TY - JOUR
T1 - Lithium aryloxo magnesiates
T2 - An examination of ligand size and donor effects
AU - Zuniga, Maria Felisa
AU - Kreutzer, Johannes
AU - Teng, Weijie
AU - Ruhlandt-Senge, Karin
PY - 2007/11/26
Y1 - 2007/11/26
N2 - 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.
AB - 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.
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U2 - 10.1021/ic701423r
DO - 10.1021/ic701423r
M3 - Article
C2 - 18020396
AN - SCOPUS:37249073828
SN - 0020-1669
VL - 46
SP - 10400
EP - 10409
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 24
ER -