Electrostatic Control of Pd2+ 鈫?Ag+ Transmetalation of a Bis-Imidazoliophosphine Ligand

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• 作者：Yves Canac ; Christian Bijani ; Carine Duhayon ; Remi Chauvin
• 刊名：Organometallics
• 出版年：2013
• 出版时间：August 12, 2013
• 年：2013
• 卷：32
• 期：15
• 页码：4054-4057
• 全文大小：287K
• 年卷期：v.32,no.15(August 12, 2013)
• ISSN：1520-6041

文摘

Attempts to prepare a tetracationic Pd²⁺ complex of the dicationic bis-imidazoliophosphine ligand 1 by AgOTf-mediated chloride abstraction from the corresponding PdCl₂ complex led to the observation of a Pd²⁺ 鈫?Ag⁺ transmetalation giving a tricationic (1)Ag⁺ complex. The driving force of the process is attributed to the relaxation of electrostatic repulsion between the formal positive charges. VTP ³¹P NMR experiments in CD₂Cl₂ afford evidence of a fast equilibrium between the mononuclear (1)Ag⁺ complex and its dimer. The X-ray crystal structure of the latter reveals that bridging TfO^{鈥?/sup> anions allow maintenance of the overall cohesion of the structure through attractive electrostatic interactions.}