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Metallacyclodisiladiazanes of Titanium and zirconium; Synthesis, Structure and Polymerization Studies
Author(s) -
Jäger Felix,
Roesky Herbert W.,
Dora Hendrik,
Shak Syed,
Noltemeyer Mathias,
Schmidt HansGeory
Publication year - 1997
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19971300314
Subject(s) - chemistry , dimer , zirconium , polymerization , medicinal chemistry , ethylene , ligand (biochemistry) , olefin polymerization , fluorine , metallocene , solid state , stereochemistry , polymer chemistry , catalysis , inorganic chemistry , organic chemistry , polymer , biochemistry , receptor
A series of metallacyclodisiladiazanes has been prepared. Lithiated (SiMe 2 NH t Bu) 2 ( 1 ) reacts with TiCl 4 · 2 THF to give (SiMe 2 N t Bu) 2 TiCl ( 4 ). Methylation or fluorination of 4 leads to (SiMe 2 N t Bu) 2 TiMe 2 ( 8 ) and (SiMe 2 M t Bu) 2 TiF 2 ( 9 ), respectively. The reaction of ZrCl 4 · 2 THF with lithiated 1 or [SiMe 2 NH(4‐FC 6 J 4 )] 2 ( 2 ) yields (SiMe 2 N t Bu) 2 ZrCl 2 ( 5 ) and [SiMe 2 N(4‐FC 6 H 4 )]ZrCl 2 · THF ( 7 ), respectively. The lithiated ligand [SiMe 2 NH(2,6‐ i Pr 2 C 6 H 3 )] 2 ( 3 ) reacts with noncoordinated ZrCl 4 to give [SiMe 2 N(2,6‐ i Pr 2 C 6 H 3 )] 2 ZrCl 2 ( 6 ). X‐ray structural analysis of 9 showed it to be a fluorine‐bridged dimer in the solid state. Compounds 4, 6, 8 and 9 were found to be catalysts for the polymerization of ethylene.