Tripodal Amides Containing a Totally Silicon-Based Ligand Framework
A novel type of tripodal amido ligand with a totally silicon-based (trisilylsilane-derived framework has been synthesized and coordinated to tetravalent titanium and zirconium.The key compound in the ligand synthesis is the chlorosilane H3CSi3 (2) which upon condensation with a range of primary amines R-NH2 (R = aryl, alkyl) yields the amino-functionalized ligand precursors H3CSi3 (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 H3CSi3 (4a) and the Ti complex H3CSi3TiBr (5b) have established their respective adamantane- and bicyclooctane-related cage structures. - Key Words: Trisilylsilanes/ Tripodal ligands/ Amido complexes
Schubart, Martin,Findeis, Bernd,Gade, Lutz H.,Li, Wan-Sheung,McPartlin, Mary
p. 329 - 334
(2007/10/02)
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