Early-transition-metal ketenimine complexes: Synthesis, reactivity, and structure of ketenimine-containing titanocene and zirconocene complexes

Content Provider	Semantic Scholar
Author	Fandos, Rosa Lanfranchi, Maurizio Otero, Antonio Pellinghelli, Maria Angela Ruiz, María José Teuben, Jan H.
Copyright Year	1997
Abstract	Reaction of Cp2M(PMe3)2 complexes (M = Ti, Zr; Cp = η5-C5H5) with the N-(p-tolyl)diphenylketenimine Ph‘NCCPh2 (Ph‘ = p-MeC6H4) in a 1:1 molar ratio affords the ketenimine-containing metallocene derivatives Cp2M(η2-(C,N)-Ph‘NCCPh2)(PMe3) (M = Ti (1); Zr (2)). The ketenimine ligand reacts in the same way with the “Cp*2M” species (Cp* = η5-C5Me5) generated from the reduction of the corresponding Cp*2MCl2 complexes with LitBu (1:2 molar ratio) to give the related complexes Cp*2M(η2-(C,N)-Ph‘NCCPh2) (M = Ti (3); Zr (4)). The molecular structure of 3 shows a titanium atom bonded to two η5-cyclopentadienyl rings and a η2 -(C,N)-bonded ketenimine ligand. Reaction of “Cp*2Ti” with the ketenimine ligand in a 1:2 molar ratio gives 1,1,5,5-tetraphenyl-3-(p-tolyl)-2-(p-toluidino)-3-aza-1,4-pentadiene, which probably results from the coupling, followed by hydrolysis, of two ketenimine molecules coordinated to one titanocene moiety. Protonation of 3 with Et3NHCl or H2O (1:1 molar ratio) affords the intermediate species ...
Starting Page	5283
Ending Page	5288
Page Count	6
File Format	PDF HTM / HTML
DOI	10.1021/om970568p
Alternate Webpage(s)	https://www.rug.nl/research/portal/files/6810998/1997OrganometallicsFandos.PDF
Alternate Webpage(s)	https://doi.org/10.1021/om970568p
Volume Number	16
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article