TY - JOUR
T1 - Sodium and magnesium complexes with dianionic α-diimine ligands
AU - Liu, Yanyan
AU - Yang, Peiju
AU - Yu, Jie
AU - Yang, Xiao Juan
AU - Zhang, Jun D.
AU - Chen, Zhongfang
AU - Schaefer, Henry F.
AU - Wu, Biao
PY - 2008/11/24
Y1 - 2008/11/24
N2 - A series of sodium and magnesium complexes with α-diimine ligands, [Na2(LiPr)(Et2O)]2 (1, L iPr = [(2,6-iPr2C6H 3)N(Me)C]2), [Na2(LMes)(solv) 2]2 (LMes = [(2,4,6-Me3C 6H3)N(Me)C]2, 2a, solv = Et2O; 2b, solv = THF), [Na4(LEt)2]n (3, L Et = [(2,6-Et2C6H3)N(Me)C] 2), and [Mg(LMes)(THF)3] (4), have been synthesized by reduction of the diimine ligands with sodium or magnesium metal. Single-crystal X-ray diffraction analysis revealed that the sodium complexes have a 2:1 [Na2L] unit that aggregates to dimeric (1,2a, 2b) or polymeric (3) structures, while the magnesium complex (4) shows a monomeric 1:1 structure. In all compounds 1-4, the ligand is doubly reduced to a dianion. The two Na+ ions in 1, 2a, 2b, and 3 show different coordination modes, one of which is chelated by the N donors of a ligand with supplementary Na-C bonds to the phenyl ring of another ligand within the [Na2L] 2 dimer, while the other is bonded by the central C2N 2 core of the ligand and solvent molecules (1, 2a, and 2b). Compound 3 displays a novel three-dimensional network. The Mg2+ ion in 4 is coordinated by a ligand molecule and three THF molecules. Density functional theory (DFT) computations on the sodium and magnesium complexes 1 and 4 confirmed their electronic structures and the dianionic character of the ligands.
AB - A series of sodium and magnesium complexes with α-diimine ligands, [Na2(LiPr)(Et2O)]2 (1, L iPr = [(2,6-iPr2C6H 3)N(Me)C]2), [Na2(LMes)(solv) 2]2 (LMes = [(2,4,6-Me3C 6H3)N(Me)C]2, 2a, solv = Et2O; 2b, solv = THF), [Na4(LEt)2]n (3, L Et = [(2,6-Et2C6H3)N(Me)C] 2), and [Mg(LMes)(THF)3] (4), have been synthesized by reduction of the diimine ligands with sodium or magnesium metal. Single-crystal X-ray diffraction analysis revealed that the sodium complexes have a 2:1 [Na2L] unit that aggregates to dimeric (1,2a, 2b) or polymeric (3) structures, while the magnesium complex (4) shows a monomeric 1:1 structure. In all compounds 1-4, the ligand is doubly reduced to a dianion. The two Na+ ions in 1, 2a, 2b, and 3 show different coordination modes, one of which is chelated by the N donors of a ligand with supplementary Na-C bonds to the phenyl ring of another ligand within the [Na2L] 2 dimer, while the other is bonded by the central C2N 2 core of the ligand and solvent molecules (1, 2a, and 2b). Compound 3 displays a novel three-dimensional network. The Mg2+ ion in 4 is coordinated by a ligand molecule and three THF molecules. Density functional theory (DFT) computations on the sodium and magnesium complexes 1 and 4 confirmed their electronic structures and the dianionic character of the ligands.
UR - http://www.scopus.com/inward/record.url?scp=57049187146&partnerID=8YFLogxK
U2 - 10.1021/om800554q
DO - 10.1021/om800554q
M3 - Article
AN - SCOPUS:57049187146
SN - 0276-7333
VL - 27
SP - 5830
EP - 5835
JO - Organometallics
JF - Organometallics
IS - 22
ER -