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Synthesis and Structural Characterization of Rare Earth Metal Disulfonamide Complexes ☆
Author(s) -
Görlitzer Hans W.,
Spiegler Michael,
Anwander Reiner
Publication year - 1998
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/(sici)1099-0682(199807)1998:7<1009::aid-ejic1009>3.0.co;2-b
Subject(s) - chemistry , yttrium , toluene , monomer , ligand (biochemistry) , rare earth , derivative (finance) , cyclohexane , metal , solvent , molecule , bridging ligand , stereochemistry , medicinal chemistry , crystallography , organic chemistry , polymer , oxide , biochemistry , mineralogy , receptor , financial economics , economics
The reaction of rare earth silylamides Ln[N(SiHMe 2 ) 2 ] 3 (thf) n [ n = 1 for Sc ( 1a ); n = 2 for Y ( 1b ), La ( 1c ), Nd ( 1d )] with trans ‐1,2‐bis(2,4,6‐triisopropylbenzenesulfonamido)cyclohexane (H 2 L, rac ‐ 2 ) in toluene at ambient temperature proceeds via an extended silylamide route, affording highly soluble complexes Sc(L)[N(SiHMe 2 ) 2 ] ( 3 ) and Ln(L)[N(SiHMe 2 ) 2 ](thf) ( 4a–c ) in excellent yields. An X‐ray crystallographic study performed on the solvent‐free, dinuclear yttrium derivative 5 revealed an unusual μ 2 ,η 4 :η 1 ‐coordination of the disulfonamide ligand, involving bridging S=O groups. In solution, equilibria between dimeric and monomeric forms, dependent on the presence of a donor molecule, were observed by NMR techniques.