Divalent rare-earth metal complexes supported by new alkylene bridged bis(β-diketiminato) ligands: Synthesis, structure and catalytic guanylation of carbodiimides

IF 2.1 3区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Journal of Organometallic Chemistry Pub Date : 2025-02-15 DOI:10.1016/j.jorganchem.2025.123568

Li Xiang, Beibei Mao, Dan Lv, Wensheng Fu

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Abstract

Two new bis(β-diketiminato) ligands, bridged by flexible linkers (1,2-ethylene and 1,3-propylene), were designed and synthesized. Using these ligands, divalent ytterbium complex L1Yb (1; L1 = [μ-(1,2–CH₂CH₂)][N(Me)CH₂CH₂NC(Me)CHC(Me)NDipp]₂²⁻, Dipp = 2,6-(ⁱPr)₂C₆H₃) and divalent samarium complexes L1Sm (2) and L2Sm (3; L2 = [μ-(1,3-CH₂CH₂CH₂)][N(Me)CH₂CH₂NC(Me)CHC(Me)NDipp]₂²⁻) were synthesized and structurally characterized. The divalent samarium complexes 2 and 3 exhibited efficient catalytic activity with 0.1 mol% loading in the guanylation reactions. A systematic study revealed that the reactivity of these complexes is influenced by both the central metal and the nature of the bridging ligands.

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新型亚烯桥接双（β-双酮）配体负载的二价稀土金属配合物：碳二亚胺的合成、结构及催化鸟酰化反应

设计并合成了两种新型的由柔性连接剂（1,2-乙烯和1,3-丙烯）桥接的双苯二酮配体。利用这些配体，二价镱配合物L1Yb (1；L1 = [μ-(1,2 - ch2ch2)][N(Me)CH2CH2NC(Me)CHC（Me)NDipp]22−,Dipp = 2,6-(iPr)2C6H3）和二价钐配合物L1Sm(2)和L2Sm (3)；合成了L2 = [μ-(1,3- ch2ch2ch2)][N(Me)CH2CH2NC（Me)CHC(Me)NDipp]22−）并进行了结构表征。二价钐配合物2和3在负荷量为0.1 mol%的情况下对胍基化反应表现出有效的催化活性。一项系统的研究表明，这些配合物的反应性受到中心金属和桥接配体性质的影响。

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来源期刊

Journal of Organometallic Chemistry 化学-无机化学与核化学

CiteScore

4.40

自引率

8.70%

发文量

221

审稿时长

36 days

期刊介绍： The Journal of Organometallic Chemistry targets original papers dealing with theoretical aspects, structural chemistry, synthesis, physical and chemical properties (including reaction mechanisms), and practical applications of organometallic compounds. Organometallic compounds are defined as compounds that contain metal - carbon bonds. The term metal includes all alkali and alkaline earth metals, all transition metals and the lanthanides and actinides in the Periodic Table. Metalloids including the elements in Group 13 and the heavier members of the Groups 14 - 16 are also included. The term chemistry includes syntheses, characterizations and reaction chemistry of all such compounds. Research reports based on use of organometallic complexes in bioorganometallic chemistry, medicine, material sciences, homogeneous catalysis and energy conversion are also welcome. The scope of the journal has been enlarged to encompass important research on organometallic complexes in bioorganometallic chemistry and material sciences, and of heavier main group elements in organometallic chemistry. The journal also publishes review articles, short communications and notes.