Lithium aryloxo magnesiates: An examination of ligand size and donor effects

Maria Felisa Zuniga, Johannes Kreutzer, Weijie Teng, Karin Ruhlandt-Senge

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

The combination of equimolar amounts of LiOAr and Mg(OAr)2 (OAr = aryloxide) in polar media afforded several lithium aryloxomagnesiates. Factors influencing the structural chemistry of the compounds, such as the degree of ligand bulk, type of Lewis base donors, and crystallization solvent, are examined. Structural characterization reveals a discrete, solvent-separated species, [Li(thf)4][Mg(BHT)3]·THF (1) (BHT = 2,6-tBu2-4-MeC6H2O) and a family of molecular compounds with various Li/Mg stoichimetries, including a 1:1 Li/Mg ratio in [LiMg(Odpp)3(thf)2]·0.5PhMe (2) (Odpp = 2,6-Ph 2C6H3O) and [Li(Et2O)Mg(Odpp) 3]·0.5PhMe (3), a 2:1 Li/Mg ratio as in [{Li(thf) 2}2Mg(OMes)4]·2THF (4) (OMes = 2,4,6-Me3C6H2O) and [{Li(tmeda)} 2Mg(m-Odtp)4]·0.5Et2O (5) (m-Odtp = 3,5-tBu2C6H3O), and a novel 2:3 Li/Mg ratio in [{Li(thf)2}2Mg3(m-Odtp)8(thf) 2]·3THF (6). Two new homometallic magnesium bis(aryloxides), Mg(Odpp)2(thf)2 (7) and Mg(Odpp)2(Et 2O)2 (8), are also included for the sake of comparison. The solution behavior of the heterobimetallic compounds in arene and polar solvent is analyzed by 1H NMR spectroscopy.

Original languageEnglish (US)
Pages (from-to)10400-10409
Number of pages10
JournalInorganic Chemistry
Volume46
Issue number24
DOIs
StatePublished - Nov 26 2007

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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