Structure-Property Studies of Niobium (N-Heterocyclic) Carbene Complexes

IF 2.2 4区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR

European Journal of Inorganic Chemistry Pub Date : 2024-12-12 DOI:10.1002/ejic.202400516

Mark Eissler, Fuxing Shen, Jagan Rajamoni, Stephen M. Holmes

引用次数: 0

Abstract

The structures and magnetic properties of four paramagnetic bis(carbene)niobium and a diamagnetic monocarbene complex are described. Crystallographic studies show solvated crystals of NbCl₄(IMes)₂ (1 ⋅ C₇H₇), NbCl₃(IMes)₂ (2 ⋅ Et₂O and 2 ⋅ C₅H₁₂), and NbOCl₂(IMes)₂ (3 ⋅ Et₂O) adopt distorted structures consistent with second-order Jahn-Teller carbene-halide interactions. Magnetic studies indicate 1–3 display appreciable temperature-independent paramagnetism contributions to their S=1/2, 1, and 1/2 spin ground states, respectively. Slow magnetization relaxation dynamics are seen below ca. 6 and 50 K, which are ascribed as arising from Raman and direct/Raman pathways for 1 and 3, respectively.

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铌（n -杂环）卡宾配合物的结构与性能研究

描述了四种顺磁性双卡宾铌和一种反磁性单卡宾配合物的结构和磁性。晶体学研究表明，NbCl4(IMes)2（1⋅C7H7）、NbCl3(IMes)2（2⋅Et2O和2⋅C5H12）和NbOCl2(IMes)2（3⋅Et2O）的溶剂化晶体呈畸变结构，符合二阶Jahn-Teller碳卤化物相互作用。磁性研究表明，1 - 3分别对其S=1/2、1和1/2自旋基态表现出可观的温度无关顺磁性贡献。在ca. 6和50 K以下可以看到缓慢的磁化弛豫动力学，分别归因于1和3的拉曼路径和直接/拉曼路径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

European Journal of Inorganic Chemistry 化学-无机化学与核化学

CiteScore

4.30

自引率

4.30%

发文量

419

审稿时长

1.3 months

期刊介绍： The European Journal of Inorganic Chemistry (2019 ISI Impact Factor: 2.529) publishes Full Papers, Communications, and Minireviews from the entire spectrum of inorganic, organometallic, bioinorganic, and solid-state chemistry. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies. The following journals have been merged to form the two leading journals, European Journal of Inorganic Chemistry and European Journal of Organic Chemistry: Chemische Berichte Bulletin des Sociétés Chimiques Belges Bulletin de la Société Chimique de France Gazzetta Chimica Italiana Recueil des Travaux Chimiques des Pays-Bas Anales de Química Chimika Chronika Revista Portuguesa de Química ACH—Models in Chemistry Polish Journal of Chemistry The European Journal of Inorganic Chemistry continues to keep you up-to-date with important inorganic chemistry research results.