Oxidative Addition Versus Substitution Reactions of Group 14 Dialkylamino Metalylenes with Pentafluoropyridine

详细信息    查看全文

• 作者：Prinson P. Samuel ; Amit Pratap Singh ; Sankaranarayana Pillai Sarish ; Julia Matussek ; Ina Objartel ; Herbert W. Roesky ; Dietmar Stalke
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：February 4, 2013
• 年：2013
• 卷：52
• 期：3
• 页码：1544-1549
• 全文大小：293K
• 年卷期：v.52,no.3(February 4, 2013)
• ISSN：1520-510X

文摘

Dialkylamino compounds of group 14 elements (Si, Ge, Sn) in the +2 oxidation state supported by benzamidinate ligands were synthesized and treated with pentafluoropyridine. Two different modes of reactivity were observed, depending on the metal atom and the basicity of the substituent at the metal. Pentafluoropyridine undergoes oxidative addition reaction at the Si(II) and Ge(II) atoms whereas at the Sn(II) atom substitution of the NMe₂ group by the para fluorine of pentafluoropyridine occurs. The C鈥揊 bond activation by the lone pair of germanium is the first report of this kind. The Sn(II) fluoride obtained has an elongated Sn鈥揊 bond length and can be used as a good fluorinating agent. The compounds were characterized by multinuclear NMR spectroscopy, mass spectrometry, elemental analysis, and X-ray structural analysis. Single crystal X-ray structural analysis of the tin fluoride shows an asymmetric dimer with weak interactions.