles) solid 6-(dimethylamino)fulvene were added to the orange-brown solution and the mixture was stirred at room temperature for 8.5 hours. The mixture was then reacted with 6.50 g (0.171 moles) LiAlH4 and refluxed 15.5 hours. Then 0.0032 moles n-butyllithium was added and the mixture was stirred for 10 minutes. The mixture was hydrolysed with 500 g ice, 500 mL ether and 200 mL concentrated HCl. The aqueous phase was extracted 3 times with 300 mL ether. The ether extracts were combined and the ether evaporated. The solid residue was mixed with pentane and filtered over silica. The yield was 5.7 g (fluorenyl)(cyclopentadienyl)methane having a gas chromatographic purity of 98%. refluxed 15.5 hours the mixture was stirred for 10 minutes The aqueous phase was extracted 3 times with 300 mL ether the ether evaporated The solid residue was mixed with pentane filtered over silica

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The cyclopentadienyl-type ligand, (fluorenyl)(cyclopentadienyl)methane was prepared as follows. A solution of 13.72 g (0.08252 mol) fluorene in 150 mL tetrahydrofuran (THF) was treated with 51.6 mL (0.08252 moles) 1.6M n-butyllithium solution at room temperature. The mixture was stirred at room temperature for 6 hours and then 10.00 g (0.0825 moles) 6-(dimethylamino)fulvene suspended in 50 mL THF were added and this mixture was stirred for 16 hours. The mixture was then reacted with 6.27 g (0.1652 mol) LiAlH4 and refluxed 5.5 hours. The product was carefully hydrolysed with ice water, 500 mL ether, and HCl. Then the clear phase was separated and was extracted with ether, dried over sodium sulfate, and the solvent was evaporated at 15° C. The solid crude product was mixed with pentane, filtered over silica gel, concentrated in vacuo, and cooled to -10° C. to -25° C. to produce light yellow crystals. After a second recrystallization from pentane, the yield was 5.27 g (fluorenyl)(cyclopentadienyl)methane, or 88 percent. Gas chromatography (GC) analysis indicated 97 percent purity. were added this mixture was stirred for 16 hours refluxed 5.5 hours Then the clear phase was separated was extracted with ether dried over sodium sulfate the solvent was evaporated at 15° C The solid crude product was mixed with pentane filtered over silica gel concentrated in vacuo cooled to -10° C. to -25° C. to produce light yellow crystals After a second recrystallization from pentane