The lithiation of arylamines and the preparation of cyclopentadienyltitanium(IV) arylaminate complexes

The 2-lithio-derivatives of a range of aryl-substituted amines were prepared, generally from the 2-bromo-compounds and butyllithium. These compounds cause dinitrogen uptake when mixed with [VCl2(Me2NCH2CH2NMe2)2] though no dinitrogen complexes were characterised. With [TiCpCl3] the lithio-derivatives form compounds [TiCpCl2(arylaminate)] the NMR spectra of which were studied in some detail. The X-ray structures of [{LiC6H4-2-CH2N(CH2CHCH2)2}4] and [TiCp(C6H4CH2R)Cl2] (R=NMe2, N(CH2CHCH2)2 or NC4H8O) are described.