1,1′-Dibromo-2,2′,5,5′-tetrakis(methylthio)ferrocene

Abstract

The reaction of 1,1′-dibromoferrocene with three equivalents of LiTMP and Me2S2 produces a product mixture, from which 1,1′-dibromo-2,2′-bis(methylthio)ferrocene (4) can be isolated in moderate yield. Further treatment of the isolated compound 4 with two equivalents of LiTMP and Me2S2 also produced a mixture, from which the title compound 7 could be isolated. A crystal structure determination of 7 shows that the two cyclopentadienyl rings are oriented in such a way that a maximum number of S…Br contacts results. Intermolecular S…Br contacts, supported by S…S contacts, lead to a 1D-chain polymer in [1 0 0] direction.

Keywords

• bromoferrocenes
• ferrocenyl thioethers
• halogen dance reaction
• crystal structure
• hirshfeld analysis