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Chloro‐ and Alkyltitanium Complexes of a New Dianionic Ancillary Ligand: A Linked Amidinate−Amide
Author(s) -
Meerendonk Wouter J. van,
Schröder Kai,
Brussee Edward A. C.,
Meetsma Auke,
Hessen Bart,
Teuben Jan H.
Publication year - 2003
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200390059
Subject(s) - chemistry , amide , cyclopentadienyl complex , medicinal chemistry , trimethylsilyl , sinc function , amine gas treating , ligand (biochemistry) , derivative (finance) , lithium (medication) , lithium amide , inorganic chemistry , polymer chemistry , catalysis , organic chemistry , computer science , computer vision , medicine , biochemistry , receptor , enantioselective synthesis , financial economics , economics , endocrinology
The lithium amidinate [Me 3 SiNC(Ph)N(CH 2 ) 3 N(Me)SiMe 3 ]Li(THF) ( 2 ), with a pendant methyl(trimethylsilyl)amine functionality, was prepared and found to react with [TiCl 4 (THF) 2 ] to give the titanium amidinate−amide dichloride complex [η 2 ,η 1 ‐Me 3 SiNC(Ph)N(CH 2 ) 3 NMe]TiCl 2 ( 3 ) by elimination of LiCl and Me 3 SiCl. The elimination of Me 3 SiCl from the cyclopentadienyl derivative Cp[η 2 ‐Me 3 SiNC(Ph)N(CH 2 ) 3 N(SiMe 3 )Me]TiCl 2 ( 5 ) to give Cp[η 2 ,η 1 ‐Me 3 SiNC(Ph)N(CH 2 ) 3 NMe]TiCl ( 4 ) is much less favorable, and was found to be readily reversible. Dialkyltitanium complexes [η 2 ,η 1 ‐Me 3 SiNC(Ph)N(CH 2 ) 3 NMe]Ti(CH 2 R) 2 [R = Ph ( 6 ), SiMe 3 ( 7 )] were prepared, but could not be activated for catalytic ethene polymerization. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)
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