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Bridging μ‐η 5 :η 4 ‐Coordination of an Indenyl Ligand and Reductive Coupling of Diazabutadienes in the Assembly of Di‐ and Tetranuclear Mixed‐Valent Ytterbium Indenyldiazabutadiene Complexes
Author(s) -
Trifonov Alexander A.,
Fedorova Elena A.,
Fukin Georgy K.,
Baranov Evgenii V.,
Druzhkov Nikolai O.,
Bochkarev Mikhail N.
Publication year - 2006
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200501181
Subject(s) - ytterbium , bridging (networking) , bridging ligand , crystallography , chemistry , ligand (biochemistry) , coupling (piping) , materials science , physics , crystal structure , laser , optics , computer science , biochemistry , receptor , computer network , metallurgy
Abstract The redox reaction of [Yb(C 9 H 7 ) 2 (thf) 2 ] with the diazabutadiene PhNC(Me)C(Me)NPh (DAD) has been found to depend on the molar ratio of the reactants. Reaction in a 1:2 molar ratio affords the dinuclear mixed‐valent complex [Yb 2 (μ‐η 5 :η 4 ‐C 9 H 7 )(η 5 ‐C 9 H 7 ) 2 {μ‐η 4 :η 4 ‐PhNC(Me)C(Me)NPh}] containing an indenyl ligand with an unusual μ‐η 5 :η 4 bridging coordination. Reaction of equimolar amounts of these compounds results in an organolanthanide‐mediated reductive coupling of the DAD ligands and formation of the tetranuclear mixed‐valent complex [Yb 2 (μ‐η 5 :η 4 ‐C 9 H 7 )(η 5 ‐C 9 H 7 ) 2 {μ‐η 4 :η 4 ‐PhNC(CH 2 )C(Me)NPh}] 2 with a novel tetradentate tetraimine ligand.