Synthesis and Structure of Silyl-Substituted Bis(cyclopentadienyl) Scandium(III) Halide Complexes

IF 2.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Organometallics Pub Date : 2024-12-18 DOI:10.1021/acs.organomet.4c0041210.1021/acs.organomet.4c00412

Joseph Q. Nguyen, Lauren M. Anderson-Sanchez, Joseph W. Ziller and William J. Evans*,

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引用次数: 0

Abstract

Despite the importance of bis(cyclopentadienyl) scandium(III) halide complexes as precursors in the development of scandium metallocene chemistry, relatively few examples of this class have been structurally characterized. Since the cyclopentadienyl ring substitution pattern and the halide identity can have a major influence on organoscandium complex synthesis and reactivity, it is critical to have a variety of well-characterized [(C₅R₅)₂ScX]_n starting materials (R = H, alkyl, silyl; X = halide) available for exploration of this area. To remedy this deficiency, reactions between ScX₃ (X = Cl and I) and 2 equiv of a variety of potassium cyclopentadienide reagents have been examined. This has provided, in good crystalline yield, the compounds [C₅H₃(SiMe₃)₂]₂ScI, [C₅Me₄(SiMe₃)]₂ScI, [C₅Me₄(SiMe₂^tBu)]₂ScI, {[C₅H₄(SiMe₃)]₂Sc(μ-I)}₂, {[C₅H₄(SiⁱPr₃)]₂Sc(μ-I)}₂, and {[C₅H₃(SiMe₃)₂]₂Sc(μ-Cl)}₂, each of which has been characterized by X-ray crystallography, elemental analysis, NMR spectroscopy (¹H, ¹³C{¹H}, ²⁹Si{¹H}, and ⁴⁵Sc), and infrared spectroscopy. The study has also revealed the facile cocrystallization of the oxide {[C₅H₃(SiMe₃)₂]₂Sc}₂(μ-O) and hydroxide {[C₅H₃(SiMe₃)₂]₂Sc(μ-OH)}₂ impurities from preparations of [C₅H₃(SiMe₃)₂]₂ScI using samples of ScI₃ that presumably contain an oxide contaminant.

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来源期刊

Organometallics 化学-无机化学与核化学

CiteScore

5.60

自引率

7.10%

发文量

382

审稿时长

1.7 months

期刊介绍： Organometallics is the flagship journal of organometallic chemistry and records progress in one of the most active fields of science, bridging organic and inorganic chemistry. The journal publishes Articles, Communications, Reviews, and Tutorials (instructional overviews) that depict research on the synthesis, structure, bonding, chemical reactivity, and reaction mechanisms for a variety of applications, including catalyst design and catalytic processes; main-group, transition-metal, and lanthanide and actinide metal chemistry; synthetic aspects of polymer science and materials science; and bioorganometallic chemistry.