Reaktion #710049

Reaktionsgleichung

Chlorotrimethylsilane

Sodium cyclopentadienide

→

bis(trimethylsilyl)cyclopentadiene

trimethylsilylcyclopentadiene

Lösungsmittel

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONThe reaction mixture is poured into 150 ml of cold,
2. 2
   workup.DISTILLATIONdistilled water and trimethylsilylcyclopentadiene
3. 3
   Extraktionis extracted into diethyl ether
4. 4
   SonstigeThe extract is rotary evaporated
5. 5
   Sonstigeto remove the ethereal solvent
6. 6
   workup.DISTILLATIONdistilled

Vorschrift

Trimethylsilylcyclopentadiene and bis(trimethylsilyl)cyclopentadiene are prepared by the procedures of Kraihanzel et al., J. Amer. Chem. Soc., 90, 4701 (1968) and I. M. Pribytkova et al., J. of Organometallic Chem., 30, C57-C60 (1971). Sodium cyclopentadienide (44 g, 0.50 mole) is added to 150 ml of tetrahydrofuran. Chlorotrimethylsilane (54 g, 0.5 mole) is added dropwise slowly to the reaction and the stirring is continued for 3 hours. The reaction mixture is poured into 150 ml of cold, distilled water and trimethylsilylcyclopentadiene is extracted into diethyl ether. The extract is rotary evaporated to remove the ethereal solvent and the residue is vacuum distilled to give trimethylsilylcyclopentadiene, b.p. 41° C.-43° C. (16 mm).

Quelle