Synthesis and reactivity of phosphanido bridged 1,1′-bis(diphenylphosphino)ferrocene complexes [(R_F)₂Pt(μ-PPh₂)₂M(dppf)] [M = Pt, Pd]

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• 作者：Daniela Giardina-Papa^a ; ^b ; Irene Ara^a ; Susana Ibá ; ñ ; ez^a ; Piero Mastrorilli^b ; ; Vito Gallo^b ; Juan Fornié ; s^a ;
• 关键词：Palladium ; Platinum ; Phosphanides ; Polynuclear complexes ; Metal&ndash ; metal bonds
• 刊名：Polyhedron
• 出版年：2016
• 出版时间：14 December 2016
• 年：2016
• 卷：120
• 期：Complete
• 页码：44-53
• 全文大小：2008 K
• 卷排序：120

文摘

Hetero-trinuclear complexes of formula [(C6F5)2Pt(μ-PPh2)2M(dppf)] [dppf = 1,1′-bis(diphenylphosphino)ferrocene, M = Pt (1), M = Pd (2)] were prepared by coupling between cis-[(C6F5)2Pt(PPh2)2]Li2 and cis-MCl2(dppf). Reaction of the Pt/Pt/Fe species 1 with [Ag(OClO3)(PPh3)] or I2 resulted in the formation of the complexes [(C6F5)(PPh3)Pt(μ-PPh2)2Pt(dppf)] (3) and [(C6F5)(I)Pt(μ-PPh2)2Pt(dppf)] (4), respectively, in which one of the pentafluorophenyl ligands has been replaced by PPh3 or I. Reaction of the Pt/Pd/Fe species 2 with Ag(ClO4) afforded the tetranuclear complex [(C6F5)2Pt(μ-PPh2)2Pd(dppf)Ag] (5) where the silver atom is bonded to Pd, to one of the bridging P and to one of the dppf P atoms. With [Ag(OClO3)(PPh3)], complex 5 is also formed, although mixed with [Ag(PPh3)2][ClO4]. A dynamic process in solution, in which the silver atom passes from one Pd–μPPh2 bond to the other, has been observed at room temperature for complex 5. The crystal structures of 3, 4 and 5 are reported.