Premium
Tripodal Amides Containing a Totally Silicon‐Based Ligand Framework
Author(s) -
Schubart Martin,
Findeis Bernd,
Gade Lutz H.,
Li WanSheung,
McPartlin Mary
Publication year - 1995
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.19951280403
Subject(s) - chemistry , ligand (biochemistry) , adamantane , amide , chlorosilane , stereochemistry , reagent , alkyl , aryl , zirconium , medicinal chemistry , crystallography , silicon , organic chemistry , biochemistry , receptor
A novel type of tripodal amido ligand with a totally siliconbased (trisilylsilane‐derived) ligand framework has been synthesized and coordinated to tetravalent titanium and zirconium. The key compound in the ligand synthesis is the chlorosilane H 3 CSi{Si(CH 3 ) 2 CI} 3 ( 2 ) which upon condensation with a range of primary amines R‐NH 2 (R = aryl, alkyl) yields the amino‐functionalized ligand precursors H 3 CSi{Si(CH 3 ) 2 NHR} 3 ( 3a–e ). Their corresponding trilithium salts have been found to be the appropriate amide transfer reagents in the subsequent syntheses of the transition metal complexes. Single‐crystal X‐ray structure analyses of the trilithium triamide H 3 CSi{Si(CH 3 ) 2 N(Li) t Bu} 3 ( 4a ) and the Ti complex H 3 CSi{Si(CH 3 ) 2 N( p ‐Tol)} 3 TiBr ( 5b ) have established their respective adamantane‐ and [2.2.2]bicyclooctane‐related cage structures.