Non-innocent reactivity of bis-phosphinimine pincer ligands in palladium complexes.
نویسندگان
چکیده
Although the Pd complex of the bis-phosphinimine pincer ligand 1,3-C(6)H(3)(CH(2)N=PPh(3))(2) is accessible, this ligand is also non-innocent in the formation of a phosphinimine-aminophosphine pincer complex; as well, both complexes undergo hydride abstraction generating unique formally cationic ligand complexes.
منابع مشابه
Molecular Structures and Catalytic Activity of Palladium Complexes Derived from Lutidine-bridged Bis(benzimidazolin-2-ylidene) Ligands
Reaction of lutidine-bridged dibenzimidazolium dibromides 1 – 4 with palladium acetate gives pincer-type palladium complexes of the type [Pd(L)Br]Br [5]Br–[8]Br. Crystals suitable for an X-ray diffraction study have been obtained by slow evaporation of the solvent from dichloromethane/methanol solutions of [7]Br and [8]Br. The crystal structure of [7]+ reveals a pincer topology of the cationic ...
متن کاملSolid-phase cyclopalladation in S,C,S'-pincer systems: rising alternative for synthesis in solution.
In pursuit of a new and simple approach to complex organometallic systems, the possibility of formation of a palladium-carbon bond in the solid state via direct cyclopalladation has been studied toward several S,C,S'-pincer ligands with thione sulfur donors of different nature. It is found that mixtures of the ligand and PdCl2(NCPh)2 obtained by the manual grinding of reactants in a mortar effi...
متن کاملReactivity studies of pincer bis-protic N-heterocyclic carbene complexes of platinum and palladium under basic conditions
Bis-protic N-heterocyclic carbene complexes of platinum and palladium (4) yield dimeric structures 6 when treated with sodium tert-butoxide in CH2Cl2. The use of a more polar solvent (THF) and a strong base (LiN(iPr)2) gave the lithium chloride adducts monobasic complex 7 or analogous dibasic complex 8.
متن کاملEnantioselective aza-Morita-Baylis-Hillman reactions of acrylonitrile catalyzed by palladium(II) pincer complexes having C2-symmetric chiral bis(imidazoline) ligands.
Significance: This paper describes the palladiumcatalyzed enantioselective aza-Morita–Baylis–Hillman reaction of acrylonitriles with imines. The bulky pincer ligand enabled the synthesis of enantioenriched α-methylene-β-aminonitriles in high yield. Comment: The palladium–pincer complex preferably activates acrylonitrile, even in the presence of ethyl acrylate. The palladium ketenimide is a key ...
متن کاملSilver(I), gold(I) and palladium(II) complexes of a NHC-pincer ligand with an aminotriazine core: a comparison with pyridyl analogues.
Dinuclear silver, di- and tetra-nuclear gold, and mononuclear palladium complexes with chelating C,N,C diethylaminotriazinyl-bridged bis(NHC) pincer ligands were prepared and characterised. The silver and gold complexes exist in a twisted, helical conformation in both the solution- and the solid state. In contrast, an analogous dinuclear gold complex with pyridyl-bridged NHCs exists in a linear...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Dalton transactions
دوره 40 11 شماره
صفحات -
تاریخ انتشار 2011