BIS(CYCLOPENTADIENYL)TITANIUM ZIRCONIUM(IV) DERIVATIVES WITH SCHIFF-BASES DERIVED FROM 1,4-DIHYDRAZINOPHTHALAZINE/

Bis(cyclopentadienyl)titanium(IV)/zirconium(IV) comolexes, [(Cp(2)MCl) (2)L]Cl-2 and [(Cp(2)M)(2)L']Cl-2 (where M = Ti or zr: L = Schiff base s derived from 1,4-dihydrazinophthalazine and benzaldehyde, 4-methoxyb enzaldehyde, 2-chlorobenzaldehyde or acetophenone; L'H-2 = Schiff base s derived from 1,4-dihydrazinophthalazine and salicylaldehyde or ($) u nder bar o-hydroxyacetophenone) have been synthesized. All derivatives were characterized by elemental analyses, electrical conductance, mag netic moment and spectral (electronic, IRI H-1 NMR) data. H-1 NMR spec tra of these complexes indicate that there is rapid rotation of the cy clopentadienyl ring about the metal ring axis. The probable structures of the complexes are proposed.