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Monatshefte für Chemie / Chemical Monthly

, Volume 125, Issue 5, pp 579–586 | Cite as

[3]Ferrocenophanes with a tetramethyldisiloxane bridge: Synthesis and molecular structure

  • U. Siemeling
  • R. Krallmann
  • P. Jutzi
  • B. Neumann
  • H. -G. Stammler
Organische Chemie Und Biochemie

Summary

6,6,8,8-Tetramethyl-7-oxa-6,8-disila[3]ferrocenophane2 was obtained from the di(alkoxysilyl) ferrocene (H4C5SiMe2OR)2Fe (R=CH2CH2OCH2CH2OCH2CH2OMe) by hydrolysis and subsequent intramolecular disiloxane formation. 2,2′,3,3′,4,4′,5,5′,6,6,8,8-Dodecamethyl-7-oxa-6,8-disila-[3]ferrocenophane3 was formed by air oxidation of 2,2′3,3′,4,4′,5,5′,6,6,7,7-dodecamethyl-6,7-disila[2]ferrocenophane. The crystal structures of both compounds were determined by single-crystal X-ray diffraction (2:a=8.5330(10),b=15.610(3),c=18.774(5)Å, α=70.68(2), β=77.94(2), γ=75.150(10)°,V=2259.8(8)Å3,Z=6, space group P\(\bar 1\),R=0.045,R w =0.044;3:a=12.388(3),b=9.924(3),c=19.136(10)Å, β=105.11(3)°,V=2271.2(15)Å3,Z=4, space group P21/c,R=0.076,R w =0.060). Owing to the flexibility of the disiloxane bridge,2 and3 are unstrained molecules.

Keywords

Ferrocenophane Disiloxane unit 

[3]Ferrocenophane mit Tetramethyldisiloxan-Brücke: Synthese und Molekülstruktur

Zusammenfassung

6,6,8,8-Tetramethyl-7-oxa-6,8-disila[3]-ferrocenophan2 entsteht aus dem Di(alkoxysilyl)ferrocen (H4C5SiMe2OR)2Fe (R=CH2CH2OCH2CH2OCH2CH2OMe) durch Hydrolyse und anschließende intramolekulare Disiloxan-Bildung. 2,2′,3,3′,4,4′,5,5′,6,6,8,8-Dodecamethyl-7-oxa-6,8-disila[3]ferrocenophan3 wurde durch Luftoxidation von 2,2′,3,3′,4,4′,5,5′,6,6,7,7-Dodecamethyl-6,7-disila[2]ferrocenophan erhaeten. Die Kristallstrukturen beider Verbindungen wurden durch Einkristall-Röntgenstrukturanalyse bestimmt (2:a=8.5330(10),b=15.610(3),c=18.774(5)Å, α=70.68(2), β=77.94(2), γ=75.150(10)°,V=2259.8(8)Å3,Z=6, Raumgruppe P\(\bar 1\),R=0.045,R w =0.044;3:a=12.388(3),b=9.924(3),c=19.136(10)Å, β=105.11(3)°,V=2271.2(15)Å3,Z=4, Raumgruppe P21/c,R=0.076,R w =0.060). Wegen der Flexibilität der Disiloxan-Brücke sind2 und3 ungespannte Moleküle.

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References

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Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • U. Siemeling
    • 1
  • R. Krallmann
    • 1
  • P. Jutzi
    • 1
  • B. Neumann
    • 1
  • H. -G. Stammler
    • 1
  1. 1.Fakultät für ChemieUniversität BielefeldBielefeldGermany

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