Chromium(IV) Siloxide

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• 作者：Michael P. Marshak ; Daniel G. Nocera
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：February 4, 2013
• 年：2013
• 卷：52
• 期：3
• 页码：1173-1175
• 全文大小：227K
• 年卷期：v.52,no.3(February 4, 2013)
• ISSN：1520-510X

文摘

The reaction of Na(OSip>tp>Bu₂Me) with CrCl₃ yields solid [Cr(OSip>tp>Bu₂Me)₃]_n (1), which can be crystallized in the presence of excess Na(OSip>tp>Bu₂Me) to yield [Na(THF)][Cr(OSip>tp>Bu₂Me)₄] (2). This complex is oxidized to yield Cr(OSip>tp>Bu₂Me)₄ (3), a crystalline chromium(IV) siloxide complex that is air- and moisture-stable. Electronic spectroscopic analysis of the absorption spectrum of 3 indicates a particularly weak ligand field (螖_T = 7940 cmp>鈥?p>) and covalent Cr鈥揙 bonding. 3 provides the first structural and spectroscopic characterization of a homoleptic chromium(IV) siloxide complex and provides a benchmark for tetrahedral chromium(IV) ions residing in solid oxide lattices.