Diferrocenyl lithium

Ferrocenyl organo tellurium derivatives were prepared from diferrocenyl ditellurium and organic lithium compounds with toluene or tetrahydrofuran as the solvent2. 

Diferrocenyl Tellurium2 A solution of 0.10 g (0.52 mmol) ferrocenyl lithium in 25 ml tetrahydrofuran is mixed with 0.16 g (0.26 mmol) of diferrocenyl ditellurium. The mixture is stirred at 20° for 1 h. The solvent is evaporated and the residue is dissolved in a small volume of dichloromethane. The solution is chromatographed on a silica gel column. Ferrocene and bifcrroccnc arc washed from the column with pentane. Diferrocenyl tellurium and diferrocenyl tellurium are eluted with dichloromethane. The diferrocenyl tellurium compounds are separated on 0.5 mm silica gel layers with pentane/toluene (7 1) as the mobile phase. The orange crystals melt at 164-166° yield 9%. 

Neither diferrocenyl ether ( Fc-O-Fc ) nor diferrocenyl peroxide ( Fc-OO-Fc ) are known so far. However, the corresponding compounds of sulfur, selenium and tellurium are well characterized (see Sect. 5.8). The dichalcogenides Fc-EE-Fc (E = S, Se, Te) are easily obtained by oxidative dimerisation of either the lithium ferrocenyl chalcogenate, Fc-ELi, or the chalcogenols, Fc-EH, for which they can be used as stable precursors (Sect. 5.3.3) [91, 95]. Reaction of the dichalcogenides Fc-EE-Fc with Fc-Li is a possible route to the monochalcogenides, Fc-E-Fc, but the yields are... 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

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