Amine-substituted α-N(standard)- and δ-N(remote)-pyridylidene complexes: Synthesis and bonding

详细信息    查看全文

• 作者：Elzet  ; Stander-Grobler^a ; Christoph E.  ; Strasser^a ; Oliver  ; Schuster^a ; Stephanie  ; Cronje^a ;   ; ^b ; Helgard  ; Raubenheimer^a ;   ; ^{hgr@sun.ac.za}
• 关键词：NHC ; Remote pyridylidene ; Amino pyridylidene ; Palladium ; Nickel
• 刊名：Inorganica Chimica Acta
• 出版年：2011
• 出版时间：1 October 2011
• 年：2011
• 卷：376
• 期：1
• 页码：87-94
• 全文大小：639 K
• ISSN：S0020169311004981

文摘

Reaction of ortho-amino-para-chloro- and ortho-chloro-para-amino-pyridinium triflate with tetrakis(triphenylphosphine) complexes of Ni or Pd afforded by oxidative substitution compounds that can be represented as cationic carbene complexes. NMR as well as X-ray structural studies revealed the role played by the NMe₂ and M(PPh)₂Cl (M = Ni or Pd) substituents in stabilizing the complexes by π-retro-donation and, consequently, in governing the relative importance of certain mesomeric representations describing their structures.