钛（III） Tris(alkyl) Ti{CH(SiMe3)2}3的表征及其向二聚体烷基桥接钛（IV）的转化。

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemistry - A European Journal Pub Date : 2025-01-19 DOI:10.1002/chem.202404696

Philip P Power, Connor P McLoughlin, Anthony J Witt, Anni Maijala, Angela A Shiau, Guodong Rao, R David Britt, Heikki M Tuononen

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引用次数: 0

摘要

三种等价物LiCH(SiMe3)2与TiCl3(NMe3)2反应，得到罕见的同感化合物Ti（III）烷基Ti{CH(SiMe3)2}3(1)，结晶成蓝针状，产率为32%。1的单晶x射线数据显示钛周围呈三角锥体配位几何，计算结果表明这可能是由于C-H键与Ti（III）原子之间的弱相互作用。x波段EPR光谱给出了与所提出的Ti（III）配方一致的光谱参数。溶液1在室温下是不稳定的，这是由于分子内C-H活化产生了二聚体Ti（IV）配合物[{(Me3Si)2HC}Ti{μ-CH HSiMe3}]2(2)。

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Characterization of the Titanium(III) Tris(alkyl) Ti{CH(SiMe3)2}3 and its Conversion to a Dimeric Alkyl-bridged Titanium(IV) Species.

The reaction of three equivalents of LiCH(SiMe3)2 with TiCl3(NMe3)2 afforded the rare homoleptic Ti(III) alkyl Ti{CH(SiMe3)2}3 (1) which crystallized as blue needles in 32 % yield. Single crystal X-Ray data for 1 showed a trigonal pyramidal coordination geometry around titanium, which could be ascribed to weak interactions between the C-H bonds and the Ti(III) atom based on computational results. X-band EPR spectroscopy give spectral parameters consistent with the proposed Ti(III) formulation. Solutions of 1 are unstable at room temperature owing to intramolecular C-H activation that gave a dimeric Ti(IV) complex [{(Me3Si)2HC}Ti{μ-CH HSiMe3}]2 (2).

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来源期刊

Chemistry - A European Journal 化学-化学综合

CiteScore

7.90

自引率

4.70%

发文量

1808

审稿时长

1.8 months

期刊介绍： Chemistry—A European Journal is a truly international journal with top quality contributions (2018 ISI Impact Factor: 5.16). It publishes a wide range of outstanding Reviews, Minireviews, Concepts, Full Papers, and Communications from all areas of chemistry and related fields. Based in Europe Chemistry—A European Journal provides an excellent platform for increasing the visibility of European chemistry as well as for featuring the best research from authors from around the world. All manuscripts are peer-reviewed, and electronic processing ensures accurate reproduction of text and data, plus short publication times. The Concepts section provides nonspecialist readers with a useful conceptual guide to unfamiliar areas and experts with new angles on familiar problems. Chemistry—A European Journal is published on behalf of ChemPubSoc Europe, a group of 16 national chemical societies from within Europe, and supported by the Asian Chemical Editorial Societies. The ChemPubSoc Europe family comprises: Angewandte Chemie, Chemistry—A European Journal, European Journal of Organic Chemistry, European Journal of Inorganic Chemistry, ChemPhysChem, ChemBioChem, ChemMedChem, ChemCatChem, ChemSusChem, ChemPlusChem, ChemElectroChem, and ChemistryOpen.