triethyl amine in tetrahydrofuran anhydrous condition, (H3CO)C6H2(CHO)(OH)NN(C6H4Cl) added to Cp2TiCl2 in dry THF, Et3N added, reflux, 10-12 h, filtration to remove Et3N*HCl, volume reduced (reduced pressure, 25°C), dry n-hexane added; dried (vacuum); elem. anal.;