Divalent rare-earth metal complexes supported by new alkylene bridged bis(β-diketiminato) ligands: Synthesis, structure and catalytic guanylation of carbodiimides
{"title":"Divalent rare-earth metal complexes supported by new alkylene bridged bis(β-diketiminato) ligands: Synthesis, structure and catalytic guanylation of carbodiimides","authors":"Li Xiang, Beibei Mao, Dan Lv, Wensheng Fu","doi":"10.1016/j.jorganchem.2025.123568","DOIUrl":null,"url":null,"abstract":"<div><div>Two new bis(<em>β</em>-diketiminato) ligands, bridged by flexible linkers (1,2-ethylene and 1,3-propylene), were designed and synthesized. Using these ligands, divalent ytterbium complex <strong>L1Yb</strong> (<strong>1</strong>; L1 = [<em>μ</em>-(1,2–CH<sub>2</sub>CH<sub>2</sub>)][N(Me)CH<sub>2</sub>CH<sub>2</sub>NC(Me)CHC(Me)NDipp]<sub>2</sub><sup>2−</sup>, Dipp = 2,6-(<em><sup>i</sup></em>Pr)<sub>2</sub>C<sub>6</sub>H<sub>3</sub>) and divalent samarium complexes <strong>L1Sm</strong> (<strong>2</strong>) and <strong>L2Sm</strong> (<strong>3</strong>; L2 = [<em>μ</em>-(1,3-CH<sub>2</sub>CH<sub>2</sub>CH<sub>2</sub>)][N(Me)CH<sub>2</sub>CH<sub>2</sub>NC(Me)CHC(Me)NDipp]<sub>2</sub><sup>2−</sup>) were synthesized and structurally characterized. The divalent samarium complexes <strong>2</strong> and <strong>3</strong> 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.</div></div>","PeriodicalId":374,"journal":{"name":"Journal of Organometallic Chemistry","volume":"1030 ","pages":"Article 123568"},"PeriodicalIF":2.1000,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Organometallic Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022328X25000622","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
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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.
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.
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