Selective synthesis of conformationally restricted mono-cyclopentadienyl titanium(IV) complexes of p-tBu-calix[6]arene

Reaction of p-tBu-calix[6]arene with potassium metal in methanol followed by [TiCp2Cl2] affords novel mononuclear and binuclear monocyclopentadienyl titanium(IV) complexes, both having the same inverted double cone conformation with a Cp in one of the cavities, in both complexes.