Group 4 zwitterionic metallocenes based upon the bridged amido-cyclopentadienyl ligand and coordinated dienes

Hair GS; Jones RA; Cowley AH; Lynch V

Inorganic Chemistry, Vol.40, No.5, 1014-1019, 2001

The reaction of (eta (5)-(C5Me4SiMe2NBu)-Bu-t)Zr(1,3-pentadiene) with B(C6F5)(3) results in the formation of the zirconium berate zwitterion complex (eta (5)-(C5Me4SiMe2NBu)-Bu-t)Zr(eta (3)-CH3(CH)(3)CH2B(C6F5)(3)) (1). Furthermore, reaction of (eta (5)-(C5Me4SiMe2NBu)-Bu-t)Ti(2,4-hexadiene), (eta (5)-(C5Me4SiMe2NBu)-Bu-t)Ti(2-methyl-1,3-butadiene), (eta (5)-(C5Me4SiMe2NBu)-Bu-t)-Ti(1,3-butadiene), and (eta (5)-(C5Me4SiMe2NBu)-Bu-t)Ti(2,3-dimethylbutadiene) with either B(C6F5)(3) or Al(C6F5)(3) results in the formation of (eta (5)-(C5Me4SiMe2NBu)-Bu-t)Ti(eta (3)-CH3CH2(CH)(3)CH2B(C6F5)(3)). (2), (eta (5)-(C5Me4SiMe2NBu)-Bu-t)Ti(eta (3)-CH2C(CH3)CHCH2Al(C6F5)(3)) (3), (eta (5)-(C5Me4SiMe2NBu)-Bu-t)Ti(eta (3)-CH2(CH)(2)CH2B(C6F5)(3)) (4), and (eta (5)-(C5Me4SiMe2NBu)-Bu-t)Ti(eta (3)-CH2C(CH3)C(CH3)CH2B(C6F5)(3)) (5). The X-ray crystal structures of 1-4 have been determined.