A new synthetic method featuring using 5 - sulfosalicylic acid as catalyst
to prepare nine titanocene derivatives is reported. The title complexes wer
e characterized by elemental analysis, UV - vis, IR and H-1 NMR spectroscop
y. Based on the UV - vis spectrum, the mechanism of synthetic complexes is
proposed as follows: first, Cp2TiCl2 in the organic phase reacts interfacia
lly with 5 - sulfosalicylic acid in the aqueons phase to form an intermedia
te. The resulting species undergoes an interfacial interaction with substit
uted salicylic acid to form the final complexes, which stay in the organic
phase. Then the 'Cp2Ti' species return to the organic phase while 5 - sulfo
salicylic acid remains in the water phase.