NDLI: Synthesis, structure and reactivity of dinuclear rare earth metal bis(o-aminobenzyl) complexes bearing a 1,4-phenylenediamidinate co-ligand

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Synthesis, structure and reactivity of dinuclear rare earth metal bis(o-aminobenzyl) complexes bearing a 1,4-phenylenediamidinate co-ligand

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Synthesis, structure and reactivity of dinuclear rare earth metal bis(o-aminobenzyl) complexes bearing a 1,4-phenylenediamidinate co-ligand

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Zhou, Xigeng Hong, Jianquan Chen, Zhenxia Li, Meng Zhang, Lixin
Description	Author Affiliation: Li M ( Shanghai Key Laboratory of Molecular Catalysis and Innovative Material, Department of Chemistry, Fudan University, Shanghai, 200433, China.)
Abstract	A series of phenylenediamidinate rare earth metal complexes $1,4-C_{6}H_{4}[C(NR)_{2}Ln(o-CH_{2}C_{6}H_{4}NMe_{2})_{2}]_{2}$ (R = $2,6-^{i}Pr_{2}-C_{6}H_{3},$ Ln = Y (2a), Lu (2b), Sc (2c)) were synthesized by deprotonation of $1,4-C_{6}H_{4}[C(NR)(NHR)]_{2}$ (1) with two equivalents of n-BuLi followed by reacting with two equivalents of anhydrous $LnCl_{3}$ and subsequently four equivalents of $Li(o-CH_{2}C_{6}H_{4}NMe_{2}),$ or by protolysis of $[Ln(o-CH_{2}C_{6}H_{4}NMe_{2})_{3}]$ with 0.5 equivalent of 1 in THF or toluene . Treatment of complexes 2a and 2b with four equivalents of phenyl isocyanate and phenyl isothiocyanate gave the corresponding insertion products $1,4-C_{6}H_{4}[C(NR)_{2}Ln\{OC(CH_{2}C_{6}H_{4}NMe_{2}-o)NPh\}_{2}(THF)]_{2}$ (Ln = Y (3a), Lu (3b)) and $1,4-C_{6}H_{4}[C(NR)_{2}Ln\{SC(CH_{2}C_{6}H_{4}NMe_{2}-o)NPh\}_{2}]_{2}$ (Ln = Y (4a), Lu (4b)), respectively. The structures of 1, 3b, and 4a were established by X-ray diffraction studies. Complexes 2 show high activity for rac- lactide and ε-caprolactone polymerization ; for the former a synergistic effect between two metal centers is observed.
ISSN	14779226
Issue Number	23
Journal	Dalton Trans.
Volume Number	42
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2013-06-21
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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