Binuclear magnesium, calcium, and zinc complexes based on nitrogen-nitrogen-coupled salicylaldiminate and ß-diketiminate ligands
Piesik DFJ, Stadler R, Range S, Harder S (2009)
Publication Type: Journal article, Original article
Publication year: 2009
Journal
Original Authors: Piesik D.F.J., Stadler R., Range S., Harder S.
Publisher: Wiley-VCH Verlag
Pages Range: 3569-3576
Journal Issue: 24
Abstract
The diprotic bis(salicylaldimine) ligand N,N′-bis(3,5-di- tBusalicylidene)diimine, (1-NN)H, was smoothly deprotonated by reaction with two equivalents of a metal amide M[N(SiMe) ]2 (M = Mg, Ca or Zn) to form a bimetallic metal amide complex (1-NN)[MN(SiMeJ]J. This heteroleptic complex was only stable in the case of Mg and (1-NN)[MgN(SiMe)· thf] was structurally characterized by X-ray diffraction. For Ca and Zn homoleptic products could be obtained: (1-NN)Ca·(thf) and (1-NN)Zn. The latter crystallized as a trimer with approximate C -symmetry. The diprotic N-N coupled bis(β-diketimine) ligand [RHNC(Me)=C-C(Me)=N-N=C(Me)-C=C(Me)-NHR, R = 2,6-diiPr-CH ], which is abbreviated as (2-NN)H, can be deprotonated only under much harsher reaction conditions. Attempted synthesis of (2-NN)[Mg(nBu)] gave after ligand exchange the homoleptic species (2-NN)Mg and Mg(nBu), For Ca, the complexes [(2-NN)Ca] and (2-NN)[CaN(SiMe3)2· thf] both have been prepared and structurally characterized by X-ray diffraction. The latter heteroleptic complex is in benzene solution in equilibrium with [(2-NN)Ca] and Ca[N- (SiMe)]·(thf). Reaction of (2-NN)H with excess of EtZn gave the heteroleptic complex (2-NN)[ZnEt] and is stable towards ligand exchange reactions. The complex is not active in CO2/cyclohexene oxide copolymerization. © Wiley-VCH Verlag GmbH & Co. KGaA.
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APA:
Piesik, D.F.-J., Stadler, R., Range, S., & Harder, S. (2009). Binuclear magnesium, calcium, and zinc complexes based on nitrogen-nitrogen-coupled salicylaldiminate and ß-diketiminate ligands. European Journal of Inorganic Chemistry, 24, 3569-3576. https://doi.org/10.1002/ejic.200900435
MLA:
Piesik, Dirk F. -J., et al. "Binuclear magnesium, calcium, and zinc complexes based on nitrogen-nitrogen-coupled salicylaldiminate and ß-diketiminate ligands." European Journal of Inorganic Chemistry 24 (2009): 3569-3576.
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