Ligand-exchange reactions, preparation

The ligand exchange reaction of tin halides with bis(trifliioroinethyl)iner-cury has been used to prepare trifluoromethyltin halides [6 7] (equation 5)... 

Ligand exchange reactions can be used to prepare perfluoroalkylzinc compounds Solvated trifluoromethylzinc compounds can be synthesized via the reaction of dialkylzincs with bis(trifluoromethyl)mercury [36] (equation 27) A similar exchange process with bis(trif]uorometliyl)cadinium and diraethylzinc gives a mixture of tnfluoromethylcadmium and zinc compounds [77]... 

Here, we have used this method for the synthesis of Au SG clusters. Undecagold clusters (Aun ) stabilized by triphenyl phosphine (TFF) were prepared according to the literature [6]. An aqueous solution of GSH was placed on top of a chloroform solution of Au TFF. The Au SG clusters were transferred to the aqueous phase as a result of ligand exchange reactions [19]. 

To reduce the high level of internal excitation which results from association of the metal ion with the olefin, adducts are prepared using the ligand exchange reaction 14 and the product is allowed to further... 

Ligand exchange reactions of the zinc complexes are quite rapid (Scheme 4). The equilibrium concentrations of the individual species are attained within the time scale of sample preparation (i.e. <2 min). 

Another method to prepare mixed Li/Al derivatives has been developed by ligand-exchange reactions, starting from the A14N4 cube 39 and LiPHR (R = cyclohexyl) (68). Thus, the outcome of the latter is the rhombododecahedral Li4Al4P6 cluster 40, which bears exohedral THF donor ligands at the lithium centers (Eq. 23) (68). 

Cleavage of tetraaminoethylenes has been most frequently used in the preparation of imidazolidin-2-ylidene complexes. The ligand exchange reaction. 

Both CO2 activation and enolate formation are combined in the preparation of malonic acid derivatives. The reaction of CO2 with methacrylic esters or methacry-lonitrile and under visible light irradiation produced the corresponding aluminum porphyrin malonate complex. When diethylzinc was added to this system, Al(TPP)Et could be regenerated by axial ligand exchange reactions, and the malonic acid derivatives were formed catalytically with respect to the aluminum porphyrins in a one-pot photosynthetic route (Scheme 1). The first step in this... 

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