Aibing Xia

Synthesis, structure, and properties of magnesium complexes containing cyclopentadienyl and amidinate ligand sets

[CpMgMe(Et2O)]2 was prepared by dissolving Cp2Mg and dimethylmagnesium together in diethyl ether. It reacted readily with diphenylamine, 3-amino-2,4-dimethylpentane, 2,6-diisopropylaniline, N-isopropylbenzylamine, and diisopropylamine in diethyl ether to afford the dimeric amido complexes [CpMg(NPh2)]2 (83%), [CpMg(NHCH(CH(CH3)2)2)]2 (75%), [CpMg(NHiPr2C6H3)]2 (61%), [CpMg(N(iPr)(CH2Ph))]2 (62%), and [CpMg(NiPr2)]2 (81%) as colorless crystalline solids. Treatment of [CpMgMe(Et2O)]2 with N,N,N‘-trimethylethylenediamine in diethyl ether yielded dimeric [CpMg(MeNCH2CH2NMe2)]2 (76%). The reaction of [CpMgMe(Et2O)]2 with 2,5-bis(dimethylaminomethyl)pyrrole in diethyl ether led to the formation of the monomeric magnesium pyrrolato complex [CpMg(Et2O)(η2-Me2NCH2(C4H2N)CH2NMe2)] (70%). The X-ray crystal structures of [CpMg(NPh2)]2, [CpMg(NHCH(CH(CH3)2)2)]2, [CpMg(NHiPr2C6H3)]2, [CpMg(N(iPr)(CH2Ph))]2, and [CpMg(Et2O)(η2-Me2NCH2(C4H2N)CH2NMe2)] were determined. In the solid state structures, [CpMg(NPh2)]2, [CpMg(N...

Synthesis, structure, and properties of magnesium complexes containing mixed cyclopentadienyl and amido ligand sets

[CpMgMe(Et2O)]2 was prepared by dissolving Cp2Mg and dimethylmagnesium together in diethyl ether. It reacted readily with diphenylamine, 3-amino-2,4-dimethylpentane, 2,6-diisopropylaniline, N-isopropylbenzylamine, and diisopropylamine in diethyl ether to afford the dimeric amido complexes [CpMg(NPh2)]2 (83%), [CpMg(NHCH(CH(CH3)2)2)]2 (75%), [CpMg(NHiPr2C6H3)]2 (61%), [CpMg(N(iPr)(CH2Ph))]2 (62%), and [CpMg(NiPr2)]2 (81%) as colorless crystalline solids. Treatment of [CpMgMe(Et2O)]2 with N,N,N‘-trimethylethylenediamine in diethyl ether yielded dimeric [CpMg(MeNCH2CH2NMe2)]2 (76%). The reaction of [CpMgMe(Et2O)]2 with 2,5-bis(dimethylaminomethyl)pyrrole in diethyl ether led to the formation of the monomeric magnesium pyrrolato complex [CpMg(Et2O)(η2-Me2NCH2(C4H2N)CH2NMe2)] (70%). The X-ray crystal structures of [CpMg(NPh2)]2, [CpMg(NHCH(CH(CH3)2)2)]2, [CpMg(NHiPr2C6H3)]2, [CpMg(N(iPr)(CH2Ph))]2, and [CpMg(Et2O)(η2-Me2NCH2(C4H2N)CH2NMe2)] were determined. In the solid state structures, [CpMg(NPh2)]2, [CpMg(N...

Synthesis and characterization of cyclopentadienyl thiolato complexes of magnesium

Treatment of Cp 2 Mg with 2-methyl-2-propanethiol, cyclohexanethiol, and 2-propanethiol in toluene at ambient temperature afforded the tetrameric cyclopentadienyl thiolato complexes [(η 5 -Cp)Mg(μ 3 -S t Bu)] 4 (97%), [(η 5 -Cp)Mg(μ 3 -S(C 6 H 11 ))] 4 (92%), and [(η 5 -Cp)Mg(μ 3 -S i Pr)] 4 (83%) as colorless crystalline solids. Treatment of [(η 5 -Cp)Mg(μ 3 -S t Bu)] 4 with tetrahydrofuran or tert -butylpyridine in dichloromethane/hexane afforded the dimeric solvated complexes [(η 5 -Cp)Mg(μ 2 -S t Bu)(THF)] 2 (78%) or [(η 5 -Cp)Mg(μ 2 -S t Bu)( t Bupy)] 2 (60%) as colorless crystals. The crystal structures of [(η 5 -Cp)Mg(μ 3 -S t Bu)] 4 , [(η 5 -Cp)Mg(μ 2 -S t Bu)(THF)] 2 , and [(η 5 -Cp)Mg(μ 2 -S t Bu)( t Bupy)] 2 were determined by X-ray diffraction methods. In the solid-state structure, [(η 5 -Cp)Mg(μ 3 -S t Bu)] 4 contains one η 5 -cyclopentadienyl ligand per magnesium and one cubic core of Mg 4 S 4 that features a mirror plane of symmetry along one diagonal Mg 2 S 2 plane. [(η 5 -Cp)Mg(μ 2 -S t Bu)(THF)] 2 contains one η 5 -cyclopentadienyl ligand per magnesium and one bent Mg 2 S 2 core with a mirror plane along thiolato bridges. [(η 5 -Cp)Mg(μ 2 -S t Bu)( t Bupy)] 2 contains one η 5 -cyclopentadienyl ligand per magnesium and a planar Mg 2 S 2 core with a center of symmetry.

Synthesis, Characterization and Applications of Novel Iminophosphinites

Ligand design plays an important role in organometallic synthesis and catalysis. The combination of a soft donor and a hard donor induces different interactions between metal centers and the unsymm...

CCDC 1486115: Experimental Crystal Structure Determination

Related Article: Christina Jones, Matthew Timm, Jason D. Masuda, Aibing Xia|2017|Can.J.Chem.|95|1041|doi:10.1139/cjc-2017-0349