Synthesis and characterization of lithium and yttrium complexes containing tridentate pyrrolyl ligands. Single-crystal X-ray structures of {Li[C4H2N(CH2NMe2)2-2,5]}2 (1) and {[C4H2N(CH2NMe2)2-2,5]YCl2(μ-Cl)·Li(OEt2)2}2 (2) and ring-opening polymerization of ε-caprolactone
摘要:
The lithiated pyrrolyl ligand, {Li[C4H2N(CH2NMe2)(2)-2,5]}(2) (1) was synthesized and structurally characterized. Reaction of 1 with YCl3 in the molar ratio 1:1 in diethyl ether at room temperature afforded a di-yttrium di-lithium tetranuclear complex, {[C4H2N(CH2NMe2)(2)-2,5]YCl2(mu-Cl) center dot Li(OEt2)(2)) 2 (2) in 87% yield. Compounds 1 and 2 were characterized by NMR spectroscopy and single crystal X-ray crystallography. Compound I shows high reactivity for the ring-opening polymerization of epsilon-caprolactone. (c) 2005 Elsevier B.V. All rights reserved.
Synthesis and characterization of lithium and yttrium complexes containing tridentate pyrrolyl ligands. Single-crystal X-ray structures of {Li[C4H2N(CH2NMe2)2-2,5]}2 (1) and {[C4H2N(CH2NMe2)2-2,5]YCl2(μ-Cl)·Li(OEt2)2}2 (2) and ring-opening polymerization of ε-caprolactone
作者:Pei-Cheng Kuo、Jr-Chieng Chang、Wen-Yi Lee、Hon Man Lee、Jui-Hsien Huang
DOI:10.1016/j.jorganchem.2005.06.024
日期:2005.9
The lithiated pyrrolyl ligand, Li[C4H2N(CH2NMe2)(2)-2,5]}(2) (1) was synthesized and structurally characterized. Reaction of 1 with YCl3 in the molar ratio 1:1 in diethyl ether at room temperature afforded a di-yttrium di-lithium tetranuclear complex, [C4H2N(CH2NMe2)(2)-2,5]YCl2(mu-Cl) center dot Li(OEt2)(2)) 2 (2) in 87% yield. Compounds 1 and 2 were characterized by NMR spectroscopy and single crystal X-ray crystallography. Compound I shows high reactivity for the ring-opening polymerization of epsilon-caprolactone. (c) 2005 Elsevier B.V. All rights reserved.