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Synthesis and Structural Characterization of Rare Earth Metal Disulfonamide Complexes☆

✍ Scribed by Hans W. Görlitzer; Michael Spiegler; Reiner Anwander

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
316 KB
Volume
1998
Category
Article
ISSN
1434-1948

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✦ Synopsis

The reaction of rare earth silylamides Ln[N(SiHMe 2 ) 2 ] 3 (thf) n performed on the solvent-free, dinuclear yttrium derivative 5 revealed an unusual µ 2 ,η 4 :η 1 -coordination of the [n = 1 for Sc (1a); n = 2 for Y (1b), La (1c), Nd (1d)] with trans-1,2-bis(2,4,6-triisopropylbenzenesulfonamido)cyclohexane disulfonamide ligand, involving bridging S=O groups. In solution, equilibria between dimeric and monomeric forms, (H 2 L, rac-2) in toluene at ambient temperature proceeds via an extended silylamide route, affording highly soluble dependent on the presence of a donor molecule, were observed by NMR techniques. complexes Sc(L)[N(SiHMe 2 ) 2 ] (3) and Ln(L)N(SiHMe 2 ) 2 (4a-c) in excellent yields. An X-ray crystallographic study

[ * ] The use of Ln[N(SiMe 3 ) 2 ] 3 as a synthetic precursor is hampered by partial product oligomerization.

tion, satisfying elemental analyses were obtained in most

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