A one-step synthesis of protected functionalised titanocene dichlorides

We report a novel, high yield one-step synthesis of water stable and soluble titanocene dichloride dihydrochloride salts from the direct reaction of the neutral amino-substituted cyclopentadienes with TiCl4. The following novel complexes have been synthesised: C5H4(CH2)2N(CH2)5]2TiCl2 (5), [C5H4CH(CH2)4NMe]2TiCl2 (6), [C5H4(CH2)2N(CH2)5]2TiCl2·2HCl (7), [C5H4CH(CH2)4]2NMeTiCl2·2HCl (8), [C5H4(CH2)2N(CH2)5]2TiMe2 (9).