The silver(I) complex [HB{3-(CF₃),5-(CH₃)Pz}₃]AgNCCH₃ supported by a partially fluorinated scorpionate ligand

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• 作者：H. V. Rasika Dias and Naveen Kulkarni
• 关键词：scorpionate ; tris(pyrazolyl)borate ; silver ; crystal structure ; nitrile ; C&mdash ; H activation catalyst
• 刊名：Acta Crystallographica Section C
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：72
• 期：11
• 页码：853-856
• 全文大小：394K
• ISSN：1600-5759

文摘

Tris(pyrazolyl)borates are used extensively in metal coordination chemistry and belong to a class of ligands generally referred to as scorpionates. The steric and electronic properties of these ligands can be modified quite easily by varying the substituents on the 3-, 4-, and 5-positions of the pyrazolyl moieties on the B atom. Fluorinated tris(pyrazolyl)borates are useful in the stabilization of rare silver(I) complexes. The silver(I) adduct (acetonitrile-κN){tris[5-methyl-3-(trifluoromethyl)pyrazol-1-yl-κN²]hydroborato}silver(I), [Ag(C₁₅H₁₃BF₉N₆)(CH₃CN)] or [HB{3-(CF₃),5-(CH₃)Pz}₃]AgNCCH₃, was obtained by treating [HB{3-(CF₃),5-(CH₃)Pz}₃]Na with CF₃SO₃Ag in the presence of acetonitrile, and was isolated in 85% yield. Single-crystal X-ray diffraction analysis reveals that the Ag^I center has a pseudo-tetrahedral all-nitrogen coordination sphere, and is supported by a tris(pyrazolyl)borate ligand that binds to the Ag^I center in a κ³-fashion.