Halogen and Hydrogen Bonds in Co-crystalline Ferrocenium Organotellurium Halide Salts

Abstract

The reactions of ferrocene and decamethylferrocene with vinyltellurium trichloride Ph(Cl)C= C(Ph)TeCl₃ afford unusual co-crystalline salts [Cp₂Fe]⁺Cl^–Ph(Cl)C=C(Ph)TeCl₂OH (I) and [(C₅Me₅)₂Fe]⁺Cl^–(Ph(Cl)C=C(Ph)TeCl₂OH) (II). The Ph(Cl)C=C(Ph)TeCl₂OH molecule in these salts is neutral and forms only non-covalent (hydrogen and chalcogen) bonds with the chloride ion. The hydrolytic replacement of a chlorine atom not involved in the three-center four-electron Cl–Te–Cl bond in Ph(Cl)C=C(Ph)TeCl₃ is due to the general moisture sensitivity of organic telluriium halides, and the accompanying oxidation of ferrocene is not a necessary condition for the formation of Ph(Cl)C=C(Ph)TeCl₂OH (III). (CCDC nos. 1908530 (I), 1908531 (II), 1908532 (III).)