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Organoelement Complexes of a Dinucleating Double β ‐Diiminato Ligand – Precedent Cases from Groups 1, 2, and 13
Author(s) -
Falkenhagen Jan P.,
Haack Peter,
Limberg Christian,
Braun Beatrice
Publication year - 2011
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201100352
Subject(s) - chemistry , ligand (biochemistry) , aryl , xanthene , medicinal chemistry , toluene , stereochemistry , rubidium , alkali metal , solid state , crystallography , organic chemistry , alkyl , potassium , receptor , biochemistry
Main group chemistry of dinucleating ligands based on a xanthene backbone and two parallel diiminato binding sites (Xanthdim) has been investigated. To complement studies concerning the coordination modes adopted by Xanthdim in combination with alkali metal ions a di‐rubidium complex with toluene co‐ligands has been prepared. Its structural parameters lie in between those previously observed for corresponding K + and Cs + complexes. Furthermore, the complexes [ Me 2 C 6 H 3Xanthdim](MgMe(thf)) 2 ( 2 ) and [ Me 2 C 6 H 3Xanthdim](MgBr(thf)) 2 ( 3 ) were synthesised by reaction of [ Me 2 C 6 H 3Xanthdim](K(thf) 2 ) 2 and [ Me 2 C 6 H 3Xanthdim]H 2 , respectively, with MeMgBr. Both compounds proved stable against ligand exchange according to the Schlenk equilibrium. After reaction of [ Me 2 C 6 H 3Xanthdim]H 2 and [ F 2 C 6 H 3Xanthdim]H 2 , respectively, with AlMe 3 the complexes [ Me 2 C 6 H 3Xanthdim](AlMe 2 ) 2 ( 4 ) and [ F 2 C 6 H 3Xanthdim](AlMe 2 ) 2 ( 5 ) were isolated and fully characterised. They were found to be dynamic in solution and Al–CH 3 ··· F‐aryl interactions were detected in case of 5 . The solid‐state structures and NMR spectroscopic properties of all compounds were determined and analysed.